PIPING GUIDE

A.1 CHECK LIST FOR ISOMETRICS 1) Line Nos. 2) Line Specs 3) Start Point Location 4) End Point Location 5) Branch Connection 6) Valve Accecibility 7) Support 8) Insulation (For Insulated Line Only)9) Instrument Connection 10) Flow Arrow 11) High Point Vent, Low Point Drain 12) Hydro Test Vent And Drain 13) Nozzle Connection 14) Nozzle Nos. 15) Equipment Nos.16) Coordinates And Elevations17) Iso North18) Bill Of Material19) Valve Tag Nos.20) Instruments Tag Nos.21) Contination Sheets Or Iso. Nos. 22) Grid Location And Nos.

A.2 DOCUMENTS FOR ISOMETRICS CHECKING1) Piping And Instrument Diagrames2) Piping Layouts 3) Sectional Drawings4) Equipment Drawings5) Nozzle Orientations6) Piping Specification 7) Suppotrs Standard8) Special Items Drawings 9) Sress Analysis Report

A.3 POINTS TO REMEMBERS IN ISOMETRICS CHECKING1) Pump Suction Is Bigger Than Discharge Line2) Eccentric Reducer (Flat Side Top) Using For Pump Suction Line This Is Using For Avoid The Air

Block In Pump Suction.3) Pump Suction Line And Compresser Suction Line Keep Always Downword Position, No Loops

Permitted To Pump Suction.4) Psv Outlet Always Rising Position. 5) Check The Valve Accesibility For Maitainance Purpose. Valve Operating Height Min 250mm To

1200mm From Floor Level.6) Lift Check Valve Always Horizontally Using. Swing Check Valve Verticaly And Horiontaly Using.7) Control Station Operating Height 500mm To 750mm From Floor Level.8) Shoe Not Required For Trunion. (Insulated Lines) 9) Headroom Clearance Minimum 2.2m From Ground/Floor Level.10) Dripleg Required For Steam Line Header.11) Shoe Required For Insulated Lines (Steam ,Chilled Water,Brine,Steam Condasate).12) Shoe Not Required For Condansate Line When Line Will Be On Pipe Rack.13) Nozzle Orientations Should Be Keep As Per Piping Requirement. 14) Avoid The Obstucles. Keep A Piping Routing Neat And Clearly.15) Control Stations Locates Side Of Near The Walls Or Columns16) Give A Trunion Supports To Control Station Both Side Of Control Valves.17) Use A Dike Wall Around The Equipments For Avoid The Liquid To Spread In The Plant Area. The

Volume Of Dike Wall Is 1.5 Times More Than Total Capacity Of Equipments.18) Use Weldneck Flange For Pressure Piping.

B.1 TYPES OF CONTROL VALVE1) Pcv Pressure control Valve

2) Tcv Temperature Control Valve3) Fcv Flow Control Valve4) Lcv Level Control Valve5) Xv Isolation Valve6) Xcv High Pressure Control Valve

B.2 TYPES OF PUMPS1) Reciprocating Pump2) Rotary Pump3) Centrifugal Pump4) Vacuum Pump5) Metering Pump

B.3 TYPES OF EXCHANGER1) Air Cooler Exchanger2) Plate Type Exchanger3) Shell & Tube Exchanger4) 2 Pipe Exchanger5) Spiral Exchanger

B.4 TYPES OF COMPRESSOR1) Elevated Centrifugal Compressor2) Grade-Mounted Centrifugal Compressor 3) Reciprocating Compressor

B.5 TYPES OF TOWER1) Tray Tower2) Packed Tower3) Vacuume Tower

B.6 TYPES OF VALVE1) Gate Valve

2) Globe Valve

3) Check Valve (Non Return Valve)

4) Ball Valve

5) Butterfly Valve6) Diaframe Valve7) Plug Valve

B.7 TYPE OF FLANGES1) Weldneck Flange (Flat Face,Race Face)

2) Slipon Flange Do

3) Lap Joint Flange (Flat Face)4) Reducing Flange (Flat Face,Race Face)5) Screwed Flange6) Blind Flange7) Socketweld Flange

B.7A PRESSURE TEMPERATURE RATTING150#, 300#, 400#, 600#, 900#, 1500#, 2500#.

