EN ISO 15626:2018 PDF

Name: EN ISO 15626:2018 — Non-destructive testing of welds - Time-of-flight diffraction technique (TOFD) - Acceptance levels (ISO 15626:2018)
SKU: EN ISO 15626:2018
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Non-destructive testing of welds - Time-of-flight diffraction technique (TOFD) - Acceptance levels (ISO 15626:2018)

Название (английский):

EN ISO 15626:2018

Non-destructive testing of welds - Time-of-flight diffraction technique (TOFD) - Acceptance levels (ISO 15626:2018)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 18
Дата публикации:: 22 августа 2018 г.
Издание:: CEN EN 15626 edition 2 version 1
ICS:: 25.160.40

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Описание (английский):

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.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 15626:2018 - “Non‑destructive testing of welds - Time‑of‑flight diffraction technique (TOFD) - Acceptance levels” - specifies acceptance criteria for TOFD inspection of full‑penetration welds in ferritic steels with nominal thicknesses from 6 mm to 300 mm. The acceptance levels are aligned with the weld quality levels of ISO 5817 and apply to indications classified in accordance with ISO 10863. This EN version is the CEN adoption of ISO 15626:2018.

Key topics and technical requirements

Scope and applicability

TOFD acceptance levels for full‑penetration welds in ferritic steels, t = 6–300 mm.
Acceptance criteria mapped to ISO 5817 quality levels.

Relation to other standards

Acceptance levels are defined relative to ISO 5817 (quality levels B, C, D) and use examination/indication classification from ISO 10863; vocabulary reference ISO 5577 is cited.

Size definitions

Length (l) and height (h) of indications are defined by coordinate differences (x- and z-coordinates).

Length determination

Techniques for elongated straight and elongated curved indications: fitting hyperbolic (arc‑shaped) cursors and defined cursor-placement procedures to measure indication length.

Height determination

Height must be measured from A‑scans with consistent cursor placement; recommended methods include:
- Method 1: transit time between leading edges
- Method 2: transit time between first peaks
- Method 3: transit time between maximum amplitudes
- Method 4: transit time between first zero crossings

Acceptance levels

Three acceptance levels are specified and mapped to ISO 5817 quality levels:
- Acceptance level 1 - corresponds to ISO 5817 level B (stringent)
- Acceptance level 2 - corresponds to ISO 5817 level C (intermediate)
- Acceptance level 3 - corresponds to ISO 5817 level D (moderate)

Additional topics

Rules for total length, grouping of indications and treatment of point‑like indications.

Applications and users

EN ISO 15626:2018 is intended for professionals performing or specifying TOFD weld inspections and for organizations that need harmonized acceptance criteria for weld quality. Typical users include:

NDT engineers and technicians (TOFD specialists)

Welding inspectors and QA/QC personnel in fabrication, pressure vessel, pipeline and structural steel industries

Engineering firms, inspection bodies and construction contractors specifying weld acceptance criteria

Related standards

ISO 15626:2018 (original international standard)

ISO 5817 (weld quality levels)

ISO 10863 (examination/indication classification for TOFD)

ISO 5577 (NDT ultrasonic vocabulary)

Keywords: EN ISO 15626:2018, TOFD, time‑of‑flight diffraction, NDT of welds, acceptance levels, ISO 5817, ISO 10863, weld inspection, ferritic steels.

EN ISO 15626:2018 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 15626:2018

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

SIST EN ISO 5817:2023

Welding - Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) - Quality…

BS EN ISO 10863:2020

Non-destructive testing of welds. Ultrasonic testing. Use of time-of-flight diffraction technique (TOFD).

SIST EN ISO 5577:2026

Non-destructive testing - Ultrasonic testing - Vocabulary (ISO 5577:2025)