gas compression facilities in oil · pdf file · 2013-12-07gas compression...

PRODUCTION GAS DEPARTMENT NOTE NO. 16

GAS COMPRESSION

FACILITIES IN OIL

A GLIMPSE ON HISTORY, PERFORMANCE AND CURRENT

STATUS

S. K. SARMAH CEPG (O & M)

PRODUCTION GAS DEPARTMENT

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CONTENTS

1. Executive Summary Page 3

2. Preamble Page 5

3. Function of gas compression facilities Page 6

4. History of compressor facilities in oil Page 7

5. Performance vis-à-vis OIL’s experience with Page 9 current fleet of compressor packages

6. Spares : provision modality, availability and constraints Page 12

7. Technology induction in Gas Compressor operation Page 14

8. Write-off plan of compressor packages Page 17

9. Augmentation of compression infrastructure Page 19

10. Hiring of compression service 1

11. Conclusion and Acknowledgement Page 22

ANNEXURES

Annexure I : Holding of Gas Compressors as on 1st April, 2013 Annexure II : Written Off Gas Compressor packages Annexure III : Proposed write off plan of Gas Compressors up to 2016-17. Annexure IV : Total holding of Gas Compressors after Write Off. Annexure V : Capacity availability of Gas Compressor Stations

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EXECUTIVE SUMMARY 1.0 OIL introduced compression facilities way back in 1962. Over the years, OIL

acquired a large fleet of Gas Compressor packages from 9 (nine) different sources, both indigenous and imported.

2.0 Presently OIL uses gas compressors for collecting low pressure gas (LPB) and providing gas lift gas (GL) for gas lift oil wells. Earlier gas compressors were also used for gas injection and gas storage purposes.

3.0 Since gas injection and gas storage requirement no longer exits, some of the Gas Injection and Gas Storage compressors have now been utilized as Gas Lift Compressors.

4.0 Present population of LPB and GL compressors are 62 and 57 Nos. respectively. Out of these compressors, about 30 Nos. LPB and 33 Nos. GL compressors are on operation daily.

5.0 In order to sustain availability of compressor packages over the years, replacement plan of the compressor fleet is done at regular interval. Accordingly, altogether 82 packages have so far been written off and replaced suitably. Presently, another 14 compressors have been earmarked to write off by 2015-16 and another 8 compressors by 2016-17.

6.0 Write off strategy is based on performance of the compressor packages and not on vintage of the compressor.

7.0 So far as performance level is concerned, the performance of Worthington make packages have been found to be much superior, as evident from lower breakdown frequency, lower consumption of spares and consistent output throughout the entire life cycle since commissioning in 1986.

8.0 As there is a large mix of make and models of gas compressor packages operating in different service duties, wide range of spares are to be managed which is a challenging task. Main constraints for spare management are long lead time, delayed delivery, high cost of OEM spares, obsolesce due to technology up-gradation / design change etc. However, with constant monitoring and advanced planning, availability of the right spares at the right time has been achieved.

9.0 To keep pace with the latest development of technological changes, consistent efforts have been put in for induction of newer and latest technology in compressor operations. Two major technologies which have recently been inducted are CPU-95 Ignition System and Electronic Control Panel for gas compressor packages.

10.0 Continuous efforts have been put in to re-use costly machine parts like engine / compressor blocks etc by reconditioning / salvaging the same at indigenous workshops as a cost saving measure.

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11.0 SCADA input is extensively used for on time monitoring of compressor operations.

12.0 Outsourcing of compression service is one of the significant initiatives taken by the department towards collection of low pressure gas. Presently, about 2,20,000 SCM of gas is collected through compression services. It is planned to hire compression services for 2 more locations for collection of low pressure gas.

13.0 In order to meet the gas compressor requirement due to variable gas production from OCSs, continuous efforts has been put in for relocation of compressors from one location to another.

14.0 Construction of smaller capacity Compressor Station with reduced facility was introduced to manage compressor requirement till permanent Compressor Station is constructed. Such station is presently in operation in Dikom, and another station is being built up in Tengakhat area.

15.0 To manage manpower shortage for compressor operation, it is planned to close down a few stations, like Kathalguri (old) and GCS 7, by re-siting of the compressors without any operational drawback.

16.0 Presently, procurement process has been initiated for acquisition of 6 nos. of LPB and 7 nos. of GL compressors against approved capital budget.

17.0 Further, activities for construction of full fledged Gas Compressor Station in Makum, Dikom and Tengakhat area has already been started under Production Project Department. Additionally, compressor stations at Baghjan and Barekuri are also planned as a long term measure.

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PREAMBLE The gas compression history in OIL operational area dates back to 1962, with procurement and installation of two (2) nos. Cooper Bessemer make Gas Injection compressors in GCS 1 for reservoir pressure maintenance purpose. Subsequently there is continuous growth of compression infrastructure and till date, a total of 201 nos. of Gas Compressor packages of different duties and capacities have been procured and installed in various installations (GCS) over the years. Out of this, presently 119 nos. compressor packages have been in operation. The note captures the history of gas compressor facilities; performance level of current fleet of compressors; provision, modality, availability and constraints in spares management; write off plan of compressor packages and augmentation need of compression infrastructure in various installations for enhancement / sustenance of oil production and flare reduction in the fields. The initiative taken by department for hiring of compression service through BOO system towards reduction of flare has also been highlighted in the note.

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FUNCTION OF GAS COMPRESSON FACILITIES After multistage separation of crude oil and gas at the oil collecting station(OCS), associated natural gas of low pressure (L.P) and high pressure (H.P) are available at the pressure range of 1.3-2.5 Kg/cm2 and 14-21 Kg/cm2 respectively. The gas streams are then compressed to different higher pressure ranges with the help of Low Pressure Booster Compressors (LPB) and Gas Lift Compressors (GL) so as to utilize in different schemes, such as a) Meeting Market commitment, internal consumption and LPG extraction. b) Gas Lift requirement to artificially lift oil wells for crude oil production The recycled gas from gas lift wells is available at low pressure (LP stream) which is again compressed to 14-21 Kg/cm2. Besides the above two purposes, the company also used to operate Gas Injection Compressor (GI) for reservoir pressure maintenance and Gas Storage Compressors (GS) to store LPG stripped lean surplus gas. But these two types of Gas Compressors has been discontinued in the field for non requirement of gas injection duty on geological consideration and steady and increased demand in the market by various consumers. Some of the GI compressors and entire fleet of GS compressors have now been utilized as Gas Lift Compressors in the fields. Considering more thrust on meeting the increasing market commitment and reduction of wastage through gas flaring as well as to avoid any loss of crude oil production from artificial wells as well as for achieving higher crude oil target, availability of optimum gas compressors with adequate standby provision in the fields has become necessary to avert downtime and production loss.

Presently there are 18 Gas Compressor Stations (GCS) in operation wherein the compressor packages have been installed depending on low pressure gas availability and requirement of lift gas of a particular area under the Oil Collecting Stations (OCS). Earlier, operation of 2 GCSs, namely GCS 3 and Moran GCS 1 have been discontinued for non existence of specific requirement in the respective areas.

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HISTORY OF COMPRESSOR FACILITIES IN OIL The development of compression facilities in our fields were initiated way back in 1962, and time to time compressor packages have been added based on review for compressor requirement vis-à-vis gas availability at the OCSs/ gas lift gas requirement. Over the years, OIL acquired a large fleet of compressors from various sources- both indigenous and imported. Majority of the compressors are gas engine driven while some are electric motor driven. The requirement of compressors (L.P. Booster and Gas Lift duties) has been increasing on account of ageing of the old fields, ageing of the existing equipment, discovery of new fields in out step /new locations, as a measure necessary for reduction of gas flaring, increasing gas demand from the consumers and for gas lift function. The following table indicates make and quantum of compressors procured by the department over the years.

Sl No

Make Qty Year of purchase

P.O Reference

1 Cooper Bessemer (USA) 2 1962 a) 1459 of 20.07.1962 – 2 Nos. 2

Nouvo Pignone (Italy)

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1967

a) SSF/1 of 19.11.1966 – 6 Nos. b) SSF/7 of 22.06.1967 – 9 Nos. c) SSF/8 of 22.06.1967 – 7 Nos. d) SSF/12 of 27.01.1968 – 2 Nos.

3 CA Parson (USA) 4 1966 a) OIL/3654 of 09.02.66 – 4 Nos. 4 IR (Canadian) 33 1972

to 1974

a) SSF/38 of 30.03.72 – 21 Nos. b) 140044/DJ of 17.09.73 – 5 Nos. c) 140320/DJ of 17.07.74 – 7 Nos.

5 KG Khosla (India) 5 1983 a) 130026/DJB of 20.07.83 – 5 nos. 6 CSIWorthington (USA) 19 1986 a) 145000/DJ of 03.06.85 – 19 Nos. 7 BPCL ( India) 43 1975

to 2010

a) 136200/DJ of 24/3/75 - 8 Nos. b) 137120/DJ of 14/8/76 - 2 Nos. c) 137640/DJ of 3/2/77 - 2 Nos d) 130174/DJ of 27/4/85 - 4 Nos. e) 135014/DJ of 31/5/86 - 3 Nos. f) 135015/DJ of 31/5/86 - 2 Nos. g) 135400/DJ of 02/01/94 - 7 Nos. h) 135806/FDP6 of 12/2/99 - 2 Nos. i) 136346/FDP6 of 21/10/03- 3 Nos. j) 7902498/DFD of 03.11.07 -10 Nos.

8 Ingersoll-Rand (India) 22 1977 1994

a) 137485/SJ of 10/1/77 - 19 Nos b) 135415/DJ of 9/3/94 - 3 Nos.

9 Atlas Copco (India) 49 1989 to

1992

a) 135076/DJof 16/04/88 - 15 Nos. b) 135128/DJ of 7/7/89 - 16 Nos c) 135236/DJ of 27/3/91 - 18 Nos.

