The Welding Inspection Services Are Define in Three Stages As Below
The Welding Inspection Services Are Define in Three Stages As Below
The Welding Inspection Services Are Define in Three Stages As Below
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.
7. Base material requirements specified (such as the use of impact tested materials where
notch ductility is a requirement in low temperature service).
11. Post-weld heat treatment (PWHT) requirements and acceptable PWHT method defined.
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.
26. Storage ovens for welding consumables operate with automatic heat control and visible
temperature indication.
28. Pressure testing procedures are available and detail test requirements.
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.
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.
44. Dimensions of base materials, filler metal, and weld joint are correct.
50. Filler metal type and size are correct per procedure.
54. Flux is appropriate for the welding process and being properly handled.
55. Inert gases, if required are appropriate for shielding and purging.
9. Rod warmers energized or where rod warmers are not employed, the welder
complies with maximum exposure times out of the electrode oven.
10. Preheating during tack welding and tack welds removed (if required).
16. Mock-up weldment, if required, meets requirements with welder and welding
engineer.
20. Cleaning between weld passes and of any back-gouged surfaces is acceptable.
21. Additional NDE performed between weld passes and on back-gouged surfaces
shows acceptable results.
24. Final weld reinforcement and fillet weld size meets work specifications and drawings.
1. Size, length and location of all welds conform to the drawings / specifications / Code.
3. Dimensional and visual checks of the weld don’t identify welding discontinuities,
excessive distortion and poor workmanship.
4. Temporary attachments and attachment welds removed and blended with base
metal.
6. PMI of the weld, if required and examiner’s findings indicate they comply with the
specification.
14. RT film quality, IQI placement, IQI visibility, etc. complies with standards.
17. Verify post-weld heat treatment is performed to the procedure and produces
acceptable results.
27. Insulation applied to the component where required for local heating.
38. Perform a final audit of the inspection dossier to identify inaccuracies and incomplete
information.
40. Inspection reports are complete, accepted and signed by responsible parties.
41. Inspection reports, NDE examiners interpretations and findings are accurate.
ASME Section IX
Here are some important points in the ASME Section IX that are necessary to be taken in
account for any welding inspection company that conducts welding inspection on fix
equipment, process and power piping and above ground storage tank.
2. The PQR documents what occurred during welding the test coupon and the result of
testing of the coupon. It must be checked by welding inspection company.
4. WPS and PQR made in accordance with requirement of sec IX prior to 1962 in which
all requirement of 1962 edition are met may also be used
6. Tension test gives tensile value, while bend test shows ductility and soundness.
Radiography also indicates soundness.
10. When the welder or welding operator is qualified by radiography, the minimum length
of coupon to be examined shall be 6 inch and shall include the entire weld
circumference for pipe
12. Bend test crack shall not exceed 1/8” in any direction. Radiography criteria are
stricter than radiography for job.
16. Essential variables (EV), if changed require new procedure qualification. Non-
essential variables (NEV) may be changed without new procedure qualification. But
the procedure must be revised.
17. Supplementary essential variables (SEV) are considered as (EV) only if there is
impact strength requirement. Otherwise they are “non-essential” variables.
18. EV and SEV are included in PQR document. EV, SEV and NEV are included in WPS
document.
19. PQR document gives data used in PQR test and test results, and cannot be revised.
20. WPS gives parameters to be used in production job, and must be within ranges
qualified by the PQR test.
21. WPS may be revised within the EVs qualified. The NEVs can always be revised
without affecting validity of PQR.
22. Only in SMAW, SAW, GTAW, PAW and GMAW (except short-circuiting) or
combination of them Radiography test can be used for welder performance
qualification test, but there is exception, except P-No.21 through P-No.25 and P-
No.51 through P-No.53 and P-No.61 through P-No.62, welder making groove welds
P-No.21 through P-No.25 and P-No.51 through P-No.53 metals with GTAW process
may also be qualified by radiography.
23. For welder performance qualification when coupon has failed the visual examination
and immediate retest is intended to be done, the welder shall make two test coupon
for each position which he has failed, if both test coupons passed the visual
inspection one may be selected by examiner for mechanical, in a similar way if
mechanical test coupon has failed, two test coupons shall make by welder, both test
coupon shall pass the test.
24. For welder performance qualification by radiography for immediate retest, two 6 inch
plate and for pipe examination shall include two pipes for a total of 12 inch of weld
which shall include entire weld circumference
25. When the welder has not welded with a process during a period of 6 months or
more, his qualification for that process shall expire
26. Article IV should not be read directly, during the study of other articles specifically
“welding variables procedures specifications” (QW-252 through 265 ) should refer to
specific paragraph in this article, in similar way for welder performance qualification
in QW-352 through 356 should only to refer to addressed paragraph