Piping Guide

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PIPING GUIDE

Made by Νιτιν Σ. Πεδνεκαρ

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 Elevations 17) Iso North

18) Bill Of Material 19) Valve Tag Nos. 20) Instruments Tag Nos.

21) Contination Sheets Or Iso. Nos. 22) Grid Location And Nos.

A.2 DOCUMENTS FOR ISOMETRICS CHECKING

1) Piping And Instrument Diagrames 2) Piping Layouts 3) Sectional Drawings 4) Equipment Drawings 5) Nozzle Orientations 6) Piping Specification 7) Suppotrs Standard 8) Special Items Drawings 9) Sress Analysis Report

A.3 POINTS TO REMEMBERS IN ISOMETRICS CHECKING

1) Pump Suction Is Bigger Than Discharge Line

2) 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 Columns

16) 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.

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B.1 TYPES OF CONTROL VALVE

1) Pcv Pressure control Valve

2) Tcv Temperature Control Valve 3) Fcv Flow Control Valve 4) Lcv Level Control Valve 5) Xv Isolation Valve

6) Xcv High Pressure Control Valve

B.2 TYPES OF PUMPS

1) Reciprocating Pump 2) Rotary Pump 3) Centrifugal Pump 4) Vacuum Pump 5) Metering Pump

B.3 TYPES OF EXCHANGER

1) Air Cooler Exchanger 2) Plate Type Exchanger 3) Shell & Tube Exchanger 4) 2 Pipe Exchanger 5) Spiral Exchanger

B.4 TYPES OF COMPRESSOR

1) Elevated Centrifugal Compressor 2) Grade-Mounted Centrifugal Compressor 3) Reciprocating Compressor

B.5 TYPES OF TOWER

1) Tray Tower 2) Packed Tower 3) Vacuume Tower

B.6 TYPES OF VALVE

1) Gate Valve 2) Globe Valve

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3) Check Valve (Non Return Valve) 4) Ball Valve 5) Butterfly Valve 6) Diaframe Valve 7) Plug Valve

B.7 TYPE OF FLANGES

1) 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 Flange

6) Blind Flange 7) Socketweld Flange

B.7A PRESSURE TEMPERATURE RATTING

150#, 300#, 400#, 600#, 900#, 1500#, 2500#.

B.7B FLANGES FACING

1) Ff Flat Face 2) Rf Raise Face

3) T/G Tongue And Groove Face 4) M/F Male And Female Faces 5) Rtj Ring Type Joint Faces

B.8 TYPES OF FITTINGS

1) 90° Elbow, 45° Elbow (Butt Welded, Socket Welded, Threded) 2) Equal Tee, Reducing Tee Do

3) Cap,Union,Plug, Half Coupling, Full Coupling, Lateral.

B.9 TYPES OF OLETS

1) Laterolet 2) Elbowlet 3) Weldolet 4) Sockolet 5) Threadolet

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6) Sweepolet 7) Nippolet

B.10 TYPES OF REDUCER

1) Eccentric Reducer (Butt Welded) 2) Concentric Reducer (Butt Welded)

3) Swages (Socket Weld, Threded)

B.11 TYPES OF INSTRUMENTS

1) Psv Pressure Safety Valve 2) Lg Level Guage 3) Li Level Indicator 3) Pg Pressure Guage 4) Pi Pressure Indicator 4) Cv Control Valve 5) Ti Temperature Indicator 6) Tw Thermowell 7) Fe Flow Elements 8) Fi Flow Indicators 9) Fo Flow Orifice Flanges

A GENERAL PURPOSE

1) Control Valves (Globe, Ball, Butterfly) 2) On/Off Valves (Ball, Butterfly) 3) Relief Valves (Pressure, Thermal) 4) Rapture Disc