TOTAL

201

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In the past for various reasons such as ageing, inefficiency, high operating runs with increased maintenance efforts, machine beyond economic repairing etc. machines have been written off from time to time as shown below.

Sl No Make Quantity Written Off

1 Cooper Bessemer (USA) 2 2 Nouvo Pignone(Italy) 24 3 CA Parson (USA) 4 4 IR (Canadian) 29 5 BPCL ( India) 14 6 IR (India) 4 7 KGK 5 TOTAL 82

After written of the above units, total holding of compressor packages at present is 119 nos. Out of this 62 nos. are LPB compressors and 57 nos. are Gas Lift Compressors. The details of the presently available compressors are provided in the following table.

Sl No Make LP Booster Gas Lift Total 1 IR (Canadian) 3 1 4 2 CSI Worthington 14 5 19 4 BPCL 13 16 29 5 Ingersoll-rand (India) 11 7 18 6 Atlas Copco (India) 21 28 49 TOTAL 62 57 119

Station wise deployment of the above compressors along with relevant details such as vintage, cumulative running hours, present condition are presented in enclosed Annexure I.

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PERFORMANCE VIS-À-VIS OIL’S EXPERIENCE WITH CURRENT FLEET OF COMPRESSOR PACKAGES

The current fleet of operating Gas Compressors in our field were installed at different times starting from 1972 and almost 65 % of total available units are of vintage more than 25 years. A summary of the installed units during the last five decades along with average vintage of packages is presented below. Procurement

Period Quantity Procured

Written off quantity

Quantity Currently in operation

Average Vintage of operating units

1960 - 1970 30 30 0 0 1970 - 1980 64 42 22 35 years 1980 - 1990 64 10 54 25 Years 1990 - 2000 30 0 30 15 Years

2000 - Present 13 0 13 5 years Total 201 82 119

For the units having vintage more than 25 years (procured till 1985), current performance level is expected to be lower than optimum because of aging associated with increased wear and tear as well as material fatigue, uninterrupted operation, operational severity and a host of other factors. However with increased maintenance efforts, it has been possible to keep the units operational, but at reduced efficiency. It is pertinent to mention here that, except K.G. Khosla make compressor packages, all other compressor packages have found to be performed at satisfactory level in general during the operating life cycle despite occasional failures. However, out of the entire lot, performance level of Worthington make packages have found to be much superior, as evident from lower breakdown frequency, lower consumption of spares and consistent output throughout the entire life cycle since commissioning in 1986. A brief write up on the individual performance level vis-à-vis problems encountered with different makes of the compressor packages is presented below. (i) Ingersoll-Rand (Canadian) Make Compressor

These units are of 1972-74 vintage, having Waukesha Engines as prime movers (Model L7042, L5790, L5108 and L3711). These machines with sound inherent design and packaging have been performing satisfactorily excepting machines with L3711 Engines. Almost all of them have crossed their economical operational life and few are long shut down beyond economical revival. Because of ageing and natural wear & tear, machines presently do not perform trouble- free beyond operating speed of 600/700 RPM. The gas engines, Waukesha models, L5108 and L3711 (Clinton series) have been discontinued in the OEM’s production line. The L3711 Gas Engines have inherent problems of cylinder head overheating following high rate of breakdown due to cracked cylinder

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heads/ manifolds. Many of these have crossed long operational run (most of them are beyond 1 lakh hours) and have extreme worn-out condition. From economical standpoint, revamping of these units is not feasible. Moreover spares availability of the model is extremely difficult. Already all units having L3711 engines have been written off. Although L5108 Waukesha Engines are discontinued in the production line, the engines do not have much serious problem on design and operational consideration. However availability of spares has now become a serious concern for operating the units. (ii) BPCL make Compressors

Due to the poor packaging and certain internal design flaws of earlier lot, these machines are very much affected by vibration and increased frequency of breakdown, particularly 5 MMSCFD or 130 MSCMD capacity LP Booster Compressors, at speed higher than 700 RPM. In the packages supplied (1990 and beyond) by them, improvement in the packages has been noticed to some extent in terms of delivery, erection schedule, packaging of units, reliability of equipment, design, and after sale service. But these machines again have acute problem in the indigenously make coolers. However, in the recently supplied units (2010), imported coolers have been incorporated and out of 10 units supplied, 4 nos. Gas Lift compressors and 1 no. LPB compressor has so far been commissioned. But several issues cropped up during erection / commissioning of these packages, like material short supply, statutory approval / certification of field instruments, commissioning schedule etc., in which BPCL has failed in fulfilling the contractual obligations. Poor after sales service of BPCL is also a matter of great concern. Further, post commissioning run of the units is also discouraging as there are a number of breakdown of critical components of the compressor packages, presumably due to lack of adequate quality control measures during manufacturing and packaging stages. Till date, 14 units of BPCL make have been written off. (iii) KG Khosla make Compressor Electric motor driven L P Boosters (2 nos.) and Gas Lifters (2 nos.) units of KG Khosla make were installed in 1985. KGK Compressors have acute operational problems due to inherent design / manufacturing flaws, and lack of workmanship in manufacturing and packaging. It is obvious that efficient operation of gas compressor packages is result of quality and soundness in the design of machinery, manufacture, packaging, erection and after sales service. In respect of the supplied packages, M/S KGK has appeared to be lacking in attaining the expected level in terms of delivery, erection schedule, packaging of units, reliability of equipment, design, and after sale service. The operating performance of these machines is very poor with low availability and the maintenance efforts required for these machines are high. Another gas engine (2 stroke Janbacher make, Austria) driven LP Booster unit installed at GCS7 could not be operated and had to be discontinued for various problems including very high degree of sound level. All the above five units have been written off.

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(iv) Worthington Gas Compressors Out of all the lots procured so far, both imported and indigenous, these machines have been operating very smoothly (since commissioned in 1986) for last 25 years without any major problems and with minimum spares consumption. Only recently due to normal fatigue and wear & tear, these have been showing ageing effect and much attention is now needed to carry out major overhaul and replacement of many vital/major and minor components. However it is opined that all these units are expected to cover another 5 years with constant monitoring and scheduled servicing. (v) Ingersoll-Rand ( India) These units were procured and installed in two batches, the first batch of 19 nos. between 1980 to 1984, and the second batch of 3 nos. in 1994. The performance of 19 (13 Motor driven, 6 Engine driven) units was not up to the mark as there had been frequent breakdown, high rate of spares consumption and labour cost due to failures in the compressor components. Although the design criteria of the compressors are similar to that of IR (Canadian), but the machines are performing poorly presumably due to inferior materials, finish of the components, inefficient packaging etc. It is pertinent to mention that identical model of compressors, supplied by their foreign principal are devoid such problems. However with constant in-house effort and with replacement of many components, there has been improvement in their availability. The last 3 units (with Waukesha L7042 engine) are functioning well without any major trouble (except indigenous make cooler) till now. Till date, 4 units of IR (I) make have been written off. (vi) Atlas Copco (India) Compressors These machines were procured and installed in three batches (15, 16 & 18 nos.) between 1988 and 1992.The performance of these machines so far satisfactorily below 700 RPM, especially in L.P. Booster units. These are problematic beyond 700 RPM causing vibration and exhaust overheat/overload. Spares consumption presently are on the rise due to ageing of the machines. However it is expected that these will continue in operations (with capacity deration) for next 5 - 7 years.

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SPARES : PROVISION MODALITY, AVAILABILITY AND CONSTRAINTS As there is a large mix of make and models of gas compressor packages operating in different service duties, very wide range of spares are involved in the Spares Management System. However because of little interchangeability, inventory control of Gas Compressors is very critical. Spares are required to provide for failures and preventive maintenance (PM) due to

i) Normal wear & tear owing to ageing/operation ii) Working /operating conditions iii) Overload of machines iv) Accidents/Breakdowns.

During the operational life of compressors, due to dynamic motion of components, wear and tear occurs in various components warranting repairing or replacement during overhauling (Top & Major overhauling) and other scheduled maintenance. Similarly working/operating conditions also attribute to the cause of spares requirement. Spare part requirements can be planned and the policy pertaining to stocking can be made based on annual rate of consumption with some tolerances against uncertainty. The problem of failures and spares requirement gets more complicated towards the end of life of a particular machine. The entire spares are categorized based upon (i) their consumption value (ii) their criticality-whether vital, essential or desirable (iii) their availability-whether scarce, difficult and easy and (iv) Usage Rate – frequency of use or slow/fast moving item etc. By analyzing criticality level of each spares, stocking policy is required to be determined. The items that are subject to dynamic loading/frictional force can have more wear & tear and /or fatigue and usually have high usage rate and this require much attention in spares management for PM (Preventive Maintenance) to reduce downtime due to any breakdown. For catering spares of large fleet of gas compressor packages, provisioning of spares is primarily done against store’s stock of Materials department, keeping in mind the consumption value, consumption pattern of items and insurance item. Other procurements are made through Direct Charge Indents for items of non- regular consumption. Besides, some high value items, which have been replaced following failure due to wear & tear are salvaged and kept for re-use. Many components of gas engines, compressors, aerial coolers have been indigenously developed at low cost. However the reliability factors of the salvaged and indigenous components are low and sometimes failures are unpredictable. There are some other groups of materials that are non-standard in nature which are developed / fabricated in-house. While making provisions for spares of the large variety of makes and models, constraints are usually faced, like long lead time, delayed delivery, high cost of OEM spares, obsolesce due to technology up gradation / change in design etc. Because of the criticality of the operations, most of the spares (frame components) of the Engines are made available from the OEM. But problem(s) faced when the OEM either discontinue the component supply/manufacture or change/ modify the design aspects of various components. This

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situation happens and can be envisaged in the machines of old vintage. The following is worth mentioning in this regard.

