mech 011_5_hydrant pumps.pdf

8/11/2019 MECH 011_5_Hydrant Pumps.pdf

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Prepared by : .................................................................... Air BPP J Dubenski

Approved by : .................................................................... Air BPG J Elkes

AIR BP

Specification: Mech 11

SPECIFICATION FORHYDRANT PUMPS

Issue : 5Date : 17-SEPT-96

AIR BP LIMITEDBREAKSPEAR PARK

BREAKSPEAR WAYHEMEL HEMPSTEAD

HERTFORDSHIRE, HP2 4UL

ENGLAND, UNITED KINGDOM


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SPECIFICATION FOR HYDRANT PUMPS

AIR BP MECH 11.5.doc - Page i

REVISION RECORD

Issue Date Reason for Revision

5 17-SEPT-96 Revised Format. Revisions highlighted.

Issue D 13-JUL-92 Revised Format. Ductile Cast Iron Body Permitted

for Air BP.Issue C 4- APR-91 Revised to Include Consortium (Shell/Esso)

requirements. Cast Pump Body Required.

Issue B 25-FEB-91 Generalised Revision

Issue A JUL-89 Stansted Hydrant Pumps

Disc Reference - Q:\Air BP Specifications and Guidelines\Mechanical(MECH)\Superseded\MECH 11.5.doc

Copyright Air BP Limited

All rights reserved. This document and the information it contains, or may be extractedfrom it, is subject to the terms and conditions of the agreement or contract under whichthe document was supplied to the recipient's organisation.

None of the information contained in this document shall be disclosed outside of therecipient's own organisation without prior written permission of Air BP Limited, unlessthe terms of such agreement expressly allow.


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AIR BP MECH 11.5.doc - Page ii

CONTENTS

SECTION.................................................................................................................................. PAGE

1. SCOPE......................................................................................................................................... 1

2. REFERENCES ............................................................................................................................. 1

3. PRODUCT DATA......................................................................................................................... 1

4. PUMPSET DUTY ......................................................................................................................... 1

4.1. DUTY POINT AND SUCTION CONDITIONS ....................................................................................... 1

4.2. HEAD/FLOW CHARACTERISTIC ..................................................................................................... 2

4.3. PUMPING AGAINST A CLOSED DISCHARGE VALVE ........................................................................ 2

5. PUMP DESIGN AND CONSTRUCTION...................................................................................... 25.1. PUMP TYPE ................................................................................................................................. 2

5.2. PUMP MATERIALS........................................................................................................................ 2

5.3. INLET/OUTLET FLANGES .............................................................................................................. 3

5.4. MECHANICAL AND OTHER SEAL REQUIREMENTS........................................................................... 3

5.5. BEARINGS ................................................................................................................................... 3

5.6. COUPLING................................................................................................................................... 3

5.7. GUARDS FOR COUPLINGS AND MOVING PARTS ............................................................................ 3

5.8. VENTS & DRAINS......................................................................................................................... 3

5.9. HOLDING DOWN BOLTS ............................................................................................................... 4

5.10. PRESSURE AND PRESSURE/VACUUM GAUGES ............................................................................ 4

5.11. FACILITY FOR CONDITION MONITORING ...................................................................................... 4

5.12. PUMPSET NAMEPLATE ............................................................................................................... 45.13. PAINTING................................................................................................................................... 5

6. MOTOR DESIGN AND CONSTRUCTION .................................................................................. 5

7. PUMP TESTS............................................................................................................................... 5

7.1. REQUIREMENT FOR WITNESSED TESTS ........................................................................................ 5

7.2. MATERIALS TEST CERTIFICATES .................................................................................................. 5

7.3. HYDROSTATIC TEST..................................................................................................................... 5

7.4. PERFORMANCE TEST ................................................................................................................... 5

7.5. NPSH TEST................................................................................................................................ 6

7.6. FINAL ASSEMBLY AND ALIGNMENT ............................................................................................... 6

8. PACKAGING AND DELIVERY .................................................................................................... 68.1. PROTECTION ............................................................................................................................... 6

8.2. DELIVERY.................................................................................................................................... 6

9. DOCUMENTATION AND CERTIFICATION................................................................................ 6

10. SPARE PARTS AND ADDITIONAL ITEMS .............................................................................. 6

ATTACHMENT 1 INFORMATION REQUIREMENTS FOR TENDER, APPROVED &

CERTIFIED FINAL DOCUMENTS... ............................................. ( 1 PAGE )

ATTACHMENT 2 SPARE PARTS AND ADDITIONAL ITEMS... ............................... ( 1 PAGE )

ATTACHMENT 3 PUMP DATA SHEET... .................................................................. ( 1 PAGE )

ATTACHMENT 4 EXAMPLE ENQUIRY...................................................................... (1 PAGE)


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AIR BP MECH 11.5.doc - Page 1

1. SCOPE

This specification details the requirements for single-stage, centrifugal, motor drivenpumps operating in parallel on aviation fuelling hydrants.