B.7B FLANGES FACING1) Ff Flat Face2) Rf Raise Face3) T/G Tongue And Groove Face4) M/F Male And Female Faces5) Rtj Ring Type Joint Faces

B.8 TYPES OF FITTINGS1) 90 Elbow, 45 Elbow (Butt Welded, Socket Welded, Threded)2) Equal Tee, Reducing Tee Do3) Cap,Union,Plug, Half Coupling, Full Coupling, Lateral.

B.9 TYPES OF OLETS1) Laterolet2) Elbowlet3) Weldolet4) Sockolet

5) Threadolet6) Sweepolet7) Nippolet

B.10 TYPES OF REDUCER1) Eccentric Reducer (Butt Welded)2) Concentric Reducer (Butt Welded)3) Swages (Socket Weld, Threded)

B.11 TYPES OF INSTRUMENTS1) Psv Pressure Safety Valve2) Lg Level Guage3) Li Level Indicator3) Pg Pressure Guage4) Pi Pressure Indicator4) Cv Control Valve5) Ti Temperature Indicator6) Tw Thermowell7) Fe Flow Elements8) Fi Flow Indicators9) Fo Flow Orifice Flanges

A GENERAL PURPOSE1) Control Valves (Globe, Ball, Butterfly)2) On/Off Valves (Ball, Butterfly)3) Relief Valves (Pressure, Thermal)4) Rapture Disc5) Restriction Orifice

B FLOW MESSURING INSTRUMENTS1) Orifice Plate2) Variable Aria Flow Meter3) Magnetic Flow Meter4) Turbine Flow Meter5) Positive Displacement Meter

C TEMPERATURE MEASURING INSTRUMENTS1) Thermocouples2) Resistance Temperature Detactors3) Filled System4) Bimetallic Thermometres5) Thermowells

D PRESSURE MESSURING INSTRUMENTS1) Manometer2) Bourden Type3) Bellow Type4) Diaphragm Type

E LEVEL MEASURING INSTRUMENTS1) Level Guage (Direct Type)2) Hydrostatic Head (Inferential)3) Buoyancy4) Conductance5) Capacitance6) Radiation7) Float

B.12 SPECIAL ITEMS1) Steam Trap (Float Type, Thermodynamic,Bucket)2) Orifice Flange3) Flow Elements4) Strainner (Y Type Srainner, Bucket Type Strainner)

B.13 TYPES OF PIPE ENDS1) Pbe Plain Both End2) Ple Plain Large End3) Pse Plain Small End4) Ble Bevelled Large End5) Tse Threaded Small End

B.14 TYPES OF GASKETS1) Full Face2) Inside Bolt Circle3) Spiral Wound Mettalic4) Ring Type5) Metal Jacketed

C.1 SERVICE CODE FOR UTILITY LINES1) Lps Low Pressure Steam2) Hps High Pressure Steam3) Mps Medium Pressure Steam4) Cws Cooling Water Supply5) Cwr Cooling Water Return6) Chws Chilled Water Supply7) Chwr Chilled Water Return8) Bs Brine Supply9) Br Brine Return10) Ia Instrument Air11) Ca Compress Air12) Dmw Potable Water3513) Ps Process Water

C.2 SERVICE CODE FOR PROCESS LINE1) Fg = Fuel Gas2) Pa = General Hydrocarbon3) Pb = Hydrocarbon With Sulfer4) Pc = Hydrocarbon With Hydrogen5) Pd = Hydrocarbon With Hydrogen & H2s6) Pe = Hydrocarbon With Sour Water7) Cb = High Strenght Caustic8) Va = Sulphuric Acid9) Ha = Hydrocloric Acid10) Cc = Low Strenght Caustic11) Ct = Catalyst12) Hy = Hydrogen13) Ch = Chemicals14) Ni = Nitrogen15) Ca = Amines16) Su = Molten Sulphur17) Ga = Gaseus Extinguishant18) Dl = Diesel19) Fg = Fuel Gas20) Fs = Fuel Gas (Sour)21) Fo = Fuel Oil22) Rt = Refrigerant23) Lg = Flue Gas24) Lo = Lube Oil25) Ba = General Hydrocarbon26) Bb = Hydrocarbon With Sulphur27) Bc = Hydrocarbon With Hydrogen28) Bd = Hydrocarbon With Hydrogen & H2s29) Be = Hydrocarbon With Sour Water

