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ISO/CD 15626

Non-destructive testing of welds — Time-of-flight diffraction technique (TOFD) — Acceptance levels

General information

Current stage: 30.60 Effective date: Apr 12, 2026

Originator: ISO

Owner: ISO/TC 44/SC 5

Type: International Standard

Scope

This document specifies acceptance levels for the time‑of‑flight diffraction technique (TOFD) of full penetration welds in ferritic steels from 6 mm up to 300 mm thickness which correspond to the quality levels of ISO 5817.
These acceptance levels are applicable to indications classified in accordance with ISO 10863.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 15626:2018

NOW

IN_DEVELOPMENT
ISO/CD 15626
30.60 Close of voting/ comment period
Apr 12, 2026