This specification can also be used for diesel driven pumps although additionalsealing requirements should be specified to achieve practical pump/driver separationto comply with hazardous area classification requirements.

Any conflicting requirements or deviations shall be referred to the purchaser forwritten approval or clarification prior to submitting tenders, placing orders orcommencing manufacture.

2. REFERENCES

BP/ELEC 1 Specification For Pump Motors

3. PRODUCT DATA

Unless stated otherwise on the Pump Data Sheet (Attachment 3), the product is asfollows:

Product: Aviation Kerosene (Jet A-1)

Density: 775-840 kg/m3 @ 15C

Viscosity: 2 Centistokes @ 15C

Vapour pressure: 0.15 psi (0.01 bar) maximumAmbient Temp: UK 35C Maximum

Overseas seeAttachment 3.

4. PUMPSET DUTY

4.1. Duty Point and Suction Conditions

Required operating conditions are to be specified by the purchaser on Attachment 3.

Pumps shall not be offered with fully sized impellers to satisfy the required duty -where alternatives are possible they shall be referred to the purchaser for comment.

Unless stated otherwise, pumps will be operating at ambient temperature withflooded suctions subjected to fluctuating inlet pressure depending on tank head.

NPSHA should be greater than the NPSHR required by 15% or 1m, whichever islarger. NPSHA should be the minimum pertaining to any continuous operating case(for aviation fuel systems this will normally be tanks at low level with hydrantoperating at the maximum fuel hydrant design flowrate).


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4.2. Head/Flow Characteristic

The head/flow characteristic of each pump shall be stable and continuously fallingwith between 7% and 12% drop in head between stall and duty points.

To permit the hydrant pumps to be operated satisfactorily in parallel, the individualflowrates of all the pumps, at any discharge pressure between stall and 90% of theduty pressure, shall be within a band of +/-5% of the flow rate at the same dischargepressure derived from the ideal pump curve which passes through the specified dutypoint.

4.3. Pumping Against A Closed Discharge Valve

4.4.The manufacturer shall advise the typical temperature rise to be expected after 3minutes pumping against a closed discharge valve and also the maximumrecommended pumping time against a closed discharge valve.

5. PUMP DESIGN AND CONSTRUCTION

5.1. Pump Type

All hydrant pumps shall be of the horizontal, single-stage, centrifugal type withmechanical seals and outboard bearings. Either horizontal or vertically split casingpumps may be offered by the manufacturer.

Pumpsets shall be supplied with the pump coupled to its motor driver on a singlebedplate. The bedplate shall have been designed for all reasonable loadingsincluding those experienced during loading, transportation, offloading and installationon site.

5.2. Pump Materials

Casing: Cast Carbon Steel, Ductile Cast Iron or equivalent to suit design

pressure (ref Attachment 3)

Grey Cast Iron is unacceptable.

Casing Rings: Carbon Steel

Impeller: Cast Steel/High Tensile Cast Iron/Stainless Steel or equivalent

Shaft: High Tensile SteelShaft Sleeves: 18-8 Stainless Steel or 12% Cr. Steel

Seal Piping: Seamless, cold-drawn, fully annealed Stainless Steel tube Type316 or 316L tubing, 2mm min wall thickness, max hardnessRockwell B90. Stainless Steel compression fittings forconnections

Gaskets : Non-graphited compressed asbestos fibre (CAF), Viton A, BunaN or equivalent. Cork or rubber impregnated cork gaskets arenot acceptable

No al loys of copper, zinc or cadmium shal l be used for

wet ted parts of the pum p.


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5.3. Inlet/Outlet Flanges

Pump inlet outlet flanges shall preferably be ANSI B16.5 Class 150 Raised Face tosuit fit up with standard Schedule 40 pipework.