D.1 SHORT CODE1) Ibr Indian Boiler Regulation Act2) Astm American Society Of Testing Material3) Ansi American National Standard Institute4) Smls Seamless5) Thd Threded6) Bw Butt Welded8) Sw Socket Welded9) Ecc. Red. Eccentric Reducer10) Conc.Red. Concentric Reducer11) Eq.Tee Equal Tee12) Red. Tee Reducing Tee13) Clpg Coupling14) Vlv Valve15) Str Strainner16) T Trap17) Elb Elbow18) Fof.El. Finish Floor Elevation19) Ptfl.El. Platform Elevation20) Gr.El Ground Elevation21) Sch Schedule22) Thk Thickness23) Eqpt Equipment24) Sorf Slipon Rase Face25) Soff Slipon Flat Face26) Wnrf Weldneck Rase Face27) Wnff Weldneck Flat Face28) Bop.El. Bottom Of Elevation29) Cl.El. Center Line Elevation30) Pcd Pitch Circle Dia.31) Nb Nominal Bore32) Ns Nominal Size33) Be Beveled End34) Isi Indian Standard Institute35) Fst Flat Side Top36) Fsd Flat Side Down37) Suc. Suction38) Disch. Discharge39) Wp.El. Work Point Elevation40) Ga General Arrangement41) P&Id Piping And Instrument Diagrames

D.2 AMERICAN STANDARD42) Astm The American Society Of Testing Materials43) Api The Americal Petroleum Institute44) Aisi The American Iron And Steel Institute45) Ansi The American National Standard Institute46) Aws The American Welding Society47) Awwa The American Water Works Association48) Asme The American Society Of Mechanical Engineers

D.3 API STANDARDS 1) Api5l Specification For Pipe Line2) Api6d Pipe Line Valves, End Closers, Connectors, And Swivels3) Api600 Steel Gate Valve4) Api 605 Large Diametre Carbon Steel Flanges

D.4 ANSI STANDARDS1) Ansi/Asme 31.1 Power Piping-19952) Ansi/Asme 31.2 Fuel Gas Piping-19683) Ansi/Asme-31.3 Chemical Petroleum Refinery Piping-1993

D.5 BRITISH STANDARD1) BS10 FLANGES2) BS806 PIPES AND FITTINGS FOR BOILER3) BS916 BLACK BOLTS,NUTS AND SCREWS4) BS1560 STEEL PIPE FLANGES5) BS1414 GATE VALVES FOR PETROLEUM INDUSTRIES6) BS1600 DIMENSIONS OF STEEL PIPES7) BS1965 BUTT WELDING PIPE FITTINGS8) BS2080 FACE TO FACE /END TO END DIMENSIONS OF VALVES9) BS2598 GLASS PIPE LINES AND FITTINGS.10) BS3351 PIPING SYSTEM FOR PETROLEUM REFINERIES

E.1 DRAWINGS1) Study Layout2) General Arrangement Drawings3) Piping And Instrument Diagrames4) Sectional Layouts5) Civil Layouts6) Equipment Layouts7) Fabrication Details Drawing8) Foudation Details Drawings9) Structural Layout10) Isometrics11) Piping Details Layout12) Nozzle Orientations13) Plot Plan14) Flow Diagrame

F1 PROCESS DESIGN CODE FOR SERVICE1) Sulfer Asme B31.32)

F2.PIPING MATERIAL CODE1) Buttwelded Fittings A234-Wp5, Sch.40, B16.9

Buttweld, 5crom ½ Molydenum Alloysteel Per Astm Grade Wp5,Schedule 40, Per Ansi B16.9

2) Spectacle Blind A240-304h 600lb Rf SmthStainless Steel, Per Astm A240 Grade 321, Class 600, Per Api 590

