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Here a short checklist is provided which is a minimum to a design according to the ASME Boiler and Pressure Vessel Code Section VIII-1. For more detailed process, or specific design condition, contact deconeq Engineering Group design team or simply send an email to info@deconeq.com.
1- Defining design conditions:
These information usually appear on the design documents and/or General Arrangement Drawings.
1. Document/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 (Minimum Design Metal Temperature)
7. Materials of construction
8. Main dimensions of the equipment or component9. Applicable Loads
10. Check permissible S- value listed in applicable Code Section
11. Services Restrictions
12. Nameplate data, location of nameplate
13. Check if National Board registration is required
14. Check if CRN- Registration is required for application or installation in Canada
15. Identification of joints
16. Assignment WPS to joints and preparing the welding methids
2. Test Pressure (Minimum):
1. Hydrostatic Test: which is defined as 1.3*MAWP*LSR 2. Pneumatic Test: wgich is defined as 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 Joint3. Hubbed flanges from rolled plate 4. Corrosion Allowance:
5.Tolerances:
1. Wall thickness, plate and pipe
2. Misalignment3. Tapered transitions4. Staggered longitudinal joints5. 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 heads5. Bolts6. 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 911. loadings e.g. vessel supports12. shell sections and heads extreme fibre elongation 8. Minimum wall thickness:1. Shell2. Dished head 3. Nozzle4. Remaining wall thickness underneath tapped holes9. Minimum weld dimensions: 1. Flange attachment to the nozzle2. Nozzle attachment to the shell or head3. 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. plates15. Split/ segmental reinf. plates<16. Referenced standards 17. Proof Test 18. Partial Data Report