Alternative flange standards are acceptable provided they are suitable for the designpressure (ref Attachment 3).

For centrifugal single stage pumps, both inlet and outlet flange shall be on thesection of pump which is fixed to the baseplate so that pumps can be dismantledwithout removing suction or discharge pipework.

5.4. Mechanical and Other Seal Requirements

All pumps shall be supplied with single mechanical seals suitable for the maximum

design pressure either with the pump stationary or in operation (ref Attachment 3).

For all diesel driven pumps and preferably for motor driven pumps, pumps shouldalso be provided with a throttle bush or other secondary sealing arrangement whichreduces the probability of release in the event of a primary (inner) seal failure. Sucha seal system shall be designed with a drain as means of detecting leakage of theinner seal - this drain shall be open at all times so that leakage is detected at theearliest opportunity.

Refer to IP Model Code of Practice Part 15 Area Classification Code for PetroleumInstallations for further guidance.

5.5. Bearings

To avoid contamination of product, all pumps shall have outboard bearings (ball orroller type). These bearings shall either be oil or lithium-base grease lubricated.

5.6. Coupling

All pumps shall be direct coupled using a flexible type coupling. It shall be possibleto remove the impeller without disturbing suction or discharge pipework (couplingspacers shall be provided as necessary).

Where couplings have been balanced as assembled units they are to bepermanently match marked to ensure correct reassembly.

5.7. Guards For Couplings and Moving Parts

All moving parts shall be guarded in accordance with BS 5304 or equivalent nationalstandard. Guards shall be sheet steel, and be sufficiently robust to resist distortionin normal industrial use to avoid risk of sparking due to contact with moving parts.

5.8. Vents & Drains

All vent and drain points shall be fitted with stainless steel valves. All valves shall befitted with screwed plugs.

The pump GA drawing is to identify all pressure connections including details of sizeand thread types used.


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5.9. Holding Down Bolts

To enable future maintenance and repairs, holding down bolts for both pumps andmotors shall be fully detailed on the parts list including size, material specificationand recommended torque.

5.10. Pressure and Pressure/Vacuum Gauges

Each pump body shall have a tapping on the inlet and outlet suitable for installationof a pressure/vacuum or pressure gauge.

The requirement for pressure and pressure/vacuum gauges are detailed in

Attachment 2by the purchaser if required.

5.11. Facility for Condition Monitoring

Manufacturer's recommendations for facilities for future Condition Monitoring (e.g.

temperature and/or vibration monitoring) shall be offered by the supplier as an optionfor the purchaser.

5.12. Pumpset Nameplate

Pumpset details shall be engraved on Stainless Steel nameplates. Nameplates shallbe attached in a visible location using screws or rivets - attachment with adhesive isnot acceptable.

The nameplate shall include the following information:

Purchaser's Order No.Purchaser's Ref No./Tag No.* Order Date* Manufacturer's Order/Ref No.* Pump Model No, Type & Size* Pump Serial No.

Rated speed (rpm)Rated flow (m3/hr)Rated pump total head (m)Rated temperature (C)Product PumpedImpeller diameter - installed (mm)

Impeller diameter - max size (mm)Design pressure (barg)Test pressure (barg)Mechanical Seal Manufacturer & TypeBearings Manufacturer & Type DE (Drive End)Bearings Manufacturer & Type NDE (Non Drive End)Recommended lubricants

Where it is not practical to fit a full nameplate as detailed above on the pump bodyitself - a brief nameplate (items marked *) shall be attached to the pump and a fullnameplate attached to the pumpset bedplate.


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5.13. Painting

The paint system used on the pumpset shall be suitable for installation in anunprotected outdoor location and shall not be adversely affected by contact with theproduct pumped.

6. MOTOR DESIGN AND CONSTRUCTION

All motors shall comply with BP/ELEC 1 Specification For Pump Motors and beselected to suit operation of the pumps at all flow rates between stall and 110% ratedflow.

7. PUMP TESTS

7.1. Requirement For Witnessed Tests

The requirement for witnessed tests shall be specified by the purchaser.

Where witnessed tests are specified by the purchaser, the manufacturer shall givethe purchaser at least 7 days notice that the test is to take place and this shall beconfirmed at least 24 hrs before carrying out the test. The purchaser shall notentertain any claims for delay should such notice not be given.

7.2. Materials Test Certificates

The pump manufacturer shall provide a material certificate of conformity for eachpump.

