API
API 1104
Does API 1104 govern your girth weld? Scope decision flow for the pipeline welding standard, the workmanship-or-ECA choice, and the codes it sits next to.
Reference library
Welding standards: which one governs your job
Each card answers one question — does this standard apply to the joint in front of you — with a scope decision flow, the codes it is read alongside, and the records that evidence conformity. None of them reproduces a standard's acceptance values: those tables are copyrighted and belong in the copy you hold. For the subject in depth, every card links to the long-form guide behind it.
API
API
API 650
Does API 650 govern the tank in front of you, or API 620 or API 653 instead? Scope decision flow for the welded-tank standard and the codes it invokes.
ASME
ASME
ASME B31.3
Does ASME B31.3 govern your piping, and which fluid service category sets the examination extent? Scope decision flow, the codes it invokes, and the records that evidence WPS compliance.
ASME
ASME BPVC Section IX
ASME BPVC Section IX qualifies welding, brazing and fusing procedures and personnel. Scope decision flow, the construction codes that invoke it, and the production records that show a weld stayed inside its qualified variables.
ASME
ASME BPVC Section VIII, Division 1
Does ASME Section VIII, Division 1 govern the vessel, or does Division 2 apply instead? Scope decision flow for the by-rule pressure-vessel code and the codes it invokes for welding and NDE.
AWS
AWS
AWS D1.1
Does AWS D1.1 govern your structural steelwork, and does the connection count as statically or cyclically loaded? Scope decision flow and the records that evidence a qualified weld.
AWS
AWS D1.2
Does AWS D1.2 govern your welded aluminium structure, and does the base alloy match the code's qualification groups? Scope decision flow and the records that evidence a qualified weld.
AWS
AWS D1.6
Does AWS D1.6 govern your welded stainless structure, and does the alloy grade match the code's qualification and sensitization considerations? Scope decision flow and the records that evidence a qualified weld.
CEN
CEN
EN 1011-2
EN 1011-2 recommends how to avoid hydrogen (cold) cracking in ferritic steel arc welding. Scope decision flow, the codes it sits next to, and the records that show preheat was actually reached.
CEN
EN 1090-2
Does EN 1090-2 apply to your structure, and which execution class sets the welding, NDT and coordinator requirements? Scope decision flow and the records that evidence it.
CEN
EN 15085-3
EN 15085-3 sets the design requirements for welded railway vehicles and components. Scope decision flow, how it links to manufacturer certification, and the records an EN 15085 auditor reviews.
ISO
ISO
ISO 10042
Does ISO 10042 grade the aluminium weld in front of you, or does it belong to ISO 5817 instead? Scope decision flow for arc-welded aluminium joints, the ISO 6520-1 imperfection numbers it shares with the steel route, and where beam-welded aluminium falls outside it.
ISO
ISO 13916
Does ISO 13916 govern how you take a preheat reading? Scope decision flow for the preheat, interpass and preheat-maintenance temperature measurement standard, and the record a reading depends on.
ISO
ISO 13920
Does ISO 13920 set the dimensional tolerance you are checking against? Scope decision flow for the general-tolerances standard for welded constructions, and the process controls that limit distortion.
ISO
ISO 14175
Does ISO 14175 classify the shielding or backing gas your WPS names? Scope decision flow for the gas classification standard, and where it stops short of setting flow rate.
ISO
ISO 14731
Does your organisation need a named welding coordinator? Scope decision flow for ISO 14731, the personnel standards it sits beside, and the records an appointment has to produce.
ISO
ISO 14732
Does ISO 14732 cover your mechanized or automatic welding cell? Scope decision flow for the operator and weld-setter qualification standard, its boundary with manual welder qualification, and the records a range check depends on.
ISO
ISO 15607
Does ISO 15607 govern how your welding procedure gets qualified? Scope decision flow for the general-rules standard, the five routes it indexes, and the pWPS-to-WPQR trail that follows from picking one.
ISO
ISO 15609-1
Does ISO 15609-1 apply to your procedure document? Scope decision flow for the arc-welding WPS content standard, the qualification routes that support it, and the records that show production followed it.
ISO
ISO 15614-1
Does ISO 15614-1 qualify your procedure? Scope decision flow for the arc-welding procedure test, the codes it sits inside, and the records that evidence the qualified range.
ISO
ISO 15614-2
Does ISO 15614-2 qualify your aluminium welding procedure? Scope decision flow for the aluminium and aluminium-alloy procedure test, the codes it sits inside, and the records that evidence the qualified range.