5) Restriction Orifice

B FLOW MESSURING INSTRUMENTS

1) Orifice Plate

2) Variable Aria Flow Meter 3) Magnetic Flow Meter 4) Turbine Flow Meter

5) Positive Displacement Meter

C TEMPERATURE MEASURING INSTRUMENTS

1) Thermocouples

2) Resistance Temperature Detactors 3) Filled System

4) Bimetallic Thermometres 5) Thermowells

D PRESSURE MESSURING INSTRUMENTS

1) Manometer 2) Bourden Type 3) Bellow Type 4) Diaphragm Type

E LEVEL MEASURING INSTRUMENTS

1) Level Guage (Direct Type) 2) Hydrostatic Head (Inferential) 3) Buoyancy 4) Conductance 5) Capacitance 6) Radiation 7) Float

B.12 SPECIAL ITEMS

1) Steam Trap (Float Type, Thermodynamic,Bucket) 2) Orifice Flange

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4) Strainner (Y Type Srainner, Bucket Type Strainner)

B.13 TYPES OF PIPE ENDS

1) Pbe Plain Both End 2) Ple Plain Large End 3) Pse Plain Small End 4) Ble Bevelled Large End 5) Tse Threaded Small End

B.14 TYPES OF GASKETS

1) Full Face 2) Inside Bolt Circle 3) Spiral Wound Mettalic 4) Ring Type

5) Metal Jacketed

C.1 SERVICE CODE FOR UTILITY LINES

1) Lps Low Pressure Steam 2) Hps High Pressure Steam 3) Mps Medium Pressure Steam 4) Cws Cooling Water Supply

5) Cwr Cooling Water Return

6) Chws Chilled Water Supply 7) Chwr Chilled Water Return 8) Bs Brine Supply 9) Br Brine Return 10) Ia Instrument Air 11) Ca Compress Air 12) Dmw Potable Water35 13) Ps Process Water

C.2 SERVICE CODE FOR PROCESS LINE

1) Fg = Fuel Gas

2) Pa = General Hydrocarbon 3) Pb = Hydrocarbon With Sulfer 4) Pc = Hydrocarbon With Hydrogen 5) Pd = Hydrocarbon With Hydrogen & H2s 6) Pe = Hydrocarbon With Sour Water 7) Cb = High Strenght Caustic 8) Va = Sulphuric Acid 9) Ha = Hydrocloric Acid 10) Cc = Low Strenght Caustic 11) Ct = Catalyst 12) Hy = Hydrogen 13) Ch = Chemicals 14) Ni = Nitrogen 15) Ca = Amines 16) Su = Molten Sulphur 17) Ga = Gaseus Extinguishant 18) Dl = Diesel 19) Fg = Fuel Gas 20) Fs = Fuel Gas (Sour) 21) Fo = Fuel Oil 22) Rt = Refrigerant 23) Lg = Flue Gas 24) Lo = Lube Oil

25) Ba = General Hydrocarbon 26) Bb = Hydrocarbon With Sulphur 27) Bc = Hydrocarbon With Hydrogen 28) Bd = Hydrocarbon With Hydrogen & H2s 29) Be = Hydrocarbon With Sour Water

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D.1 SHORT CODE

1) Ibr Indian Boiler Regulation Act

2) Astm American Society Of Testing Material 3) Ansi American National Standard Institute 4) Smls Seamless

5) Thd Threded 6) Bw Butt Welded 8) Sw Socket Welded 9) Ecc. Red. Eccentric Reducer 10) Conc.Red. Concentric Reducer 11) Eq.Tee Equal Tee

12) Red. Tee Reducing Tee 13) Clpg Coupling 14) Vlv Valve 15) Str Strainner

16) T Trap

17) Elb Elbow

18) Fof.El. Finish Floor Elevation 19) Ptfl.El. Platform Elevation 20) Gr.El Ground Elevation 21) Sch Schedule

