USED FOR:
(Parts 1–2) Non-destructive testing (NDT) of welds — Acceptance levels for radiographic testing
Setting the pass/fail acceptance criteria specifically for radiographically detected indications, correlated with ISO 5817 quality levels.
RELATED STANDARDS:
- ISO 17636-1 “Non-destructive testing of welds – Radiographic testing – Part 1: X- and gamma-ray techniques with film”
- ISO 17636-2 – “Non-destructive testing of welds – Radiographic testing – Part 2: X- and gamma-ray techniques with digital detectors”
- ISO 5817 “Welding – Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) – Quality levels for imperfections”
- ISO 10042 “Welding – Arc-welded joints in aluminium and its alloys -Quality levels for imperfections”
- ISO 6520-1 “Welding and allied processes – Classification of geometric imperfections in metallic materials – Part 1: Fusion welding”
- ISO 17635 “Non-destructive testing of welds – General rules for metallic materials”
DIMENSIONAL RANGE:
This isn’t a dimensional standard in the classic NPS/DN or Class/PN sense, and we don’t try to force it into that box. What ISO 10675 actually sets is a set of acceptance levels, typically labelled 1, 2 and 3 with increasing severity, that scale the permitted size of porosity, inclusions, cracks and other imperfections to the thickness of the welded joint being examined. So instead of a pipe-size range, the real “envelope” here is a thickness-indexed table of indication limits, and which level applies is a project decision driven by service severity rather than something the standard fixes on its own.
DESCRIPTION:
Part 1 covers steel, nickel, titanium and their alloys; Part 2 covers aluminium. It’s the bridge document between “here’s the radiograph” (ISO 17636) and “is this weld acceptable” (ISO 5817).
IMPORTANT NOTES:
Always confirm which edition is cited in the project specification, acceptance limits have been refined across editions, and using an outdated correlation table is a classic source of disputed rejections.
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