3) Piping Cs. A106 Gr. B4) Valve Cs A216 Wcb5) Flange Asme B16.5, Class 150 Ratting6) Small Fittings As A182 F57) Gasket Spiral Wound

G.1 PIPE ENDS1) Bevelled Ends2) Plain Ends3) Screwed Ends4) Flanged Ends5) Spigot/Socket Ends6) Buttress End

H.1 PIPE MATERIALS1) Astm A53 Welded And Seamless Pipe2) Astm A106 Seamless Cs Pipe For High Temp. Services3) Api 5l Line Pipe4) Is 1239 Steel Pipes For General Pupose5) Is 3589 Steel Pipes For General Services

H.2 DIMENSIONAL STANDARD1) Ansi B16.1 Cast Iron Flanged End Fittings2) Ansi B16.3 Malleable Iron Threded Fittings3) Ansi B16.4 Cast Iron Threded Fittings4) Ansi B16.5 Steel Flanged End Fittings5) Ansi B16.9 Buttwelding End Fittings6) Ansi B16.11 Socketweld And Screwed End Fittings

H.3 SW/SCRD FITTING MATERIALS1) Astm 105 Forged Carbon Steel2) Astm A181 Forged Carbon Steel For General Purposes3) Astm A182 Forged Alloy Steel And Stainless Steel4) Astm A234 Wrought Carbon Steel And Elevated Alloy Steel Pipe

Fitting For Moderate And Elevated Temperatures5) Astm A350 Forged Alloy Steel For Low Temperature Services

H.3 BUTTWELDED END FITTINGS1) Astm A234 Carbon Steel Fittings2) Astm A403 Austenitic Stainless Steel Fittings3) Astm A420 Alloy Steel For Low Temperature Services.

H.4 FLANGED END FITTINGS1) Astm 216 Carbon Steel Castings2) Astm 351 Stainless Steel Castings 3) Astm A352 Alloy Steel Castings4) Astm F 1545 Plasting Lined Fittings5) Is 1538 Ci Fittings

H.5 PIPING PACKAGES1) Exchanger Piping2) Reactor Piping3) Tower Piping 4) Column Piping 5) Pump Suction Discharge Piping6) Pipe Rack Piping7) Boiler Piping8) Cooling Tower Piping9) Chiller Piping10) Steam Trap Assembly11) Control Valve Assembly12) Steam Manifold Assembly13) Utility Manifold Assembly14) Offsite Area Piping15) Tank Farm Area Piping16) Trench Piping17) Under Ground Piping18) Domestic Piping19) Diesel Engine Piping20) Compressor Piping

Piping ConceptsPiping Concepts

Site PlanSite PlanConsiderationsAll aspects of safety, operability, maintenance, constructability and economics. All aspects of safety, operability, maintenance, constructability and economics. Layout and spacing of the roads, process plants, tanks and piperacks.Layout and spacing of the roads, process plants, tanks and piperacks.Equipment location & spacing, associated piping, controls & maintenance & constructabilityEquipment location & spacing, associated piping, controls & maintenance & constructabilityGood accessibility to valves and instruments, avoiding hazardous obstructions like misplaced manifolds, Good accessibility to valves and instruments, avoiding hazardous obstructions like misplaced manifolds, valve stems & support columns.valve stems & support columns.

Constructability to ensure no obstruction to transportation, lifting & erection of equipment due to adjacent Constructability to ensure no obstruction to transportation, lifting & erection of equipment due to adjacent plant, structures or equipment and compliance to sequenced construction plan.plant, structures or equipment and compliance to sequenced construction plan.Potential late delivery of large equipment items to avoid serious impact on construction schedule.Potential late delivery of large equipment items to avoid serious impact on construction schedule.One overall site plan for the entire complex, interconnecting piperacks and their relative locations to be One overall site plan for the entire complex, interconnecting piperacks and their relative locations to be made.made.Process units and offplot facilities, to be constructed to common schedule to be grouped and located to Process units and offplot facilities, to be constructed to common schedule to be grouped and located to ensure minimum impact from and to the operating plant during construction for later phases.ensure minimum impact from and to the operating plant during construction for later phases.Prevailing wind direction to be considered for special cases. Prevailing wind direction to be considered for special cases. For e.g., Flares for the refinery to be located upwind of the process units.For e.g., Flares for the refinery to be located upwind of the process units. Layout of the tankage area to suit the flow of products and feed stocks with the pumps stations located Layout of the tankage area to suit the flow of products and feed stocks with the pumps stations located outside of the bunded area.outside of the bunded area.