(i) The Waukesha L3711 model engines have been discontinued in the OEM’s production line and availability of major spares from the OEM have not been possible. Spares from other source(s) are also difficult and sometime not possible. Even if they are available, operation of machines with critical components from source(s) other than the OEM becomes unreliable. Nevertheless, as the units are of very old vintage, all these have been phased out.

(ii) The Atlas Copco (I) machines procured between 1988 to 1991 have already

undergone technology changes, such as design in compressor frame components, lube oil pump etc. It is apprehended that many such design modification and obsolescence are likely in future.

(iii) In the Worthington gas compressors, some components of compressor that were

fitted with the original compressors are no longer available and the new version (modified) of major components from the OEM cannot be readily used unless modifications are carried out. Besides, the cost has also been increased substantially.

(iv) With advancement of technology, more concern for safety aspects and efficient

control of operations, there have been remarkable changes in control philosophy of compressor packages across the globe. The electronic type control panels in place of earlier pneumatic type have now become most preferred option. Similar is the case with ignition system of the engines. The latest version of shielded type ignition system like Altronic or CPU 95 system in place of earlier Magtronic system has got wide acceptability across the industry. To keep pace with the latest development of technological changes, efforts are on to replace the old systems with the new systems in phased manner.

(v) The older version of IR Compressors (pre eighties) has been fitted with channel

type valves, which are no longer available with OEM. However these valves are being replaced with rugged and reliable metallic/nonmetallic plate or ring type valves.

(vi) The Waukesha model L5108 G engines has been discontinued in the manufacturer’s

production line, along with vital component like engine crankshaft etc. Unless other alternative source(s) are available for requisite spares, maintenance of the units will be difficult. Otherwise these engines will have to be replaced with other version of engines.

Thus, from the above few cases of non availability of components, especially critical ones from the OEM or any other reputed/ reliable source(s), availability of machines as desired cannot be maintained and down time cannot be avoided. Beside considerable time is wasted for exploring new vendor(s), cost incurred in procurement of spares is very high.

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TECHNOLOGY INDUCTION IN GAS COMPRESSOR OPERATIONS

OIL has so far acquired a large fleet of Gas Compressor Packages for boosting LP gas and supplying Gas Lift gas for oil winning purposes. Majority of these Gas Compressor packages are gas engine driven, while few are electric motor driven. Over the years there has been significant development in gas compression technology across the world on consideration of safety aspects and efficiency in control of operations. To keep pace with the latest development of technological changes, consistent efforts have been put in for induction of newer and latest technology in our operations. Two major technologies which have recently been inducted in our gas compression service are as below. 1.0 CPU-95 Ignition System The existing gas engines have either Magtronic or Altronic based Ignition system. These systems typically have mechanical components for triggering the spark needed for sustaining the ignition. Recent advances in ignition technology have led to the development of the Microprocessor Based Ignition System. Such systems incorporate a dedicated microprocessor which controls the release of the spark needed for the ignition to occur. The Altronic CPU-95 ignition system is such a microprocessor-based ignition system designed for application on natural gas fueled engines. The basic features of the system can be summarized as below.

A microprocessor-based, crankshaft referenced digital ignition system. The system features crankshaft-triggered timing accuracy and the capability to

vary timing electronically. The system is field-programmable and offers a variety of advanced control

methods. Comprehensive display capability Spark characteristic control Global and individual cylinder timing control Diagnostic capabilities and Serial communications The Display Module of the system enables the following System status and mode Normal running information Diagnostic messages Timing status Engine over speed set point

The CPU-95 features several advantages over the traditional magneto / alternator powered mechanically actuated ignition system.

a) Flexibility of use b) Better Diagnostic capabilities, which help to fix any problem easily and thus

reduce down-time.

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c) Better Timing Control and Fuel Efficiency which helps to boost engine performance and achievement of better emission norms.

d) Troubleshooting at the Field and diagnose a problem through a series of Fault Codes.

e) Easy Maintenance which eliminates complicated mechanical repair jobs requiring skilled technicians.

f) Enhanced Spark-Plug life due to the feature which makes it possible to vary the energy level of the Spark Plugs on the basis of requirement.

g) Multi-strike capability which helps to start difficult engines or hard start engines in cold weather conditions or with low cranking RPM.

Benefits derived with CPU 95 system over Altronic III system is as presented below.

Parameter Altronic III CPU 95 Results

Ignition principle

Self Alternator powered Mechanical drive

Microprocessor based digital ignition system

Reduce maintenance cost and downtime

Diagnostic No diagnostic feature

Directly communicating for real ignition Status

Fix the problem easily

Timing & fuel efficiency

Timing adjustment limitation

Real ignition timing control

exhaust emission are reduced

Troubleshoot at field

Takes more time Easy Reduce downtime

Timing control Fixed Can be varied depending upon the process condition

High Fuel efficiency helps the engine to run smoothly in optimized condition

Multi strike Single strike Multi Strike facility Easy start in all weather conditions

2.0 Electronic Control Panel :

The earlier gas compressor packages were supplied with pneumatic type Control Panels. With advancement of control philosophy, presently electronic type control panels in place of pneumatic type have now become most preferred option across the industry. Accordingly, all new compressor packages have now been procured with the most sophisticated and advanced Altronic Exacta Series XI Control Panels. Basis features and advantages of this Panel may be summarized as below. The system is pre-programmed and need only be configured and tuned for the

application resulting in greater “usability” and flexibility.

The Series XI Panels offers extensive data storage and trending capability. It can store up to 1400 data records, taken at user-selectable intervals (process

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variables, faults, shutdowns, etc.). 40 records are taken at 1 second intervals and stored prior to each shutdown

The Series XI series Panels offers advanced monitoring and control capability, including

Pre-lube Auto or manual start Warm-up Compressor loading/valve control Safety shutdown, alarm annunciation and monitoring Fast or auto-cool down Auto-depressurization (unloading) Post-lube

The Panel is equipped with Smart Analog and Digital I/O boards. An unlimited number of alarms and shutdowns can be added on each channel,

including normal high and low alarms and shutdowns, plus : Differentials Calculated Shutdowns Time Delayed Shutdowns

It records the date and time of each shutdown and stores this data for future

reference. In addition it takes a snapshot of all analog values at the time of shutdown.

Series XI Panels records data of all analog values for 39 intervals back in time prior

to the fault (usually 1 second apart). The Control Panel displays a combination of analog inputs, shutdowns, alarms,

recorded history, and events.

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WRITE-OFF PLAN OF COMPRESSOR PACKAGES For the reasons as explained in previous pages, quite a large number of Gas Compressor packages have been written off in past in phases. Further, few more packages are presently lying shut down for a long period of time and are beyond revival from economic point of view. Revival of these units will involve substantial cost and also, efficient and trouble free operation is unlikely. It is pertinent to mention in this context that as more and more thrust is given to meet gas supply commitment to the present & future consumer’s requirement, enhanced oil production and flare reduction in the fields, it is very essential to have only a healthy, reliable and efficient fleet of gas compressor units for un-interrupted operational availability. Apart from phasing out of 31 nos. compressor packages of Cooper Bessemer, Nouvo Pignone, C A Parson and BPCL make in late 80s / early 90s, 12 nos. packages in 2003, 4 nos. in 2004 and 35 nos. in 2012 have been written off from the list of holding. Thus a total of 82 compressor packages have so far been written off. The machines have been written off for one or more of the following reasons:

i) Ageing and crossing of normal /economic operational life ii) Unreliability in operation / acute operational problems due to inherent design flaws iii) High frequency of breakdown/shutdown and high maintenance efforts iv) Long shutdown machines beyond economic repairing / revival v) Spares constraints vi) Low efficiency with high degree maintenance costs/efforts.

Details of written off compressor units are shown in enclosed Annexure II Under this evaluation based on health, spares availability, running hours covered life cycle, poor operational condition, remote chance of revival and other factors as stated above, 23 units are now earmarked and proposed for written off during the next 4 years in phased manner. The write off will be done in two phases.

i) Phase I - Presently seven (7) nos. electric motor driven Gas Compressors (4 Gas Lifters & 3 L.P Boosters) are in operation in GCS-1, GCS-7 and GCS-8. Further one (1) motor driven GL compressor in GCS 7 is presently shutdown for compressor problem. Because of the prevailing constraints in electric power availability in the captive Power Plant in Duliajan, restriction in operations of these units has become necessary which affects operational requirement. Off late, the issue has gained much importance due to steep rise in electrical load, especially in the summer, which restricts operation of the units. Therefore these electric motor drive units have been proposed for write off in 2015-16. Budget approval for procurement of replacement units has already been obtained. Further, 6 units (4 nos. IR (C) and 2 nos. BPCL), which were procured in 1976 / 1979, are presently in operation in much reduced efficiency and increased breakdown rate because of long vintage and operational run. These 6 units are also proposed for write off during 2015-16.

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However after written off the above 14 units, the units will be kept as standby as far as possible so long as spares consumption is moderate and maintenance cost / efforts are minimal.

ii) Phase II – Eight (8) units, which are of 1985 and earlier vintage, have already crossed economical operating life and presently are in operating condition with much reduced efficiency, high breakdown rate and increased maintenance efforts and costs. These units have also been proposed to write off in 2016-17 in the second phase.

Details of the units proposed for written off indicating make, type, vintage, phase out plan, cumulative running hours are presented in Annexure-III.

5.4 Out of total 22 units proposed for written off, 13 units are Booster Compressors and 9 units are Lifter Compressors. Make and type of compressors of these are stated in the Table below.

Sr No Make / Model Quantity Total 1 IR (C) – Wau L 5790 1 No. IR (C) – 4 Nos.

IR (C) – Wau L 7042 3 Nos. 2 IR (I) – Electric Motor 9 Nos. IR (I) – 14 Nos.

