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Welding Inspection Prior to Welding Work

  1. Welding symbols and weld sizes clearly specified in drawing and related documents.
  2. Weld joint designs and dimensions clearly specified in drawings and related documents.
  3. Weld maps identify the welding procedure specification (WPS) to be used for specific weld joints.
  4. Dimensions detailed and potential for distortion addressed.
  5. Welding consumables specified.
  6. Proper handling of consumables, if any, identified.
  7. Base material requirements specified (such as the use of impact tested materials where notch ductility is a requirement in low temperature service).
  8. Mechanical properties and required testing identified.
  9. Weather protection and wind break requirements defined.
  10. Preheat requirements and acceptable preheat methods defined.
  11. Post-weld heat treatment (PWHT) requirements and acceptable PWHT method defined.
  12. Inspection hold-points and NDE requirements defined.
  13. Additional requirements, such as production weld coupons, clearly specified.
  14. Pressure testing requirements, if any, clearly specified
  15. Competency of welding organization to perform welding activities in accordance with codes, standards, and specifications specified
  16. Roles and responsibilities of engineers, welding organization, and welding inspectors defined and appropriate for the work.
  17. Independence of the inspection organization from the production organization is clear and demonstrated.
  18. WPS(s) are properly qualified and meet applicable codes, standards and specifications for the work.
  19. Procedure qualification records (PQR) are properly performed and support the WPS(s).
  20. Welder performance qualifications (WPQ) meet requirements for the WPS.
  21. NDE examiners are properly certified for the NDE technique.
  22. NDE procedures are current and accurate.
  23. Calibration of NDE equipment is current.
  24. Welding machine calibration is current
  25. Instruments such as ammeters, voltmeters, contact pyrometers, have current calibrations.
  26. Storage ovens for welding consumables operate with automatic heat control and visible temperature indication.
  27. Heat treatment procedure is available and appropriate
  28. Pressure testing procedures are available and detail test requirements.
  29. PWHT equipment calibration is current.
  30. Pressure testing equipment and gauges calibrated and meet appropriate test requirements.
  31. Material test certifications are available and items properly marked (including back-up ring if used ;).
  32. Electrode marking, bare wire flag tags, identification on spools of wire, etc. as-specified.
  33. Filler material markings are traceable to a filler material certification.
  34. Base metal markings are traceable to a material certification.
  35. Recording of filler and base metal traceability information is performed.
  36. Base metal stampings are low stress and not detrimental to the component.
  37. Paint striping color code is correct for the material of construction.
  38. PMI records supplement the material traceability and confirm the material of construction.
  39. Weld preparation surfaces are free of contaminants and base metal defects such as laminations and cracks.
  40. Preheat, if required, applied for thermal cutting c. Hydrogen bake-out heat treatment, if required, performed to procedure.
  41. Weld joint is free from oxide and sulfide scales, hydrocarbon residue, and any excessive build-up of weld-through primers.
  42. Weld joint type, bevel angle, root face and root opening are correct.
  43. Alignment and mismatch is correct and acceptable.
  44. Dimensions of base materials, filler metal, and weld joint are correct.
  45. Piping socket welds have proper gap.
  46. Preheat equipment and technique are acceptable.
  47. Preheat coverage and temperature are correct.
  48. Reheat, if required, applied to thermal cutting operations.
  49. Preheat, if required, applied to remove moisture
  50. Filler metal type and size are correct per procedure.
  51. Filler metals are being properly handled and stored.
  52. Filler metals are clean and free of contaminants.
  53. Coating on coated electrodes is neither damaged nor wet.
  54. Flux is appropriate for the welding process and being properly handled.
  55. Inert gases, if required are appropriate for shielding and purging.
  56. Gas composition is correct and meets any purity requirements.
  57. Shielding gas and purging manifold systems are periodically bled to prevent back filling with air.