ISO
ISO 17635
Does ISO 17635 tell you which NDT method to use, or just how to frame the decision? Scope decision flow for the general-rules standard for non-destructive testing of welds, and the method standards it sits above.
ISO
ISO 17636-2
Does ISO 17636-2 apply to your radiography setup? Scope decision flow for the digital-detector radiographic testing standard, the film-based counterpart, and the records that support an NDT report.
ISO
ISO 17637
Does ISO 17637 cover your inspection stage? Scope decision flow for the visual-testing procedure standard, the acceptance standard it pairs with, and the records that support a visual-testing report.
ISO
ISO 17638
Does ISO 17638 apply to your weld? Scope decision flow for the magnetic particle testing standard, the materials it excludes, and the records that support an MT inspection report.
ISO
ISO 17639
Does ISO 17639 govern the cross-section in front of you? Scope decision flow for the macro/micro examination standard, the qualification tests that call for it, and what it does not decide.
ISO
ISO 17640
Does ISO 17640 govern the ultrasonic examination in front of you? Scope decision flow for the manual UT standard, the codes it is read with, and the records that support the result.
ISO
ISO 17641-1
Does ISO 17641-1 govern your susceptibility test? Scope decision flow for the general part of the hot cracking test series, the codes it sits next to, and what a pass does not prove.
ISO
ISO 17642-1
Does ISO 17642-1 govern the susceptibility test you are planning? Scope decision flow for the general part of the cold (hydrogen) cracking test series, the codes it sits next to, and what it does not calculate.
ISO
ISO 2553
Does ISO 2553 govern the weld symbol on this drawing? Scope decision flow for the symbolic-representation standard, System A vs System B, and the codes it is read with.
ISO
ISO 3834-1
Which part of the ISO 3834 series applies? Selection-criteria decision flow for the fusion-welding quality-requirements standard, the parts it points to, and the records that back the level you declare.
ISO
ISO 3834-2
ISO 3834-2 sets comprehensive quality requirements for fusion welding. Decision flow for choosing between parts 2, 3 and 4, the codes that invoke it, and the records that satisfy its equipment and traceability clauses.
ISO
ISO 3834-3
Is the standard-level part of ISO 3834 the right fit? Decision flow against the comprehensive and elementary tiers, the codes it sits beside, and the records a Part 3 declaration depends on.
ISO
ISO 3834-5
Claiming Part 2, 3 or 4 of ISO 3834? Decision flow for the personnel, procedure and management documents it names alongside the claim, and the records that satisfy them.
ISO
ISO 4063
Does ISO 4063 supply the process number on your WPS? Scope decision flow for the welding-process nomenclature standard, and how a reference number differs from a qualification.
ISO
ISO 5817
Does ISO 5817 govern your joint? Scope decision flow for the steel, nickel and titanium quality-level standard, the codes it is read with, and the records that evidence conformity.
ISO
ISO 6520-1
Does ISO 6520-1 name the imperfection you are looking at? Scope decision flow for the fusion-welding classification standard, the six groups it defines, and the standards read alongside it.
ISO
ISO 6947
Does ISO 6947 supply the position code on your WPS or welder certificate? Scope decision flow for the welding-position naming standard, and how it differs from a qualification range.
ISO
ISO 9606-1
Does ISO 9606-1 cover your welder for this job? Scope decision flow for the steel welder-qualification standard, the codes it sits beside, and the records a range-of-approval check depends on.
ISO
ISO 9606-2
Does ISO 9606-2 cover your aluminium welder, or does the steel part apply instead? Scope decision flow for the aluminium welder-qualification standard and the range-of-approval records a check depends on.
ISO
ISO 9692-1
Does ISO 9692-1 set your groove type? Scope decision flow for the arc-welding joint-preparation standard for steels, the processes it covers, and the codes it feeds into.
ISO
ISO 9712
Does ISO 9712 certify the person performing your examination? Scope decision flow for the NDT personnel standard, the roles it does not cover, and the records that survive an audit.
ISO
ISO/TR 15608
Does ISO/TR 15608 set your procedure qualification's material group? Scope decision flow for the metallic-materials grouping system, and why group adjacency alone does not decide interchangeability.
Conformity is easier to argue with measurements behind it
Therness records what the machine delivered on every weld, so the evidence a standard asks for exists before anyone goes looking for it.