7.3. Hydrostatic Test

Each pump body shall be subjected to a hydrostatic pressure test of 1.5 x the designpressure. The test shall be carried out using kerosene and held for 1 hour. Thereshall be no visible leaks.

The pump manufacturer's standard test pressure shall be used where it is higherthan 1.5x the purchaser's basic design pressure (ref Attachment 3).

7.4. Performance Test

Each pump shall be given a performance test using water to produce its individualhead/flow and adsorbed motor power characteristic (refer to Section 4for requiredperformance tolerances).

Slave motors may be used for water performance tests with approval from thepurchaser.

The manufacturer's test report shall included these characteristics for water togetherwith equivalent derived characteristics for the pumped product (Jet A-1).

Motor performance tests are detailed in BP/ELEC 1 Specification for Pump Motors.


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7.5. NPSH Test

Separate NPSH tests are not required unless the NPSH available does not exceedthe NPSH required by more than 0.5m.

7.6. Final Assembly and Alignment

Pumpsets are to be despatched to site fully aligned.Pump alignment is to be within 0.05mm or the manufacturer's standard whichever isthe smaller. Alignment shall be measured using laser/optical equipment (preferred)or by using two dial clocks (face to face and periphery).

8. PACKAGING AND DELIVERY

8.1. Protection

On satisfactory completion of testing, pumps are to be completely drained of waterand thoroughly dried. To prevent ingress of dirt and/or moisture, all threadedopenings are to be closed with Carbon Steel plugs and all flanged openings are tobe closed water-tight using wooden discs or plastic end caps and finally sealing withDenso tape or similar.All external bright surfaces are to be coated with an approved rust inhibitor.

Pumpsets are to be shipped complete and fully assembled. However, fragile itemssuch as pressure gauges are to removed, packed and shipped separately.

8.2. Delivery

Completed pumpsets are to be delivered to the address shown on the purchaseorder.

The pump manufacturer is to give 7 days notice of delivery and is to confirm delivery24 hrs before delivering to site. Should such notice not be given, vehicles may beturned away from site without unloading at no additional cost to the purchaser.

Delivery notes are to detail the Purchaser's Order No. and Reference No., and listeach individual item sent. Items packed separately are to be highlighted.

Delivery notes are also to detail any special handling requirements including details

of pumpset weight and recommended lifting points.

9. DOCUMENTATION AND CERTIFICATION

The documentation and certification required (including timing) are listed in

Attachment 1.

10. SPARE PARTS AND ADDITIONAL ITEMS

Spare parts and additional items to be supplied with the pump are listed in

Attachment 2.


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AIR BP MECH 11.5.doc - Page A1/1

ATTACHMENT 1

INFORMATION REQUIREMENTS FOR TENDER, APPROVAL AND CERTIFIED FINAL

DOCUMENTS

1. WITH QUOTATION1.1 Copy of completed Pump Data Sheet (Attachment 3).

1.2 Confirmation that the pumpsets offered comply with the specified requirements in allrespects. List non-conformances where applicable.

1.3 Pump characteristic curves both for pumping water and Jet A-1 (head/flow, NPSHrequired, absorbed motor power/flow).

1.4 Priced list of recommended spares for first 2 years of operation (specify est. delivery timeor ex-stock).

2. WITHIN 3 WEEKS OF AN ORDER BEING RECEIVED BY PUMP MANUFACTURER

2.1 2 copies of the dimensioned Pump GA Drawing for approval by the purchaser.

The GA drawings are to be marked up so that they are specific for this order and show thesame information as the full nameplate (see Section 5.10)., Pumpset weight,recommended lifting points and details of all casing openings (sizes of flanges andthreaded plugs) are also to be shown.

2.2 2 copies of the certified Pump Sectional drawings.

2.3 2 copies of the certified Pump Parts List.

2.4 2 copies of the Pumpset installation, maintenance and operation manual.

2.5 2 copies of the Mechanical Seal installation and maintenance instructions.

2.6 2 copies of the completed and approved Pump Data Sheet (revised where necessary tosuit final purchase order).

3. WITHIN 3 WEEKS OF THE PURCHASER'S APPROVAL OF THE DRAWINGS

3.1 2 copies of the certified dimensioned Pump GA drawings incorporating the purchaser'scomments (if any).