22) Thk Thickness 23) Eqpt Equipment 24) Sorf Slipon Rase Face 25) Soff Slipon Flat Face 26) Wnrf Weldneck Rase Face 27) Wnff Weldneck Flat Face 28) Bop.El. Bottom Of Elevation 29) Cl.El. Center Line Elevation 30) Pcd Pitch Circle Dia. 31) Nb Nominal Bore 32) Ns Nominal Size 33) Be Beveled End

34) Isi Indian Standard Institute 35) Fst Flat Side Top

36) Fsd Flat Side Down 37) Suc. Suction 38) Disch. Discharge

39) Wp.El. Work Point Elevation 40) Ga General Arrangement

41) P&Id Piping And Instrument Diagrames

D.2 AMERICAN STANDARD

42) Astm The American Society Of Testing Materials 43) Api The Americal Petroleum Institute

44) Aisi The American Iron And Steel Institute 45) Ansi The American National Standard Institute 46) Aws The American Welding Society

47) Awwa The American Water Works Association 48) Asme The American Society Of Mechanical Engineers

D.3 API STANDARDS

1) Api5l Specification For Pipe Line

2) Api6d Pipe Line Valves, End Closers, Connectors, And Swivels 3) Api600 Steel Gate Valve

4) Api 605 Large Diametre Carbon Steel Flanges

D.4 ANSI STANDARDS

1) Ansi/Asme 31.1 Power Piping-1995 2) Ansi/Asme 31.2 Fuel Gas Piping-1968

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D.5 BRITISH STANDARD

1) BS10 FLANGES

2) BS806 PIPES AND FITTINGS FOR BOILER 3) BS916 BLACK BOLTS,NUTS AND SCREWS 4) BS1560 STEEL PIPE FLANGES

5) BS1414 GATE VALVES FOR PETROLEUM INDUSTRIES 6) BS1600 DIMENSIONS OF STEEL PIPES

7) BS1965 BUTT WELDING PIPE FITTINGS

8) BS2080 FACE TO FACE /END TO END DIMENSIONS OF VALVES 9) BS2598 GLASS PIPE LINES AND FITTINGS.

10) BS3351 PIPING SYSTEM FOR PETROLEUM REFINERIES

E.1 DRAWINGS

1) Study Layout

2) General Arrangement Drawings 3) Piping And Instrument Diagrames 4) Sectional Layouts

5) Civil Layouts 6) Equipment Layouts

7) Fabrication Details Drawing 8) Foudation Details Drawings 9) Structural Layout

10) Isometrics

11) Piping Details Layout 12) Nozzle Orientations 13) Plot Plan

14) Flow Diagrame

F1 PROCESS DESIGN CODE FOR SERVICE

1) Sulfer Asme B31.3 2)

F2.PIPING MATERIAL CODE

1) 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 Smth

Stainless Steel, Per Astm A240 Grade 321, Class 600, Per Api 590

3) Piping Cs. A106 Gr. B 4) Valve Cs A216 Wcb

5) Flange Asme B16.5, Class 150 Ratting 6) Small Fittings As A182 F5

7) Gasket Spiral Wound

G.1 PIPE ENDS

1) Bevelled Ends 2) Plain Ends 3) Screwed Ends 4) Flanged Ends 5) Spigot/Socket Ends 6) Buttress End

H.1 PIPE MATERIALS

1) Astm A53 Welded And Seamless Pipe

2) Astm A106 Seamless Cs Pipe For High Temp. Services 3) Api 5l Line Pipe

4) Is 1239 Steel Pipes For General Pupose 5) Is 3589 Steel Pipes For General Services

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H.2 DIMENSIONAL STANDARD

1) Ansi B16.1 Cast Iron Flanged End Fittings 2) Ansi B16.3 Malleable Iron Threded Fittings 3) Ansi B16.4 Cast Iron Threded Fittings 4) Ansi B16.5 Steel Flanged End Fittings 5) Ansi B16.9 Buttwelding End Fittings