IR (I) – Wau 5108 3 Nos. IR (I) – Wau 7042 2 Nos.

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BPCL – Electric Motor 2 Nos. BPCL – 4 Nos. BPCL – Wau L 7042 2 Nos.

5.5 Station wise holding of Gas Compressors after phasing out of 14 units in first phase (2015-16) and 8 units in second phase (2016-17) together with installed boosting / lifting capacities are presented in enclosed Annexure IV.

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AUGMENTATION OF COMPRESSOION INFRASTRUCTURE In the present and future thrust for meeting gas supply commitment, reduction of gas flare to a bare minimum level, and for augmentation of crude oil production from artificial lift wells, adequate no. of compressors, both L.P Booster and Gas Lifter need to be catered to avert operational interruption/downtime in the existing installations, and also to create additional infrastructures in the new areas.

Existing Installations / Areas : With phasing out a number of compressor packages in recent times and also considering the proposed write off plan till 2016-17, the availability scenario of compression infrastructure in existing areas is shown in Annexure V. It is worth mentioning here that the actual operating capacity becomes much less than designed capacity for varied makes of compressors because of various reasons like safe maximum operating speed, temperature effect and effect due to lower suction pressure etc. Therefore these de-rating factors have been considered while calculating total available capacity of the operating compressors.

Considering the availability scenario of compression infrastructure in existing areas as detailed in Annexure V, augmentation of gas compression facility is required to be made in the following installations as bare minimum requirement by 2015-16.

CATEGORY INSTALLATION QUANTITY TOTAL L.P.B COMPRESSORS (2.5 MMSCFD capacity)

GCS 1 1 10 Nos. GCS 5 1 GCS 8 3 GCS Kathalguri 1 GCS Ushapur 1 GCS Nagajan 1 GCS Moran 2

GAS LIFT COMPRESSORS GCS 1 1 7 Nos. GCS 2 / 6 / 8 3 GCS Ushapur 1 GCS K’Guri / L’kasi 1 GCS J’Jan / N’Jan 1

While assessing the above requirement, the following considerations / assumptions have been taken into account.

a) There shall be no change in gas profile for the next 3 / 4 years and as such, current low pressure gas availability and gas lift gas consumption in a particular area will remain same.

b) The proposed write off plan of the compressor packages as stated earlier.

20

c) Presently there are 19 nos. of Worthington make compressor packages which were installed in 1986. Off late, due to normal fatigue and wear & tear, these packages have been showing ageing effect and therefore breakdown frequency is on increasing trend. To cope up with increased breakdown and long shutdown duration, additional compressor packages have been proposed to be installed in critical areas / installations in order to curtail flare and maintenance of gas lift pressure.

New Installations / Areas : With continued thrust on oil exploration and production activities, development of gas compression facility is required to be taken up as and where required in order to pickup and utilize the produced gas so as to avoid flare. Presently, creation of full fledged gas compression facility in Makum, Dikom and Tengakhat area is planned and the project will be executed by Production Project department. However, action has already been initiated by the department to set up gas compression facility in Tengakhat area on temporary basis by relocating one (1) no. LPB compressor from Kathalguri GCS and one (1) no. Gas Lift compressor from Moran GCS. Similar temporary GCS is already in operation in Dikom. Additionally, outsourcing of compression service under BOO concept has been planned in two more locations. Further, compressor stations at Baghjan and Barekuri are also planned as a long time measure.

_________________________

21

HIRING OF COMPRESSION SERVICE

With the development of gas compression infrastructures in various operational areas over the time, it has been possible to pick up and utilize the produced gas with gradual reduction of flare over the years. However there is still scope to arrest flare. The main challenges for flare reduction are as below:

Long lead time for construction of full fledged Gas Compressor Station as it takes considerable time to develop and establish a field.

Long lead time for material procurement specially the Gas Compressor packages and also due to the fact that most of the high cost equipment for natural gas processing has to be sourced from abroad.

Locational disadvantage, difficult logistics, difficulty in land procurement, space constrains, quantum of gas availability etc. are also some of the other constraints in developing full fledged Gas Compressor Stations.

To mitigate the above challenges, the department has taken proactive decisive measures to reduce flare with introduction of BOO (Build Own Operate) concept for outsourcing of compression service in six locations where compression infrastructures / facilities are not available. The contract was awarded to M/s Assam Air Products Limited on 23rd June 2010 for developing infrastructure and providing compression service in six locations namely Bhogpara, Dikom, Makum, HJC (Chabua), Barekuri and Hatiali. All the above six installations was put into operation in May 2011, initially with one (1) compressor packages in each installation. Subsequently, compression capacity was augmented in three installations, namely Makum in 2012, Dikom in 2013 and Hatiali in 2013 with addition of one (1) more compressor packages in each installation. Details of the above installation are stated below.

Sr. No. Installation Unit Compression Capacity Date of Commissioning 1 Dikom Package 1 40000 SCMD 09.05.2011

Package 2 40000 SCMD 30.06.2013 2 Chabua Package 1 20000 SCMD 10.05.2011 3 Barukuri Package 1 20000 SCMD 15.05.2011 4 Bhogpara Package 1 20000 SCMD 15.05.2011 5 Hatiali Package 1 40000 SCMD 11.05.2011

Package 2 40000 SCMD 12.07.2013 6 Makum Package 1 40000 SCMD 12.05.2011

Package 2 40000 SCMD 13.11.2012 Since commissioning till 31st March, 2013, a total of 86.3 MMSCM of low pressure gas, which was otherwise flared earlier, has been compressed in the above installations and fed into distribution network, resulting in reduction of flare substantially.

22

CONCLUSION

The current fleet of operating Gas Compressors in our field were installed at different times starting from 1972. Out of the entire fleet, the average vintage of 22 units is 35 years, 54 units is 25 years, 30 units is 15 years and 13 units is 5 years. As such almost 65 % of total available units are of vintage more than 25 years. In this context it is worth mentioning that it is very essential to have only a healthy, reliable and efficient fleet of gas compressor units for un-interrupted operational availability. Keeping this in mind, the department has taken adequate steps for skill and competency development of the engineers / employees by imparting requisite training, induction of new proven technologies for operational efficiency, efficient spares management practices, cost reduction / control measures etc. Action for write off of old vintage compressors and procurement of replacement packages has also been initiated by the department. Further, the department has taken decisive measures to reduce flare by introducing BOO (Build Own Operate) concept for outsourcing of compression service in 6 locations where compression infrastructures / facilities are not available. ACKNOWLEDGEMENT : Inputs provided by the departmental colleagues greatly helps in preparation of this note and the under signer takes this opportunity to acknowledge the help and assistance received from all concerned. Further, guidance and supports provided by GMP (Gas) i/c in preparation of this note is also gratefully acknowledged.

Susanta Kumar Sarmah CEPG (O&M) Production Gas Department

*****************************

TOTA

L HO

LDIN

G O

F GA

S CO

MPR

ESSOR

S AS O

N 1ST A

PRIL, 2013

ANN

EXUR

E I

Rated C

apacity

Com

pressorPrim

e Mover

MM

SCM

D

1LP

B 4

IR (I)

Motor

1301983

1345644000001365

2LP

B 5

WO

RTH

Cat G

39965

1986173355

4000001034

3LP

B 6

AC

Wau-L7042

1301989

1598774000002010

4G

L 5B

PC

LM

otor76

1990189744

4000008237

5G

I 4A

tlas Copco

Wau-L5790

701991

853564000001013

6G

L 6B

PC

LC

at 351676

20120

N/A

Under com

missioning

7LP

B 5

AC

Wau-L7042

1301990

1580934000001398

8LP

B 6

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

9LP

B 7

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

10G

L/GI

GI 3

Atlas C

opcoW

au-L579070

1992119444

4000001002

11LP

B 3

AC

Wau-L7042

1301989

1624324000001011

12LP

B 4

AC

Wau-L7042

1301992

1693454000001094

13LP

B 5

BP

CL

Wau-L5790

1301996

1563634000000175

14G

L 3IR

(C)

Wau-L5790

761976

1818914000004476

15G

L 6A

tlas Copco

Wau-L5108

761992

1494964000000091

16G

I 1A

tlas Copco

Wau-L7042

701989

1277374000002037

17G

I 2A

tlas Copco

Wau-L5790

701992

1199114000001006

18LP

B 1

IR (C

) W

au-L7042130

197652944

N/A

Inv. No. N

K-5075

19LP

B 4

Worth

Cat G

39965

1986193297

4000001182

20LP

B 5

AC

Wau-L7042

1301990

1369604000003461

21LP

B 2

IRC

Wau-L7042

1301976

1261614000001928

22LP

B 3

AC

Wau-L7042

1301989

1283814000001897

23LP

B 4

AC

Wau-L7042

1301989

1443574000001903

24G

L 7A

tlas Copco

Cat G

39976

1991136522

N/A

25G

I 1A

tlas Copco

Wau-L7042

701990

1170074000001209

26G

I 2A

tlas Copco

Wau-L5790

701992

1387604000003577

27LP

B 2

BP

CL

Wau-L7042

1301979

1270574000001996/97

28LP

B 3

IR(I)

Motor

1301984

77568N

/AS

/D

29LP

B 4

IR(I)

Motor

1301985

986864000001364

30G

L 2IR

(I)M

otor76

1983134210

4000001057

31G

L 3IR

(I)M

otor76

198313604

4000001059

32G

L 4IR

(I)W

au-L510876

1985N

/AN

/AS

/D

GL/G

I

LPB

4

LPB1

VintageC

um R

/hrs (up to M

ar'13)A

sset No.

LPB

LPB

GL/G

I

56LPB

GL/G

I

7LPB

GL/G

I

Rem

arks

2

GC

SD

utyU

nit No.