4. AT LEAST 1 WEEK PRIOR TO DESPATCH OF THE PUMPSET FROM THE

MANUFACTURER'S WORKS

4.1 2 copies Materials certificate of conformity.

4.2 2 copies of alignment records/certificate.

4.3 2 copies of Hydrostatic Test certificate.

4.4 2 copies of the certified performance test report for each pump (including performancecurves).

4.5 See also Attachment 2. Spare Parts and Additional Items for other certificationrequirements.

NOTE

1. The pump manufacturer is also to provide the motor information required by

BP/ELEC 1 Specification For Pump Motors.

2. ALL DOCUMENTATION AND DRAWINGS ARE TO BE MARKED WITH THE

PURCHASER'S ORDER No., REFERENCE No. AND THE MANUFACTURER'S ORDERNo.


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ATTACHMENT 2

SPARE PARTS AND ADDITIONAL ITEMS

The following spare parts and additional items shall be priced separately on the quotation:

For each pumpset:-

1.1 One set foundation bolts.

1.2 One set assorted shims (for realignment of pump on baseplate on site if required).

1.3 One set grease nipples.

1.4 One pair of Carbon Steel A105N matching flanges for inlet/outlet flanges to suit Schedule40 pipework complete with B7 studbolts, 2H nuts and 2 self-centring CAF joints. Materials

certificates to be supplied with flanges.

NB. Matching flanges only required if different from ANSI B16.5 Class 150

Raised Face (see Section 5.3).

1.5 One set gauges (ref Section 5.9) comprising of:

1 off combination pressure/vacuum gauge range from 25-30" (635-762mm)Hg(vacuum) to 25-30 psig (pressure)

1 off pressure gauge range 0 to 250 psig

Gauges shall be suitable for the product pumped, include pulsation dampers andincorporate an isolation valve for isolation from the pump body. The gauge dial shall bemarked in psig for pressure and mm Hg Mercury for vacuum with black lettering on a whitebackground. The gauge dial shall be 100mm dia. minimum.

Copies of gauge calibration certificates shall be included with the pump documentation.

For total order:-

2.1 Two complete seal/gasket sets including mechanical seals, gaskets and 'O'-rings.

2.2 Two sets of spare pump and motor bearings.

2.3 Two spare flexible membranes for the pump/motor couplings together with 4 shaft keysand 4 coupling bolts and nuts.


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ATTACHMENT 3

PUMP DATA SHEET

PLEASE COPY HERE


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AIR BP MECH 11 5 d P A4/1

ATTACHEMENT 4

EXAMPLE ENQUIRY INSTRUCTIONS FOR ENQUIRY FOR BIRMINGHAM AIRPORT HYDRANT

PUMPSETS

1. Introduction

This enquiry is for two hydrant pumpsets complying with Air BP SpecificationsBP/STN/MECH 11 Issue C and BP/STN/ELEC 1 Issue C for use on the new aviationfuelling hydrant at Birmingham International Airport. Tenders are to be returned by12.00am Friday 19.4.91.

2. Information To Be Provided With Quotation

2.1 All the information requested in Section 1 of:-

BP/STN/MECH 11 Attachment 1

BP/STN/ELEC 1 Attachment 2

2.2 A lump sum price for the pumpsets packed and delivered to Birmingham Airport. Thisprice shall include all unwitnessed tests, packaging, documentation, drawings andcertification.

2.3 Estimated ex-works delivery period from receipt of order from Air BP.

NB. It is hoped that these pumpsets will be available for installation on site by

2.9.91.

2.4 The requirements listed below shall be priced as optional extras from 2.2 above:-

2.4.1 Optional price per pumpset of a witnessed hydrostatic test.

2.4.2 Optional price per pumpset for witnessed pump performance test.

2.4.3 Optional price per motor for witnessed full and routine tests at the motormanufacturer's works.

2.4.4 Optional price for spare parts and additional items listed in BP/STN/MECH 11

Attachment 2.

2.4.5 Optional price per motor for Ex-d motor suitable for Zone 1 environment (not Zone 2 asspecified in BP/STN/ELEC 1).

2.4.6 Optional additional price for a site service agreement. This shall be the manufacturer'sstandard arrangement and cover at least the following:-

- Regular site inspection & maintenance,- Regular condition monitoring,- Supply & installation of spares,- Emergency call-out service offered.

2.4.7 Optional additional price per motor of built-in temperature detectors.

mech 011_5_hydrant pumps.pdf

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