PIPING CLASS SPECIFICATION CHECKLIST ENGINEERING DEPARTMENT

No. Items to check OKNot OK

Not Required

1 Verify revision number, purpose of revisions, numbering, title.      2 Verify revision record sheet/ change summary sheet (If any)      3 Scope      4 Applicable Codes and Standards      5 Acronyms and Abbreviations      6 Reference Specifications      7 Material requirement / General Notes      8 What mill test cert. must be provided?      9 Carbon Equipvalent      10 NACE MR-01-75/ISO requirement      11 Stainless Steel requirement ?      12 Duplex Stainless Steel requirement ?      13 GRE Piping Requirement (If any)      14 The piping material line class designators which defines how the line class

or specification are structured      

15 Branch Chart which will define what type of branch connection to use for each header-branch size combination

     

16 Are there any note in the Branch chart      17 Process Flow Summary      18 Customer Specification      19 Specific material selection where appropriate      20 Design limitations for candidate materials      21 Corrosion and material selection evaluations      22 Line class Index which lists all the line classes currently being used on the

project along with a brief summary     

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PIPING CLASS SPECIFICATION CHECKLIST ENGINEERING DEPARTMENT

23 Are there any remark in the line class index ?      24 Pipe Class Datasheet      

24.1 Class      24.2 Design Code      24.3 Rating and Facing      24.4 Material      24.5 Corrosion Allowance      24.6 Service      24.7 Pressure/ Temperature limit      24.8 Do it conform to Pipe Class Index?      25 Pipe (Refer to Appendix 1: Material Selection Diagram)      

25.1 Which standard?      25.2 Size range of Pipe      25.3 Schedule of each pipe size (Pipe wall thickness)

Has the wall thickness be calculated in accordance with the applicable ASME B31 Code ?

     

25.4 Do the wall thickness conform to Wall thickness calculation report ?      25.5 Ends of pipe (PE – BE) for each pipe size      25.6 Material specification for each pipe size      25.7 Welded pipe shall not be substituted for seamless pipe. Seamless pipe may

be substituted for welded pipe in all services, sizes and materials.     

26 Socket Weld Fittings (Cap/Coupling/Elbow/Tee/Sockolet/Nipolet/Nipple/Reducer/Swage…)

     

26.1 Which standard?      26.2 Size range of socket weld fittings      26.3 Material specification for socketweld fittings      27 Butt Weld Fittings (Cap/Elbow/Tee/Weldolet/Reducer…)      

27.1 Which standard?      27.2 Size range of Butt Weld fittings      

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PIPING CLASS SPECIFICATION CHECKLIST ENGINEERING DEPARTMENT

27.3 Material specification for buttweld fittings      27.4 Welded fittings shall not be substituted for seamless fittings. Seamless

fittings may be substituted for welded fittings in all services, sizes and materials.

     

27.5 Buttweld fittings shall have a wall thickness to match the wall thickness of the adjoining pipe

     

27.6 Are Long radius elbows required for all buttweld elbows ?      28 Flange      

28.1 Which standard?      28.2 Size range of Socketweld Flange      28.3 Size range of Weldneck flange      28.4 Flange surface finish ?      28.5 Does the bore of the weldneck flange match to pipe ?      28.6 Orifice flanges shall be ordered in pairs      28.7 The minimum class of Orifice Flange shall be 300#      29 Spectacle Blind / Spade / Spacer      

29.1 Which Standard ?      29.2 Size range of Spectacle Blind / Spade / Spacer 30 Do the material of pipe/ fittings/ Flange.. in the Piping Class Specification

comply with basic material chart? (Refer to Appendix 2:Basic Material) 31 Gasket

31.1 Which standard ? 31.2 Gasket material 31.3 Do it conform to Opterating condition ? 32 Stud Bolts & Nuts

32.1 Do the material of Bolts & Nuts comply with the material of Flange ? 32.2 Do Bolts & Nuts comply with Specification for Protective coating ? 33 Valves

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PIPING CLASS SPECIFICATION CHECKLIST ENGINEERING DEPARTMENT

33.1 Valve Tag Description 33.2 Class Identifier 33.3 Valve Type 33.4 End Connection 33.5 Additional Valve Design Features 33.6 Size of valve 33.7 Do it conform to Manual Valve Specification ? 34 Notes

34.1 Are all the Notes clear and understandable?    

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PIPING CLASS SPECIFICATION CHECKLIST ENGINEERING DEPARTMENT

APPENDIX 1MATERIAL SELECTION DIAGRAM

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PIPING CLASS SPECIFICATION CHECKLIST ENGINEERING DEPARTMENT

APPENDIX 2BASIC MATERIAL

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