Unit D

etailSr N

o

TOTA

L HO

LDIN

G O

F GA

S CO

MPR

ESSOR

S AS O

N 1ST A

PRIL, 2013

ANN

EXUR

E I

Rated C

apacity

Com

pressorPrim

e Mover

MM

SCM

D

VintageC

um R

/hrs (up to M

ar'13)A

sset No.

Rem

arksG

CS

Duty

Unit N

o.U

nit Detail

Sr No

33LP

B 2

BP

CL

Wau-L7042

1301979

1544574000002053

34LP

B 3

IR(I)

Motor

1301984

1011054000002047

35G

L 1W

orthingtonC

at G399

761986

2008104000004473

36G

L 3B

PC

LM

otor76

199197229

N/A

37G

L 4B

PC

LC

at 352176

20120

N/A

Under com

missioning

38LP

B 2

Worthington

Cat G

39965

1986127365

4000001217

39LP

B 3

Worthington

Cat G

39965

1986161108

N/A

40LP

B 7

Atlas C

opcoW

au-L7042130

1992119665

4000001207

41G

L 1IR

(I) W

au-L510876

198673582

N/A

S/D

42G

L 3B

PC

LW

au-L510876

1989130168

4000001906

43G

S 1

Atlas C

opcoW

au-L579070

1994116408

4060007924

44G

S 2

Atlas C

opcoW

au-L579070

1994105354

4060007923

45LP

B 1

IR (C

) W

au-L7042130

1976113652

4000001928

46LP

B 2

Worthington

Cat G

39965

1986165040

4000001133

47LP

B 3

Worthington

Cat G

39965

1986155412

4000001127

48LP

B 4

Worthington

Cat G

39965

1986163819

4000001136

49LP

B 5

Atlas C

opcoW

au-L7042130

1991124059

N/A

50G

L 1IR

(I) W

au-L510876

198399141

4000001149

51G

L 2W

orthingtonC

at G399

761986

2022674000003630

52G

L 3A

tlas Copco

Cat G

39976

1989147599

4000001103

53G

L 4A

tlas Copco

Cat G

39976

1992137275

4000003573

54LP

B 1

Worthington

Cat G

39965

1986118273

4000001036

55LP

B 2

Worthington

Cat G

39965

1986134657

4000001035

56LP

B 3

Atlas C

opcoW

au-L7042130

1991139926

4000001401

57G

L 1W

orthingtonC

at G399

761986

2011404000001039

58G

L 2IR

(I) W

au-L510876

198472306

4000001043

59G

L 3A

tlas Copco

Cat G

39976

1989141477

N/A

60LP

B 1

Worth

Cat G

39965

1986141826

4000001089

61LP

B 2

AC

Wau-L7042

1301989

1115464000001069

62G

L 1B

PC

LW

au-L510876

1989103810

4000001472

63G

L 2A

tlas Copco

Cat G

39976

1989146559

4000001063

64LP

B 1

Atlas C

opcoW

au-L7042130

199295894

4000001155

GL

JRN

GL / G

I

8LPB

K'G

UR

ILPB

GL/G

S

LPB

LPB

N'JA

NLPB

GL

U'PU

R

GL/G

I

L'KA

SHI

LPB

TOTA

L HO

LDIN

G O

F GA

S CO

MPR

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S AS O

N 1ST A

PRIL, 2013

ANN

EXUR

E I

Rated C

apacity

Com

pressorPrim

e Mover

MM

SCM

D

VintageC

um R

/hrs (up to M

ar'13)A

sset No.

Rem

arksG

CS

Duty

Unit N

o.U

nit Detail

Sr No

65LP

B 2

Worthington

Cat G

39965

1986157010

4000003314

66LP

B 3

Atlas C

opcoW

au-L7042130

1991134481

4000001389

67LP

B 4

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

68G

L 1A

tlas Copco

Wau-L5108

761993

1092014000003559

69G

L 2A

tlas Copco

Wau-L5108

761994

121255N

/A

70LP

B 1

Atlas C

opcoW

au-L7042130

1993144684

4000001097

71LP

B 2

BP

CL

WauL5790

1301996

22024N

/AN

K-15781

72G

L 1A

tlas Copco

Wau-L5108

761992

1522664000003563

73G

L 2A

tlas Copco

Wau-L5108

761992

1567304000003561

74G

L 3B

PC

LC

at 351676

20120

N/A

Under com

missioning

75LP

B 1

IR(I)

Wau-L7042

1301996

1292634000000055

76LP

B 2

IR(I)

Wau-L7042

1301996

1107654000000057

77LP

B 3

Atlas C

opcoW

au-L7042130

1989136289

4000001527

78LP

B 4

Atlas C

opcoW

au-L7042130

1989130462

4000002010

79G

L 1B

PC

LW

au-L510876

199692956

4000000053

80G

L 2B

PC

LW

au-L510876

199694007

4000000059

81G

L 3A

tlas Copco

Cat G

39976

1996115191

4000003574

82G

L 4A

tlas Copco

Wau-L5790

701994

620604000001004

83G

S 5

Atlas C

opcoW

au-L579070

1994N

/AN

/A

84LP

B 1

Atlas C

opcoW

au-L7042130

1993114188

4000003496

85LP

B 2

BP

CL

Wau-L7042

1302000

684664000004730

86LP

B 3

Atlas C

opcoW

au-L7042130

2000100906

N/A

87LP

B 4

BP

CL

Cat G

3516G65

200536436

N/A

88LP

B 5

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

89G

L 1A

tlas Copco

Wau-L5108

701991

862844000003557

90G

L 2B

PC

LW

au-L510876

200088921

4000004733

91G

L 3A

tlas Copco

Wau-L5790

762000

848024060018404

92G

L 4B

PC

LC

at 3516G76

200544082

N/A

93G

L 5B

PC

LC

at 351676

20120

N/A

Under com

missioning

94LP

B 1

Worthington

Cat G

39965

1986170190

4000004730

95LP

B 2

Worthington

Cat G

39965

1986174892

4000004731

96G

LG

L 1W

orthingtonC

at G399

761989

768434000004733

LPB

GL

S'MA

RI

GL/G

S

J'PUR

DIK

OM

LPB

GL

LPB

K'LO

NI

GL

LPB

TOTA

L HO

LDIN

G O

F GA

S CO

MPR

ESSOR

S AS O

N 1ST A

PRIL, 2013

ANN

EXUR

E I

Rated C

apacity

Com

pressorPrim

e Mover

MM

SCM

D

VintageC

um R

/hrs (up to M

ar'13)A

sset No.

Rem

arksG

CS

Duty

Unit N

o.U

nit Detail

Sr No

97LP

B 1

IR(I)

Motor

651982

865044000003505

98LP

B 2

IR(I)

Motor

651983

1347104000003508

99LP

B 3

IR(I)

Wau-L7042

1301983

1397594000003492

100LP

B 4

IR(I)

Wau-L7042

1301985

1416044000003501

101LP

B 5

Worth

Cat G

39965

1989175021

4000001049

102LP

B 6

AC

Wau-L7042

1301991

1677704000003502

103LP

B 7

AC

Wau-L7042

1301991

1242644000003500

104G

L 2IR

(I) M

otor76

1983145332

4000003514

105G

L 3W

orthingtonC

at G399

761986

1372914000001128

106G

L 4B

PC

LW

au-L510876

1988114136

N/A

Inv. No. N

K-15089

107G

L 5A

tlas Copco

Cat G

39976

1989109901

4000001168/69

108G

L 6A

tlas Copco

Cat G

39976

1992101626

4000003567Inv. N

o. NK

-14652

109G

L 7A

tlas Copco

Wau-L5108

761993

15115741000001204

110LP

B 1

BP

CL

Wau-L7042

1301996

706374000000053

111LP

B 2

IR(I)

Wau-L7042

1301996

822814000000052

112LP

B 3

Atlas C

opcoW

au-L7042130

198956853

4000000037

113LP

B 4

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

114LP

B 5

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

115G

L 1B

PC

LW

au-L510876

199678999

4000000101

116G

L 2B

PC

LW

au-L510876

199690023

4000000102

117G

L 3A

tlas Copco

Wau-L5108

761991

508914060000000

118G

L 4B

PC

LC

at 3516G76

200533268

4060019333

119G

L 5A

tlas Copco

Cat G

39976

1989179467

N/A

LPB62 N

os.

GL

57 Nos.

TOTA

L119 N

os.

