Welding inspection checklist
Production line/area:
Responsible:
Date:
Corporate:
Yes No N/A Notes
Weld symbols and weld sizes clearly specified in drawings and related documents
Projects and dimensions of weld joints clearly specified in drawings and related documents
Phase 1 - Weld maps identify the welding procedure specification (WPS) to be used for the weld joints.
Inspection Dimensions detailed and potential for distortion addressed
procedure before Welding consumables specified
welding Adequate handling of consumables, if any, identified
Requirements of base material specified (e.g. the use of materials tested against impact where
ductility is required in low temperature service)
Mechanical properties and required testing identified
Weather protection and wind break requirements defined.
Preheat requirements and acceptable preheat methods defined
Post-weld heat treatment (PWHT) requirements and acceptable PWHT method defined
Inspection hold-points and NDE requirements defined.
Additional requirements such as production weld pass, clearly specified
Pressure testing requirements, if any, are clearly specified
Competence of the welding organization to execute welding activities according to codes,
standards, and specifications required
Roles of technicians, engineers, welding organization, and welding inspectors are defined
Independence of the inspection organization related to the production organization is clear and
demonstrated
WPS (s) are properly qualified and conform to codes, standards and specifications required for
the project
Procedure qualification records (PQR) are properly performed and support the WPS(s)
Welder performance qualifications (WPQ) meet requirements for the WPS
EQM examiners are properly certified for the EQM technique
EQM procedures are current and accurate
NDE equipment calibration is current
Welding machine calibration is current
Heat treatment procedure is available and appropriate
Pressure testing procedures are available and specify the test requirements
PWHT equipment calibration is current
Electrode marking, bare wire flag tags, and identification on spools of wire, etc. specified
Filler material markings are traceable to a filler material certification
Base metal markings are traceable to a material certification
Recording of filler and base metal traceability information is performed
Base metal stampings are low stress and not detrimental to the component
Paint striping color code is correct for the material of construction
PMI records supplement the material traceability and confirm the material of construction
Weld preparation surfaces are free of contaminants and base metal defects, such as
contaminant oils and cracks
Weld joint is free from oxide and sulfide scales, hydrocarbon residue, and any excessive build-up
of weld-through primers
Weld joint type, bevel angle, root face and root opening are correct
Alignment and mismatch are correct and acceptable
Dimensions of base materials, filler metal, and weld joint are correct
Piping socket welds have proper gap
Preheat equipment and technique are acceptable
Preheat coverage and temperature are correct
Reheat, if required, applied to thermal cutting operations
Preheat, if required, applied to remove moisture
Filler metal type and size are correct per procedure
Filler metal is being properly handled and stored
Filler metals are clean and free of contaminants
Coating on coated electrodes is not damaged or wet
Inert gases, if needed, are appropriate for the welding process
Gas composition is correct and meets any purity requirements
Protection gas and manifold purge systems go through bleeding periodically to avoid the
accumulation of air
Yes No N/A Notes
Welder is responsible for quality craftsmanship of welds
Welder understands welding procedure and requirements for the work
Special training and mock-up welds performed if required
Phase 2 - Welder understands the inspection hold-points
Inspection Purge technique, flow rate, O2 analysis, according to the type of weld
procedure during Rod warmers energized or where rod warmers are not employed, the welder complies with
welding maximum exposure times out of the electrode oven
Preheating during tack welding and tack welds removed (if required)
Welding technique, weld progression, bead overlap, etc.
Equipment settings such as amps, volts, and wire feed
Preheating temperatures and between passes
Travel speed (key element in heat input)
Heat input (where appropriate)
Mock-up weld, if required, meets requirements with welder and welding engineer
Tack welds to be incorporated in the weld are of acceptable quality
Weld root has adequate penetration and quality
Cleaning between weld passes and of any surface is acceptable
Additional NDE performed between weld passes and on back-gouged surfaces shows
acceptable results
In-process rework and defect removal are accomplished
Final weld reinforcement and fillet weld size meets work specifications and drawings
Yes No N/A Notes
Size, length and location of all welds conform to the drawings, specifications, and codes
No welds added without approval
Phase 3 -
Dimensional and visual checks of the weld don’t identify welding discontinuities, excessive
Inspection
distortion and poor workmanship
procedure after
Temporary attachments and attachment welds removed and blended with base metal
welding
Discontinuities reviewed against acceptance criteria for defect classification
PMI of the weld, if required and examiner’s findings indicate they comply with the specification
Welder stamping and marking of welds confirmed
Verify EQM is performed at selected locations and review examiner’s findings
Specified locations examined
Work of each welder included in random examination techniques
RT film quality, IQI placement, IQI visibility, etc. complies with standards
Documentation for all NDE correctly executed
Verify post-weld heat treatment is performed to the procedure and produces acceptable results
Paint marking and other detrimental contamination removed
Equipment internals, such as valve internals, removed to prevent damage
Thermocouples fastened properly
Thermocouples adequately monitor the different temperature zones and thickest/thinnest parts
in the fabrication
Temperature monitoring system calibrated
Local heating bandwidth is adequate
Insulation applied to the component where required for local heating
Temperature and hold time are correct.
Heating rate and cooling rate are correct
Distortion is acceptable after completion of the thermal cycle
Hardness indicates an acceptable heat treatment
Test duration is as specified
Visual examination does not reveal defects
Perform a final audit of the inspection dossier to identify inaccuracies and incomplete
information
Inspection reports are complete, accepted and signed by responsible parties
Inspection reports, NDE examiner's interpretations and findings are accurate
