Design Calculation

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Short checklist to complete a design calculation according to the ASME Boiler and Pressure Vessel Code Section VIII-1.

0. Computer program verification 

 incl. evidence of alternate calculation per method applied

1. Drawing + Calculation 

  1. Drawing No. and Revision
  2. ASME Code Edition and Addenda 
  3. Code Cases 
  4. Units: SI/U.S. Customary 
  5. Design- operational data 
  6. MDMT(see also point 12) 
  7. Materials 
  8. Dimensions(ID, T, OD etc) 
  9. Loads (use separate checklist as well) 
  10. Check permissible S- value listed in applicable Code Section 
  11. Services Restrictions 
  12. Nameplate data, location of nameplate 
  13. National Board registration Y/N 
  14. CRN- Registration Y/N 
  15. Identification of joints on the drawing 
  16. Assignment WPS to joints on the drawing 
  17. Compliance of groove design drawing with ranges on WPS  

2. Test Pressure (Minimum) 

  1. Hydrostatic Test
    1.3*MAWP*(S[T test] / S [T design] )
  2. Pneumatic Test
    1.1* MAWP*(S[T test/ S[T design])

3. Type of Weld Joint 

  1. RT Examination Selection, location of "Spot"
  2. NDE(PT/MT) on Corner Joints Joggle Joint 
  3. Hubbed flanges from rolled plate 

4. Corrosion Allowance


  1. Wall thickness, plate and pipe 
  2. Misalignment 
  3. Tapered transitions 
  4. Staggered longitudinal joints 
  5. Out-of-roundness for internal pressure 
  6. Out-of-roundness for ext. pressure calculated + data transfered to prod./QC

6. Inspection Openings

7. Check whether design calculations have been made for all presure bearing parts:

  1. Shell, conical reducer section(conical reducer section shall also meet the requirements of Appendix 1-5 and/or 1-8) 
  2. Dished heads, conical heads Compensation of openings(large openings see also App. 1-7 or 1-10) 
  3. Flanges (App. 2 or ASME B16.5) 
  4. Covers, flat heads 
  5. Bolts 
  6. Tube sheets: applicability and use od UHX(otherwise, see also TEMA) 
  7. Expansion joint (see also EJMA)
  8. Nozzle attachment welds(allowable stresses in welds) 
  9. External pressure 
  10. Jacketed vessel Appendix 9 
  11. loadings e.g. vessel supports 
  12. shell sections and heads extreme fibre elongation

8. Minimum wall thickness 

  1. Shell
  2. Dished head
  3. Nozzle
  4. Remaining wall thickness underneath tapped holes

9. Minimum weld dimensions 

  1. Flange attachment to the nozzle
  2. Nozzle attachment to the shell or head
  3. Attachment of flat heads + covers

10. Pressure rating of standard parts based on material and temperature 
(ASME Products) Calculated at straight seamless pipe 

11. Heat treatment

12. Impact Test Requirements 
(cryogenic vessels) Exemptions documented for all mat.

13. Exposed inside edges chamfered or rounded

14. Telltale holes in nozzle reinf. plates

15. Split/ segmental reinf. plates

16. Referenced standards

17. Proof Test

18. Partial Data Report

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