TOTA

L HO

LDIN

G IN

2012-13

H'JA

N

GL

MR

N-2

LPB

GL/G

I

LPB

PHASING OUT OF COMPRESSOR PACKAGES ANNEXURE - II

Compr. Prime Mover

GI NP YSC 206/2ap 1967 1989-90

GI NP YSC 206/2ap 1967 1989-90

GI NP YSC 206/2ap 1967 1989-90

LPB NP YSC 206/2ap 1967 1989-90

GL NP YSC 206/2ap 1967 1989-90

3 LPB NP YSC 206/2ap 1967 1989-90

GI NP YSC 206/2ap 1967 1989-90

LPB NP YSC 206/2ap 1967 1989-90

GI NP YSC 206/2ap 1966 1989-90

LPB NP YSC 206/2ap 1967 1989-90

LPB NP YSC 206/2ap 1967 1989-90

MRN 1 GI NP YSC 206/2ap 1966 1989-90

GI NP YSC 206/2ap 1966 N/A

GR NP YSC 206/2ap 1966 N/A

GI C. Bessemer Wau-F 1905 1962 N/A

GI C. Bessemer Wau-F 1905 1962 N/A

2 GI NP YSC 206/2ap 1967 N/A

3 GL CA Parson Roles Royce 1966 N/A

GI NP YSC 206/2ap 1967 N/A

LPB NP YSC 206/2ap 1967 N/A


6 GI NP YSC 206/2ap 1966 N/A


1 GI NP YSC 206/2ap 1966 1994-95

GL NP YSC 206/2ap 1967 1994-95

GL NP YSC 206/2ap 1967 1994-95

4 GL NP YSC 206/2ap 1967 1994-95

5 GL CA Parson Roles Royce 1966 1994-95

GL NP YSC 206/2ap 1967 1994-95

GL NP YSC 206/2ap 1967 1994-95

7 GL BPCL Wau-L3711 1975 1994-95

1 LPB1 IR (C) Wau-L3711 1974 2003-04

LPB1 IR (C) Wau-L3711 1974 2003-04

GI 1 IR (C) Wau-L3711 1974 2003-04

LPB 1 IR (C) Wau-L3711 1974 2003-04

GL 1 IR (C) Wau-L3711 1974 2003-04

GL 2 BPCL Wau-L3711 1979 2003-04

4 GL2 IR (C) Wau-L3711 1976 2003-04

LPB 1 IR (C) Wau-L3711 1976 2003-04

GL4 IR (C) Wau-L3711 1976 2003-04

GL5 IR (C) Wau-L3711 1976 2003-04

LPB3 IR (C) Wau-L3711 1976 2003-04

GL 1 IR (C) Wau-L3711 1976 2003-04

1 LPB3 IR (C) Wau-L7042 1976 2004-05

LPB 2 BPCL Motor 1985 2004-05

5 LPB1 IR (C) Wau-L7042 1976 2004-05

K'GURI LPB 1 BPCL Wau-L7042 1979 2004-05

A/Cs/51/12/026/04-05 dated 06.12.2004

A/Cs/51/12/533/02-03 dated 20.05.2003

Write Off ReferenceGCS Unit No. Unit Detail Vintage

2

1 Write off approval reference not tracable

A/Cs:51/12/11/94-95 dated 14.06.1994

Phase out Year

3. Written Off during 2004-05

4

6

A/Cs-54-593/89 dated 29.09.1989

4

3

MRN 1

1. Written off during 1989 to 1994

3

2

6

2. Written Off during 2003 - 04

6

2

PHASING OUT OF COMPRESSOR PACKAGES ANNEXURE - II

Compr. Prime Mover

Write Off ReferenceGCS Unit No. Unit Detail Vintage Phase out Year

LPB2 IR (C) Wau-L3712 1974 2012-13

GL1 IR (C) Wau-L3711 1974 2012-13

GL2 IR (C) Wau-L3711 1976 2012-13

GL3 BPCL Wau-L3711 1979 2012-13

GL 4 IR(I) Motor 1977 2012-13

GI 1 BPCL Motor 1990 2012-13

GI 2 BPCL Motor 1990 2012-13

LPB2 IR (C) Wau-L3711 1976 2012-13

GL3 IR (C) Wau-L3711 1974 2012-13

GL4 IR (C) Wau-L3711 1974 2012-13

GL5 IR (C) Wau-L3521 1974 2012-13

LPB 3 KGK Motor 1983 2012-13

GL 3 IR( (I) Motor 1983 2012-13

LPB 1 BPCL Wau-L7042 1979 2012-13

LPB2 KGK Motor 1985 2012-13

GL2(N) IR (C) Wau-L3711 1973 2012-13

GL4 KGK Motor 1986 2012-13

LPB2 BPCL Wau-L3711 1979 2012-13

LPB 3 BPCL Motor 1976 2012-13

GL3 IR (C) Wau-L3711 1974 2012-13

GL 6 IR (C) Wau 5790 1976 2012-13

LPB1 KGK JANBACHER 1988 2012-13

GL5 KGK Motor 1988 2012-13

GI 1 BPCL Motor 1978 2012-13

GI 2 IR (I) Motor 1985 2012-13

LPB1 IR (C) Wau-L3711 1976 2012-13

GL 2 IR (C) Wau L3711 1975 2012-13

J'JAN GI 1 BPCL Wau L3521 1989 2012-13

U'PUR GI 1 BPCL Wau L3521 1989 2012-13

LPB1 IR (C) Wau-L3711 1973 2012-13

LPB2 IR (C) Wau-L3711 1974 2012-13

GL3 IR (C) Wau-L3711 1974 2012-13

GI 1 IR (C) Wau-L 5790 1972 2012-13

GL 1 IR (I) Motor 1977 2012-13

GI 1 BPCL Motor 1977 2012-13

A/cs:51/12/025/2012-13 dated 10.10.2012

7

8

MRN - 1

MRN 2

3

4. Written Off during 2012- 131

2

4

5

6

PRO

POSED

PHA

SE OU

T PLAN

OF LP B

OO

STER A

ND

GL D

UTY C

OM

PRESSO

R

ANN

EXUR

E - III

Com

pr.Prim

e Mover

LPB

4IR

(I) M

otor130

1983O

perating2015-16

134564P

roposed for electric power constraint in P

ower H

ouse

GL 5

BP

CL

Motor

761990

Operating

2015-16189744

Proposed for electric pow

er constraint in Pow

er House

4G

L 3IR

(C)

Wau-L5790

761976

Operating

2015-16181891

Long vintage. Operates w

ith low efficiency.

5LP

B1

IR (C

)W

au-L7042130

1976O

perating2015-16

52944Long vintage. O

perates with low

efficiency.

6LP

B 2

IR (C

) W

au-L7042130

1976O

perating2015-16


perates with low

efficiency.

LPB

2B

PC

LW

au L7042130

1979O

perating2015-16


perates with low

efficiency.

LPB

3IR

(I) M

otor130

1984S

/d2015-16

77568P


ower H

ouse

LPB

4IR

(I) M

otor130

1985O

perating2015-16

98686P


ower H

ouse

GL 2

IR (I)

Motor

761983

Operating

2015-16134210



er House

GL 3

IR (I)

Motor

761983

Operating

2015-1613604



er House

GL 4

IR(I)

Wau-L5108

761985

S/d

2016-17N

/ALong vintage. P

resently shut down for engine problem

.

LPB

2B

PC

LW

au L7042130

1979O

perating2015-16


perates with low

efficiency.

LPB

3IR

(I) M

otor130

1984O

perating2015-16

101105P


ower H

ouse

GL 3

BP

CL

Motor

761991

Operating

2015-1697229



er House

LPB

1IR

(C)

Wau L7042

1301976

Operating

2015-16113652

Long vintage. Operates w

ith low efficiency.

GL 1

IR (I)

Wau-L5108

761983

Operating

2016-1799141

Operates w

ith low efficiency &

high breakdown

U'P

UR

GL 2

IR (I)

Wau-L5108

761984

Operating

2016-1772306

Operates w


high breakdown

LPB

1IR

(I)M

otor65

1982O

perating2016-17

86504O

perates with low

efficiency & high breakdow

nLP

B 2

IR(I)

Motor

651983

Operating

2016-17134710

Operates w


high breakdown

LPB

3IR

(I)W

au-L7042130

1983O

perating2016-17

139759O

perates with low

efficiency & high breakdow

nLP

B 4

IR(I)

Wau-L7042

1301985

Operating

2016-17141604

Operates w


high breakdown

GL 2

IR (I)

Motor

761983

Operating

2016-17145332

Operates w


high breakdown

2nd Phase (2016-17) - 8 Nos.

TOTA

L UN

ITS TO W

RITE O

FF - 23 Nos.

MR

N - 2

1st Phase (2015-16) - 14 Nos.

78

J'JAN

Phase out plan (Yr.)

Cum

R/hrs (upto

Mar'13)

Rem

arks

1

GC

SU

nit No.

Unit D

etailR

ated C

apacity M

SCM

D

VintagePresent Status

TOTA

L HO

LDIN

G O

F GA

S CO

MPR

ESSOR

S AFTER

PRO

POSED

WR

ITE OFF

ANN

EXUR

E IVR

ated Capacity

Com

pressorPrim

e Mover

MM

SCM

D

1LP

B 5

WO

RTH

Cat G

39965

1986173355

4000001034

2LP

B 6

AC

Wau-L7042

1301989

1598774000002010

3G

I 4A

tlas Copco

Wau-L5790

701991

853564000001013

4G

L 6B

PC

LC

at 351676

20120

N/A

Under com

missioning

5LP

B 5

AC

Wau-L7042

1301990

1580934000001398

6LP

B 6

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

7LP

B 7

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

8G

L/GI

GI 3

Atlas C

opcoW

au-L579070

1992119444

4000001002

9LP

B 3

AC

Wau-L7042

1301989

1624324000001011

10LP

B 4

AC

Wau-L7042

1301992

1693454000001094

11LP

B 5

BP

CL

Wau-L5790

1301996

1563634000000175

12G

L 6A

tlas Copco

Wau-L5108

761992

1494964000000091

13G

I 1A

tlas Copco

Wau-L7042

701989

1277374000002037

14G

I 2A

tlas Copco

Wau-L5790

701992

1199114000001006

15LP

B 4

Worth

Cat G

39965

1986193297

4000001182

16LP

B 5

AC

Wau-L7042

1301990

1369604000003461

17LP

B 3

AC

Wau-L7042

1301989

1283814000001897

18LP

B 4

AC

Wau-L7042

1301989

1443574000001903

19G

L 7A

tlas Copco

Cat G

39976

1991136522

N/A

20G

I 1A

tlas Copco

Wau-L7042

701990

1170074000001209

21G

I 2A

tlas Copco

Wau-L5790

701992

1387604000003577

22G

L 1W

orthingtonC

at G399

761986

2008104000004473

23G

L 4B

PC

LC

at 352176

20120

N/A

Under com

missioning

24LP

B 2

Worthington

Cat G

39965

1986127365

4000001217

25LP

B 3

Worthington

Cat G

39965

1986161108

N/A

26LP

B 7

Atlas C

opcoW

au-L7042130

1992119665

4000001207

27G

L 1IR

(I) W

au-L510876

198673582

N/A

S/D

28G

L 3B

PC

LW

au-L510876

1989130168

4000001906

29G

S 1

Atlas C

opcoW

au-L579070

1994116408

4060007924

30G

S 2

Atlas C

opcoW

au-L579070

1994105354

4060007923

31LP

B 2

Worthington

Cat G

39965

1986165040

4000001133

32LP

B 3

Worthington

Cat G

39965

1986155412

4000001127

33LP

B 4

Worthington

Cat G

39965

1986163819

4000001136

34LP

B 5

Atlas C

opcoW

au-L7042130

1991124059

N/A

JRN 8 4

Asset N

o.