6) Ansi B16.11 Socketweld And Screwed End Fittings

H.3 SW/SCRD FITTING MATERIALS

1) Astm 105 Forged Carbon Steel

2) Astm A181 Forged Carbon Steel For General Purposes 3) Astm A182 Forged Alloy Steel And Stainless Steel

4) Astm A234 Wrought Carbon Steel And Elevated Alloy Steel Pipe Fitting For Moderate And Elevated Temperatures 5) Astm A350 Forged Alloy Steel For Low Temperature Services

H.3 BUTTWELDED END FITTINGS

1) Astm A234 Carbon Steel Fittings

2) Astm A403 Austenitic Stainless Steel Fittings

3) Astm A420 Alloy Steel For Low Temperature Services.

H.4 FLANGED END FITTINGS

1) Astm 216 Carbon Steel Castings 2) Astm 351 Stainless Steel Castings 3) Astm A352 Alloy Steel Castings 4) Astm F 1545 Plasting Lined Fittings 5) Is 1538 Ci Fittings

H.5 PIPING PACKAGES

1) Exchanger Piping 2) Reactor Piping 3) Tower Piping 4) Column Piping

5) Pump Suction Discharge Piping 6) Pipe Rack Piping

7) Boiler Piping

8) Cooling Tower Piping 9) Chiller Piping 10) Steam Trap Assembly 11) Control Valve Assembly 12) Steam Manifold Assembly 13) Utility Manifold Assembly 14) Offsite Area Piping 15) Tank Farm Area Piping 16) Trench Piping

17) Under Ground Piping 18) Domestic Piping 19) Diesel Engine Piping 20) Compressor Piping

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Piping Concepts

Site Plan

Considerations

All 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 & constructability Equipment location & spacing, associated piping, controls & maintenance & constructability

Good 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 Plan

One unit plot plan for each process unit. One unit plot plan for each process unit.

Equipment layout & spacing to allow for maintenance & constructability Equipment layout & spacing to allow for maintenance & constructability

Air 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 removal Exchangers 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 Analysis

Purpose

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.

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Procedure

Ensuring 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 analysis Considering 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)

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 Operators

Information for Plant Operators

.

Methodology

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

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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.

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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 labelling For 2" and larger lines with dimensions and labelling

GA Using 3D CAD Model

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

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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 GAs

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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 Data

High point of grade. High point of grade.

Column and vessel orientation

Column and vessel orientation design sketchesdesign sketches including: including:

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nozzles and manwaysnozzles and manways

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column and vessel pipingcolumn and vessel piping

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platform and ladder sizeplatform and ladder size

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instrument orientation and locationinstrument orientation and location

–

height of tower and vessel skirtsheight of tower and vessel skirts

Orientation of major equipment nozzles, i.e. pumps, exchangers, compressors, etc. Orientation of major equipment nozzles, i.e. pumps, exchangers, compressors, etc.

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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 Identification Structural Column Identification

.

Piping Layout - Checkpoints

Conformance with P&ID's for Conformance with P&ID's for

Line number, size, classification, direction of flow.

Instrument connections and numbers (long form).

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 clearances

dimensional clearances

.

Piping Isometrics

Purpose

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.

Methodology

Shop 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 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.

–

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–

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

Non-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 Material

Scope

Material take-off Material take-off

Updating & control of material quantities with design Updating & control of material quantities with design Monitoring of material requisitions.

Monitoring of material requisitions.

Method

Automated

Automated Material Control Material Control

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

–

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Link to Procurement Tracking System Link to Procurement Tracking System

Piping Stock Code

Project 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.

Responsibility

Lead 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 Control

Initial material take off from : Initial material take off from :

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

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Manual take off from P&IDsManual take off from P&IDs

Total 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 Requirements

Applicable Codes

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

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

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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.

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

Authority Approval

Indian Boiler Regulations (IBR) Indian Boiler Regulations (IBR)

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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)

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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)

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