Roads to be provided around the tanks for access to all areas for maintenance & fire fighting.Roads to be provided around the tanks for access to all areas for maintenance & fire fighting.Unit Plot PlanOne unit plot plan for each process unit. One unit plot plan for each process unit.

Equipment layout & spacing to allow for maintenance & constructabilityEquipment layout & spacing to allow for maintenance & constructabilityAir coolers to be on top of a pipe rack. No equipment is to be located above or below Air coolers to be on top of a pipe rack. No equipment is to be located above or below coolers to facilitate access to place the air coolers and remove the tube bundle for coolers to facilitate access to place the air coolers and remove the tube bundle for maintenance. maintenance.

Furnaces and boilers to be located at plot boundaries for ease of access. Adequate Furnaces and boilers to be located at plot boundaries for ease of access. Adequate dropout and swinging space for tube pulling by mobile crane.dropout and swinging space for tube pulling by mobile crane.

Fired heaters to be located upwind of process units. In congested process areas, heater Fired heaters to be located upwind of process units. In congested process areas, heater locations to provide the lowest risk of fire or explosion.locations to provide the lowest risk of fire or explosion.

Exchangers to be with channel end away from piperacks to facilitate tube bundle removalExchangers to be with channel end away from piperacks to facilitate tube bundle removal

Pumps handling flammable materials not to be located below piperacks but to be placed Pumps handling flammable materials not to be located below piperacks but to be placed

with centreline of discharge at min. 1.5 m from the centre line of pipework column.with centreline of discharge at min. 1.5 m from the centre line of pipework column.

Compressors to be located adjacent to roadway and downwind from heaters & to be in Compressors to be located adjacent to roadway and downwind from heaters & to be in shelters to provide protection for equipment & personnel. Bridge or gantry crane for shelters to provide protection for equipment & personnel. Bridge or gantry crane for removal of compressor components. removal of compressor components. Vertical vessels to be placed on a common centreline parallel to the main piperack USO.Vertical vessels to be placed on a common centreline parallel to the main piperack USO.

Horizontal vessels to be located to minimise piping runs & to be lined up with their Horizontal vessels to be located to minimise piping runs & to be lined up with their tangents on a common locating line. tangents on a common locating line.

Reactors to be located for ease of access during catalyst unloading and loading Reactors to be located for ease of access during catalyst unloading and loading operations. Space to be provided for cranes and storage of spent and new catalyst.operations. Space to be provided for cranes and storage of spent and new catalyst.

Pipe Stress AnalysisPurpose

To ensure that piping is routed and supported so that no damage occurs to either the pipe or To ensure that piping is routed and supported so that no damage occurs to either the pipe or associated equipment due to the effects of thermal expansion or contraction, or loads resulting from associated equipment due to the effects of thermal expansion or contraction, or loads resulting from weight, pressure, wind earthquake, pulsation, shock, foundation settlement, etc.weight, pressure, wind earthquake, pulsation, shock, foundation settlement, etc.

ProcedureEnsuring compliance to all Code, Client and Inspection Authority requirements pertaining to Piping Ensuring compliance to all Code, Client and Inspection Authority requirements pertaining to Piping Stress Analysis.Stress Analysis.

Establishing all operating functions including start-up, Establishing all operating functions including start-up, shutdown, steam-out, various combinations of equipment working and idle, bypasses in and out of shutdown, steam-out, various combinations of equipment working and idle, bypasses in and out of use, de-coking, etc., for lines to be analyzed.use, de-coking, etc., for lines to be analyzed.

Stress Critical Line List Review.Stress Critical Line List Review.

Nozzle loads calculations.Nozzle loads calculations.