LPB

GL/G

I

GL

LPB

LPB

GL/G

I

56LPB

GL/G

I

Rem

arks

2

GC

SD

utyU

nit No.

Unit D

etail

LPB1

VintageC

um R

/hrs (up to M

ar'13)

GL/G

S

LPB

K'G

UR

ILPB

Sr No

TOTA

L HO

LDIN

G O

F GA

S CO

MPR

ESSOR

S AFTER

PRO

POSED

WR

ITE OFF

ANN

EXUR

E IVR

ated Capacity

Com

pressorPrim

e Mover

MM

SCM

D

Asset N

o.R

emarks

GC

SD

utyU

nit No.

Unit D

etailVintage

Cum

R/hrs (up to

Mar'13)

Sr No

35G

L 2W

orthingtonC

at G399

761986

2022674000003630

36G

L 3A

tlas Copco

Cat G

39976

1989147599

4000001103

37G

L 4A

tlas Copco

Cat G

39976

1992137275

4000003573

38LP

B 1

Worthington

Cat G

39965

1986118273

4000001036

39LP

B 2

Worthington

Cat G

39965

1986134657

4000001035

40LP

B 3

Atlas C

opcoW

au-L7042130

1991139926

4000001401

41G

L 1W

orthingtonC

at G399

761986

2011404000001039

42G

L 3A

tlas Copco

Cat G

39976

1989141477

N/A

43LP

B 1

Worth

Cat G

39965

1986141826

4000001089

44LP

B 2

AC

Wau-L7042

1301989

1115464000001069

45G

L 1B

PC

LW

au-L510876

1989103810

4000001472

46G

L 2A

tlas Copco

Cat G

39976

1989146559

4000001063

47LP

B 1

Atlas C

opcoW

au-L7042130

199295894

4000001155

48LP

B 2

Worthington

Cat G

39965

1986157010

4000003314

49LP

B 3

Atlas C

opcoW

au-L7042130

1991134481

4000001389

50LP

B 4

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

51G

L 1A

tlas Copco

Wau-L5108

761993

1092014000003559

52G

L 2A

tlas Copco

Wau-L5108

761994

121255N

/A

53LP

B 1

Atlas C

opcoW

au-L7042130

1993144684

4000001097

54LP

B 2

BP

CL

WauL5790

1301996

22024N

/A

55G

L 1A

tlas Copco

Wau-L5108

761992

1522664000003563

56G

L 2A

tlas Copco

Wau-L5108

761992

1567304000003561

57G

L 3B

PC

LC

at 351676

20120

N/A

Under com

missioning

58LP

B 1

IR(I)

Wau-L7042

1301996

1292634000000055

59LP

B 2

IR(I)

Wau-L7042

1301996

1107654000000057

60LP

B 3

Atlas C

opcoW

au-L7042130

1989136289

4000001527

61LP

B 4

Atlas C

opcoW

au-L7042130

1989130462

4000002010

62G

L 1B

PC

LW

au-L510876

199692956

4000000053

63G

L 2B

PC

LW

au-L510876

199694007

4000000059

64G

L 3A

tlas Copco

Cat G

39976

1996115191

4000003574

65G

L 4A

tlas Copco

Wau-L5790

701994

620604000001004

66G

S 5

Atlas C

opcoW

au-L579070

1994N

/AN

/A

67LP

B 1

Atlas C

opcoW

au-L7042130

1993114188

4000003496

68LP

B 2

BP

CL

Wau-L7042

1302000

684664000004730

GL / G

I

LPB

S'MA

RI

GL/G

S

J'PUR

LPB

N'JA

N

GL

LPB

GL

U'PU

R

GL/G

I

L'KA

SHI

GL

LPB

K'LO

NI

LPB

LPB

TOTA

L HO

LDIN

G O

F GA

S CO

MPR

ESSOR

S AFTER

PRO

POSED

WR

ITE OFF

ANN

EXUR

E IVR

ated Capacity

Com

pressorPrim

e Mover

MM

SCM

D

Asset N

o.R

emarks

GC

SD

utyU

nit No.

Unit D

etailVintage

Cum

R/hrs (up to

Mar'13)

Sr No

69LP

B 3

Atlas C

opcoW

au-L7042130

2000100906

N/A

70LP

B 4

BP

CL

Cat G

3516G65

200536436

N/A

71LP

B 5

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

72G

L 1A

tlas Copco

Wau-L5108

701991

862844000003557

73G

L 2B

PC

LW

au-L510876

200088921

4000004733

74G

L 3A

tlas Copco

Wau-L5790

762000

848024060018404

75G

L 4B

PC

LC

at 3516G76

200544082

N/A

76G

L 5B

PC

LC

at 351676

20120

N/A

Under com

missioning

77LP

B 1

Worthington

Cat G

39965

1986170190

4000004730

78LP

B 2

Worthington

Cat G

39965

1986174892

4000004731

79G

LG

L 1W

orthingtonC

at G399

761989

768434000004733

80LP

B 5

Worth

Cat G

39965

1989175021

4000001049

81LP

B 6

AC

Wau-L7042

1301991

1677704000003502

82LP

B 7

AC

Wau-L7042

1301991

1242644000003500

83G

L 3W

orthingtonC

at G399

761986

1372914000001128

84G

L 4B

PC

LW

au-L510876

1988114136

N/A

Inv. No. N

K-15089

85G

L 5A

tlas Copco

Cat G

39976

1989109901

4000001168/69

86G

L 6A

tlas Copco

Cat G

39976

1992101626

4000003567Inv. N

o. NK

-14652

87G

L 7A

tlas Copco

Wau-L5108

761993

1511574000001204

88LP

B 1

BP

CL

Wau-L7042

1301996

706374000000053

89LP

B 2

IR(I)

Wau-L7042

1301996

822814000000052

90LP

B 3

Atlas C

opcoW

au-L7042130

198956853

4000000037

91LP

B 4

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

92LP

B 5

BP

CL

Wau 5790

652012

0N

/AU

nder comm

issioning

93G

L 1B

PC

LW

au-L510876

199678999

4000000101

94G

L 2B

PC

LW

au-L510876

199690023

4000000102

95G

L 3A

tlas Copco

Wau-L5108

761991

508914060000000

96G

L 4B

PC

LC

at 3516G76

200533268

4060019333

97G

L 5A

tlas Copco

Cat G

39976

1989179467

N/A

LPB49 N

os.

GL

48 Nos.

TOTA

L97 N

os.

TOTA

L HO

LDIN

G IN

2016-17

H'JA

N

GL

DIK

OM

LPB

MR

N-2

LPB

GL/G

I

GL

LPB

YEAR

WISE C

APA

CITY A

VAILA

BILITY O

F GA

S CO

MPR

ESSOR

STATIO

NS

ANNEXURE V

Rated

Capacity

Available

capacityPhaseout

PlanC

ompressor

Prime M

overM

MSC

MD

Speed

Suc. P

ress.Tem

p.2013-14

2014-152015-16

2016-17

LPB

4IR

(I) M

otor130

10.8

0.9599

2015-16

LPB

5W

OR

THC

at G399

650.8

0.80.95

40

LPB

6A

CW

au-L7042130

0.80.8

0.9579

GL 5

BP

CL

Motor

761

0.80.90

552015-16

GI 4

Atlas C

opcoW

au-L579070

0.80.8

0.9040

GL 6

BP

CL

Cat 3516

760.8

0.80.90

44U

nder comm

issioningLP

B 5

AC

Wau-L7042

1300.8

0.80.95

79

LPB

6B

PC

LW

au 579065

0.80.8

0.9540

Under com

missioning

LPB

7B

PC

LW

au 579065

0.80.8

0.9540

Under com

missioning

GL/G

IG

I 3A

tlas Copco

Wau-L5790

700.8

0.80.90

4040

4040

40

LPB

3A

CW

au-L7042130

0.80.8

0.9579

LPB

4A

CW

au-L7042130

0.80.8

0.9579

LPB

5B

PC

LW

au-L5790130

0.80.8

0.9579

GL 3

IR (C

) W

au-L579076

0.80.8

0.9044

2015-16

GL 6

Atlas C

opcoW

au-L510876

0.80.8

0.9044

GI 1

Atlas C

opcoW

au-L704270

0.80.8

0.9040

GI 2

Atlas C

opcoW

au-L579070

0.80.8

0.9040

LPB

1IR

(C)

Wau-L7042

1300.8

0.80.95

792015-16

LPB

4W

orthC

at G399

650.8

0.80.95

40

LPB

5A

CW

au-L7042130

0.80.8

0.9579

LPB

2IR

CW

au-L7042130

0.80.8

0.9579

2015-16

LPB

3A

CW

au-L7042130

0.80.8

0.9579

LPB

4A

CW

au-L7042130

0.80.8

0.9579

GL 7

Atlas C

opcoC

at G399

760.8

0.80.90

44

GI 1

Atlas C

opcoW

au-L704270

0.80.8

0.9040

GI 2

Atlas C

opcoW

au-L579070

0.80.8

0.9040

LPB

2B

PC

LW

au-L7042130

0.80.8

0.9579

2015-16

LPB

3IR

(I)M

otor130

10.8

0.9599

2015-16

LPB

4IR

(I)M

otor130

10.8

0.9599

2015-16

GL 2

IR(I)

Motor

761

0.80.90

552015-16

GL 3

IR(I)

Motor

761

0.80.90

552015-16

GL 4

IR(I)

Wau-L5108

760.8

0.80.90

442016-17

GL 7

IR(I)

Motor

761

0.80.90

552015-16

0

GL/G

I209

209209

44

124

7LPB

277277

277

6LPB

237237

237158

GL/G

I124

124124

124

5LPB

119119

11940

4LPB

237237

237237

GL/G

I168

168168

2LPB

158158

158158

118

GL/G

I

GC

SD

uty

139139

13984

Unit

No.

