ISO 17640-2018 rus PDF

Full title and description

ISO 17640:2018 — Non‑destructive testing of welds — Ultrasonic testing — Techniques, testing levels and assessment. Russian title (commonly used in translations): "Неразрушающий контроль сварных соединений. Ультразвуковой контроль. Технологии, уровни контроля и оценка". This International Standard specifies recommended manual ultrasonic testing techniques, defined testing levels and procedures for the assessment of indications in fusion‑welded joints in metallic materials.

Abstract

This document specifies techniques for the manual ultrasonic testing of fusion‑welded joints in metallic materials of thickness ≥ 8 mm that exhibit low ultrasonic attenuation (notably low scatter), for object temperatures from 0 °C to 60 °C. It is primarily intended for full‑penetration welded joints where both weld and parent material are ferritic. The standard defines four testing levels (A, B, C and D), provides guidance on selecting levels A–C (Annex A) and sets out two main assessment approaches: (a) evaluation based primarily on defect length and echo amplitude; and (b) evaluation based on characterization and sizing by probe movement techniques.

General information

• Status: Published (confirmed current after systematic review).
• Publication date: 18 October 2018.
• Publisher: International Organization for Standardization (ISO). Russian‑language translations and commercial Russian copies/translations are available from national standards suppliers and translation services.
• ICS / categories: 25.160.40 (Nondestructive testing of welds).
• Edition / version: Edition 4 (2018).
• Number of pages: 30 pages (ISO published PDF/paper edition).

Bibliographic and publication details as recorded in the ISO catalogue and commercial standards distributors.

Scope

ISO 17640:2018 applies to manual ultrasonic testing of fusion welds in metallic materials with thickness ≥ 8 mm and with relatively low ultrasonic attenuation. Its primary application is full‑penetration welds in ferritic steels inspected at ambient object temperatures between 0 °C and 60 °C. The scope includes definition of four testing levels with differing probabilities of detection, and rules for acceptance/assessment of indications using either simple amplitude/length evaluation or more detailed characterization and sizing by probe movement techniques. For special applications (materials other than ferritic steels, partial‑penetration welds, automated testing, object temperatures outside the stated range) testing level D or specific specifications apply.

Key topics and requirements

• Manual ultrasonic testing techniques for weld inspection (pulse‑echo and comparable probe movement methods).
• Four defined testing levels (A, B, C, D), with guidance on selection of A–C and D reserved for special specifications.
• Two primary assessment approaches: (a) evaluation based on length and echo amplitude; (b) detailed characterization and sizing by probe movement.
• Material‑dependent reference ultrasonic velocities used for calibration (steel reference velocities noted in the standard).
• Applicability limits: thickness ≥ 8 mm, object temperature 0 °C to 60 °C, primarily ferritic steels with low attenuation.
• Guidance in annexes (e.g., selection of testing levels) and references to complementary standards for acceptance criteria and characterization methods.

These are the principal technical requirements inspectors and specifiers use to set up inspection procedures and acceptance criteria.

Typical use and users

Typical users include NDT/UT technicians, welding inspectors, quality engineers, fabrication and welding supervisors, plant operators (pressure‑equipment, pipelines, structural steel), inspection bodies and third‑party certifiers. The standard is used to develop inspection procedures, train/qualify personnel, specify acceptance levels in procurement and apply consistent assessment of ultrasonic indications during production and in‑service inspections.

Related standards

ISO 17640 is part of a family of ISO standards on nondestructive testing of welds and is commonly used alongside: ISO 17635 (general rules for NDT of welds), ISO 23279 (characterization of indications in welds), ISO 11666 (acceptance levels — used in conjunction with ISO 17640), ISO 19285 (phased array acceptance criteria) and other sector‑specific NDT documents. National translations and related national standards (e.g., GOST/ГОСТ or ГОСТ ISO variants) cross‑reference ISO 17640 for ultrasonic procedures.

Keywords

ultrasonic testing; weld inspection; nondestructive testing; NDT; testing levels; acceptance criteria; ferritic steel; probe movement; pulse‑echo; weld assessment; ISO 17640; Russian translation.

FAQ

Q: What is this standard?

A: ISO 17640:2018 is an international standard that specifies manual ultrasonic testing techniques, defined testing levels and assessment rules for fusion‑welded joints in metallic materials.

Q: What does it cover?

A: It covers manual ultrasonic inspection methods for welds (primarily full‑penetration ferritic welds ≥ 8 mm thick), four testing levels (A–D), two assessment approaches (length/amplitude and detailed characterization by probe movement), material reference values and guidance on level selection. Special applications require specific provisions (level D or project specification).

Q: Who typically uses it?

A: NDT technicians and inspectors, welding and quality engineers, inspection bodies, fabricators and asset owners who need standardized UT procedures and acceptance/assessment rules for weld integrity.

Q: Is it current or superseded?

A: ISO 17640:2018 is published and was confirmed as the current edition after ISO's 2023 systematic review. At the same time, development work (committee draft) to revise ISO 17640 has been reported (a new CD under development), so users should verify whether a revised edition has been published before relying on the standard for new long‑term specifications. (Current record: published 18 October 2018; confirmed in 2023; committee draft under development thereafter.)

Q: Is it part of a series?

A: Yes — it belongs to the ISO/TC 44 family of standards on nondestructive testing of welds and is intended to be used together with related ISO standards on acceptance levels, characterization and other NDT methods (see Related standards above). National adoptions/translations (for example Russian language versions) exist.

Q: What are the key keywords?

A: Ultrasonic testing, weld inspection, nondestructive testing (NDT), testing levels A–D, acceptance criteria, ferritic steels, probe movement techniques, pulse‑echo, weld assessment.