Check for flange leakage where bending moments are large, including flanged connections at Check for flange leakage where bending moments are large, including flanged connections at equipment.equipment.

Anchor loads on structures and/or foundations.Anchor loads on structures and/or foundations.

Finalising the location of spring supports with required loads and movements on the Stress sketch.Finalising the location of spring supports with required loads and movements on the Stress sketch.

Analysing requirement of reinforcement at branch connections, (other than for internal/external Analysing requirement of reinforcement at branch connections, (other than for internal/external pressure considerations covered by the Piping Material Specification), or at concentrated loading pressure considerations covered by the Piping Material Specification), or at concentrated loading points.points.

Considering expansion joints in stress analysisConsidering expansion joints in stress analysis

Checking position of fixed and sliding supports of heat exchangers, horizontal drums, etc.Checking position of fixed and sliding supports of heat exchangers, horizontal drums, etc.

Review of vendor drawings for equipment nozzle loadings.Review of vendor drawings for equipment nozzle loadings.

Piping Layout (GA)Piping Layout (GA)Purpose

For piping installation within a construction area.For piping installation within a construction area.Information for construction planning.Information for construction planning.Information for testing and pre-commissioning.Information for testing and pre-commissioning.

Information for Plant OperatorsInformation for Plant Operators..Methodology

Piping arrangement drawings produced in two stages:Piping arrangement drawings produced in two stages:

–– Planning drawing (study sketches / 2D CAD )Planning drawing (study sketches / 2D CAD )To solve major design problems, transmit information & co-ordinate activities of the To solve major design problems, transmit information & co-ordinate activities of the different design departments.different design departments.Preliminary piping arrangement for inter-discipline review & comment.Preliminary piping arrangement for inter-discipline review & comment.

–– Final drawings (3D CAD model or Non-CAD manual drawing)Final drawings (3D CAD model or Non-CAD manual drawing)For 2" and larger lines with dimensions and labellingFor 2" and larger lines with dimensions and labelling

GA Using 3D CAD ModelGA Using 3D CAD Model

–– G.A. drawings to be extracted from 3D CAD model.G.A. drawings to be extracted from 3D CAD model.

–– All verification, geometric & clash checks to be completed (including equipment checks to All verification, geometric & clash checks to be completed (including equipment checks to vendor data) before IFC GA extraction.vendor data) before IFC GA extraction.

Non-CAD GAsNon-CAD GAs

– Additional Pipe support GA’s issued for construction to reflect pipe support requirements Additional Pipe support GA’s issued for construction to reflect pipe support requirements

only.only. Design DataDesign Data

High point of grade.High point of grade.Column and vessel orientation Column and vessel orientation design sketchesdesign sketches including: including:

–– nozzles and manwaysnozzles and manways

–– column and vessel pipingcolumn and vessel piping

–– platform and ladder sizeplatform and ladder size

–– instrument orientation and locationinstrument orientation and location

–– height of tower and vessel skirtsheight of tower and vessel skirtsOrientation of major equipment nozzles, i.e. pumps, exchangers, compressors, etc.Orientation of major equipment nozzles, i.e. pumps, exchangers, compressors, etc.

Top of grout for all equipment foundations & pads.Top of grout for all equipment foundations & pads.

Pipe rack widths, bent spacing and top of support elevation of main pipe racks.Pipe rack widths, bent spacing and top of support elevation of main pipe racks.

Allocation of space for electrical, instrument racks, analyser houses, switchgear, and utility hose Allocation of space for electrical, instrument racks, analyser houses, switchgear, and utility hose stations.stations.

Location of all main structural columns.Location of all main structural columns.

Elevations of structural levels and extent of platforms, ladders and stairs required.Elevations of structural levels and extent of platforms, ladders and stairs required.Contents of Piping Layout

Equipment co-ordinates.Equipment co-ordinates.Elevations (Piping, Equipment, Platforms, etc.).Elevations (Piping, Equipment, Platforms, etc.).Line No. Identification and Flow Arrow.Line No. Identification and Flow Arrow.Instrument Identification Instrument Identification Match lines.Match lines.Drawing Continuation References.Drawing Continuation References.Key Plan Identification.Key Plan Identification.Complete "Holds" List.Complete "Holds" List.Reference Drawings.Reference Drawings.