Unit D

etailD

erating factorYear w

ise available capacity at GC

SR

emarks

1LPB

217217

217

YEAR

WISE C

APA

CITY A

VAILA

BILITY O

F GA

S CO

MPR

ESSOR

STATIO

NS

ANNEXURE V

Rated

Capacity

Available

capacityPhaseout

PlanC

ompressor

Prime M

overM

MSC

MD

Speed

Suc. P

ress.Tem

p.2013-14

2014-152015-16

2016-17

GC

SD

utyU

nit N

o.U

nit Detail

Derating factor

Year wise available capacity at G

CS

Rem

arks

LPB

2B

PC

LW

au-L7042130

0.80.8

0.9579

2015-16

LPB

3IR

(I)M

otor130

10.8

0.9599

2015-16

GL 1

Worthington

Cat G

39976

0.80.8

0.9044

GL 3

BP

CL

Motor

761

0.80.90

552015-16

GL 4

BP

CL

Cat 3521

760.8

0.80.90

44

LPB

2W

orthingtonC

at G399

650.8

0.80.95

40

LPB

3W

orthingtonC

at G399

650.8

0.80.95

40

LPB

7A

tlas Copco

Wau-L7042

1300.8

0.80.95

79

GL 1

IR (I)

Wau-L5108

760.8

0.80.90

44

GL 3

BP

CL

Wau-L5108

760.8

0.80.90

44

GS

1A

tlas Copco

Wau-L5790

700.8

0.80.90

40

GS

2A

tlas Copco

Wau-L5790

700.8

0.80.90

40

LPB

1IR

(C)

Wau-L7042

1300.8

0.80.95

792015-16

LPB

2W

orthingtonC

at G399

650.8

0.80.95

40

LPB

3W

orthingtonC

at G399

650.8

0.80.95

40

LPB

4W

orthingtonC

at G399

650.8

0.80.95

40

LPB

5A

tlas Copco

Wau-L7042

1300.8

0.80.95

79

GL 1

IR (I)

Wau-L5108

760.8

0.80.90

442016-17

GL 2

Worthington

Cat G

39976

0.80.8

0.9044

GL 3

Atlas C

opcoC

at G 399

760.8

0.80.90

44

GL 4

Atlas C

opcoC

at G 399

760.8

0.80.90

44

LPB

1W

orthingtonC

at G 399

650.8

0.80.95

40

LPB

2W

orthingtonC

at G 399

650.8

0.80.95

40

LPB

3A

tlas Copco

Wau-L7042

1300.8

0.80.95

79

GL 1

Worthington

Cat G

39976

0.80.8

0.9044

GL 2

IR (I)

Wau-L5108

760.8

0.80.90

442016-17

GL 3

Atlas C

opcoC

at G399

760.8

0.80.90

44

LPB

1W

orthC

at G399

650.8

0.80.95

40

LPB

2A

CW

au-L7042130

0.80.8

0.9579

GL 1

BP

CL

Wau-L5108

760.8

0.80.90

44

GL 2

Atlas C

opcoC

at G399

760.8

0.80.90

44

LPB

1A

tlas Copco

Wau-L7042

1300.8

0.80.95

79

LPB

2W

orthingtonC

at G399

650.8

0.80.95

40

L'KA

SHI

LPB238

238238

238

GL

8888

8888

N'JA

NLPB

119119

119119

GL/G

I132

132132

132

U'PU

RLPB

159159

159159

GL / G

I176

176176

176

JRN

LPB278

278278

199

GL/G

S168

168168

168

K'G

UR

ILPB

159159

159159

GL

143143

14388

8LPB

178178

1780

YEAR

WISE C

APA

CITY A

VAILA

BILITY O

F GA

S CO

MPR

ESSOR

STATIO

NS

ANNEXURE V

Rated

Capacity

Available

capacityPhaseout

PlanC

ompressor

Prime M

overM

MSC

MD

Speed

Suc. P

ress.Tem

p.2013-14

2014-152015-16

2016-17

GC

SD

utyU

nit N

o.U

nit Detail

Derating factor


CS

Rem

arks

LPB

3A

tlas Copco

Wau-L7042

1300.8

0.80.95

79

LPB

4B

PC

LW

au 579065

0.80.8

0.9540

Under com

missioning

GL 1

Atlas C

opcoW

au-L510876

0.80.8

0.9044

GL 2

Atlas C

opcoW

au-L510876

0.80.8

0.9044

LPB

1A

tlas Copco

Wau-L7042

1300.8

0.80.95

79

LPB

2B

PC

LW

auL5790130

0.80.8

0.9579

GL 1

Atlas C

opcoW

au-L510876

0.80.8

0.9044

GL 2

Atlas C

opcoW

au-L510876

0.80.8

0.9044

GL 3

BP

CL

Cat 3516

760.8

0.80.90

44

LPB

1IR

(I)W

au-L7042130

0.80.8

0.9579

LPB

2IR

(I)W

au-L7042130

0.80.8

0.9579

LPB

3A

tlas Copco

Wau-L7042

1300.8

0.80.95

79

LPB

4A

tlas Copco

Wau-L7042

1300.8

0.80.95

79

GL 1

BP

CL

Wau-L5108

760.8

0.80.90

44

GL 2

BP

CL

Wau-L5108

760.8

0.80.90

44

GL 3

Atlas C

opcoC

at G399

760.8

0.80.90

44

GL 4

Atlas C

opcoW

au-L579070

0.80.8

0.9040

GS

5A

tlas Copco

Wau-L5790

700.8

0.80.90

40

LPB

1A

tlas Copco

Wau-L7042

1300.8

0.80.95

79

LPB

2B

PC

LW

au-L7042130

0.80.8

0.9579

LPB

3A

tlas Copco

Wau-L7042

1300.8

0.80.95

79

LPB

4B

PC

LC

at G3516G

650.8

0.80.95

40

LPB

5B

PC

LW

au 579065

0.80.8

0.9540

Under com

missioning

GL 1

Atlas C

opcoW

au-L510870

0.80.8

0.9040

GL 2

BP

CL

Wau-L5108

760.8

0.80.90

44

GL 3

Atlas C

opcoW

au-L579076

0.80.8

0.9044

GL 4

BP

CL

Cat 3516G

760.8

0.80.90

44

GL 5

BP

CL

Cat 3516

760.8

0.80.90

44

LPB

1W

orthingtonC

at G399

650.8

0.80.95

40

LPB

2W

orthingtonC

at G399

650.8

0.80.95

40

GL

GL 1

Worthington

Cat G

39976

0.80.8

0.9044

4444

4444

LPB

1IR

(I)M

otor65

10.8

0.9549

2016-17

LPB

2IR

(I)M

otor65

10.8

0.9549

2016-17

MR

N-2

LPB454

454454

454

DIK

OM

LPB80

8080

80

GL

216216

216216

K'LO

NI

LPB317

317317

317

GL/G

S212

212212

212

S'MA

RI

LPB316

316316

316

GL

132132

132132

J'PUR

LPB158

158158

158

GL

8888

8888

YEAR

WISE C

APA

CITY A

VAILA

BILITY O

F GA

S CO

MPR

ESSOR

STATIO

NS

ANNEXURE V

Rated

Capacity

Available

capacityPhaseout

PlanC

ompressor

Prime M

overM

MSC

MD

Speed

Suc. P

ress.Tem

p.2013-14

2014-152015-16

2016-17

GC

SD

utyU

nit N

o.U

nit Detail

Derating factor


CS

Rem

arks

LPB

3IR

(I)W

au-L7042130

0.80.8

0.9579

2016-17

LPB

4IR

(I)W

au-L7042130

0.80.8

0.9579

2016-17

LPB

5W

orthC

at G399

650.8

0.80.95

40

LPB

6A

CW

au-L7042130

0.80.8

0.9579

LPB

7A

CW

au-L7042130

0.80.8

0.9579

GL 2

IR (I)

Motor

761

0.80.90

552016-17

GL 3

Worthington

Cat G

39976

0.80.8

0.9044

GL 4

BP

CL

Wau-L5108

760.8

0.80.90

44

GL 5

Atlas C

opcoC

at G399

760.8

0.80.90

44

GL 6

Atlas C

opcoC

at G399

760.8

0.80.90

44

GL 7

Atlas C

opcoW

au-L510876

0.80.8

0.9044

LPB

1B

PC

LW

au-L7042130

0.80.8

0.9579

LPB

2IR

(I)W

au-L7042130

0.80.8

0.9579

LPB

3A

tlas Copco

Wau-L7042

1300.8

0.80.95

79

LPB

4B

PC

LW

au 579065

0.80.8

0.9540

Under com

missioning

LPB

5B

PC

LW

au 579065

0.80.8

0.9540

Under com

missioning

GL 1

BP

CL

Wau-L5108

760.8

0.80.90

44

GL 2

BP

CL

Wau-L5108

760.8

0.80.90

44

GL 3

Atlas C

opcoW

au-L510876

0.80.8

0.9044

GL 4

BP

CL

Cat 3516G

760.8

0.80.90

44

GL 5

Atlas C

opcoC

at G399

760.8

0.80.90

44

GL

220220

220

H'JA

NLPB

317317

317317

220

GL/G

I275

275275

275

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