Structural Column IdentificationStructural Column Identification..Piping Layout - Checkpoints

Conformance with P&ID's for Conformance with P&ID's for Line number, size, classification, direction of flow.Line number, size, classification, direction of flow.Instrument connections and numbers (long form).Instrument connections and numbers (long form).Piping material classification changes.Piping material classification changes.

Drawing "Holds" list.Drawing "Holds" list.Drawing title block & Drawing key plan.Drawing title block & Drawing key plan.Compliance with standard drawings and plot plan.Compliance with standard drawings and plot plan.Adjacent drawings & key plans for correct co-ordinates & drawing references.Adjacent drawings & key plans for correct co-ordinates & drawing references.Fire & Safety requirements & location of fire fighting equipment.Fire & Safety requirements & location of fire fighting equipment.Location of Drain hubs, Utility stations, safety showers, eyewashes, drinking fountains & ladders.Location of Drain hubs, Utility stations, safety showers, eyewashes, drinking fountains & ladders.No fouling of piping with structures, equipment and other lines.No fouling of piping with structures, equipment and other lines.Requirements for operating aisles, headway and roadway clearances and other mandatory Requirements for operating aisles, headway and roadway clearances and other mandatory

dimensional clearancesdimensional clearances..Piping IsometricsPiping IsometricsPurpose

Adequate information to fabricate shop pipework.Adequate information to fabricate shop pipework.

Adequate information to field run small bore piping.Adequate information to field run small bore piping.

Adequate information to erect the pre-fabricated pipe spools.Adequate information to erect the pre-fabricated pipe spools.

Adequate means of identifying materials for above mentioned isometrics.Adequate means of identifying materials for above mentioned isometrics.

Adequate information for locating & identifying pipe supports welded to shop fabricated pipework.Adequate information for locating & identifying pipe supports welded to shop fabricated pipework.MethodologyShop and field isometrics to be extracted/drawn & self-contained within a model base, plant or unit as Shop and field isometrics to be extracted/drawn & self-contained within a model base, plant or unit as defined at start of job.defined at start of job.

Shop isometrics to be adequately dimensioned to enable spooling and/or shop fabrication.Shop isometrics to be adequately dimensioned to enable spooling and/or shop fabrication.

Field isometrics to be extracted/drawn with overall dimensions only for material purposes & to Field isometrics to be extracted/drawn with overall dimensions only for material purposes & to assist field erection.assist field erection.Isometrics using 3D CAD ModelIsometrics using 3D CAD Model

–– Isometrics to be extracted from 3D CAD model.Isometrics to be extracted from 3D CAD model.

–– Isometrics need not be fully checked dimensionally.Isometrics need not be fully checked dimensionally.

–– P & ID check of the isometric and yellow off to be done.P & ID check of the isometric and yellow off to be done.

–– Material to be downloaded from model.Material to be downloaded from model.

–– Isometric to be downloaded for piping spool drawings.Isometric to be downloaded for piping spool drawings.

Non-CAD IsometricsNon-CAD Isometrics

–– Manually prepared on Isometric Sheet.Manually prepared on Isometric Sheet.

–– Both dimensional and P&ID checks to be done.Both dimensional and P&ID checks to be done.

–– Material to be manually entered.Material to be manually entered.

Contents of Piping Isometrics Line Number & Size

Pipe Classification

Direction of Flow

Equipment Reference & Nozzle Identification

Structural Number Identification

Isometric Drawing Continuation References

All Valving (except vent and drain valves)

Strainers, Traps & Flexible Hoses

Break with Shop and Field

Field Welds (but not shop welds)

Vents (as V) & Drains (as D)

Orifice Assemblies

Spectacle Blinds and Spacers

Instrument Numbers, such as PI, TIs, TWs, etc.

Instrument Connections

Out of Specification Items

Sample Points

Special Shop Attachment of Pipe Support

Dummy Legs

Cold Pull

Special Line Features, such as Fall, Reinforcing Pads, Weep Holes, Welded Lugs, etc.

Spool Identification (suffix letter only)

Insulation (include limit)

Piping MaterialPiping MaterialScopeScope

Material take-offMaterial take-offUpdating & control of material quantities with design Updating & control of material quantities with design Monitoring of material requisitions.Monitoring of material requisitions.

MethodMethodAutomatedAutomated Material Control Material Control

–– MTO download from 3D CAD ModelMTO download from 3D CAD Model

–– Manual Material Entry (for non-modelled items).Manual Material Entry (for non-modelled items).Link to Procurement Tracking SystemLink to Procurement Tracking System

Piping Stock CodePiping Stock CodeProject Stock Code Index generated by Piping Material Classes to be issued as a project Project Stock Code Index generated by Piping Material Classes to be issued as a project specification.specification.

ResponsibilityResponsibilityLead Piping Engineer to schedule and co-ordinate all piping material take-off activities and material Lead Piping Engineer to schedule and co-ordinate all piping material take-off activities and material

requisitioning.requisitioning.Civil Group to give take-off of underground carbon steel non-pressure piping using the appropriate Civil Group to give take-off of underground carbon steel non-pressure piping using the appropriate

piping class.piping class.Instrument Group to give take-off of all instrument piping beyond the primary (root) block valve Instrument Group to give take-off of all instrument piping beyond the primary (root) block valve (except at level instruments). (except at level instruments). Electrical Group to give take-off of all electrical cable duct piping.Electrical Group to give take-off of all electrical cable duct piping.Piping Materials Engineer to transmit a summary of all tubing and tubing fittings requirements to Piping Materials Engineer to transmit a summary of all tubing and tubing fittings requirements to Instrument Group for requisitioning.Instrument Group for requisitioning.

Material ControlMaterial ControlInitial material take off from :Initial material take off from :

–– Completed preliminary line routings in the CAD modelCompleted preliminary line routings in the CAD model

–– Manual take off from P&IDsManual take off from P&IDsTotal forecast material requirements including working surplus and contingency form the basis of Total forecast material requirements including working surplus and contingency form the basis of the Bulk Material Requisitions.the Bulk Material Requisitions.Frequency & timing of material extractions from CAD model & manual MTO ensure that bulk Frequency & timing of material extractions from CAD model & manual MTO ensure that bulk material status is concurrent with design.material status is concurrent with design.Field material control is possible as the data within the piping material control programme is Field material control is possible as the data within the piping material control programme is downloaded to Procurement Tracking System.downloaded to Procurement Tracking System.Material requisitions issued to procurement for enquiry/ purchase. Material requisitions issued to procurement for enquiry/ purchase. MR quantities issued for purchase (initial & at each revision) are downloaded to Procurement MR quantities issued for purchase (initial & at each revision) are downloaded to Procurement

Tracking System.Tracking System.

Statutory RequirementsStatutory RequirementsApplicable CodesApplicable Codes

International piping codes and standards accepted in IndiaInternational piping codes and standards accepted in India

–– ASME/ANSI B31.1, “Power Piping” ASME/ANSI B31.1, “Power Piping”

–– ASME/ANSI B31.3, “Chemical Plant and Petroleum Refinery Piping”ASME/ANSI B31.3, “Chemical Plant and Petroleum Refinery Piping”Oil Industry Safety Directorate,Standard 118.Oil Industry Safety Directorate,Standard 118.

–– Layout & spacing of roads,buildings,storage tanks and all equipmentLayout & spacing of roads,buildings,storage tanks and all equipment

Authority ApprovalAuthority ApprovalIndian Boiler Regulations (IBR)Indian Boiler Regulations (IBR)

– Materials and fabrication associated with steam and boiler feed systems.Materials and fabrication associated with steam and boiler feed systems. Chief Controller of Explosives. (CCOE) Chief Controller of Explosives. (CCOE)

–– All Plot Plans for approval together with safety radii from various sources. (Hazardous Area All Plot Plans for approval together with safety radii from various sources. (Hazardous Area Drawings). Drawings). Tariff Advisory Committee (TAC)Tariff Advisory Committee (TAC)

– Fire protection system & material selectionFire protection system & material selection. .