ISO 17638-2016 PDF

Full title and description

ISO 17638:2016 — Non‑destructive testing of welds — Magnetic particle testing. This international standard specifies techniques for detection of surface imperfections in welds in ferromagnetic materials (including heat‑affected zones) using magnetic particle testing; it is intended for use with most welding processes and joint configurations and describes variations of the basic techniques (Annex A) to alter test sensitivity.

Abstract

ISO 17638:2016 specifies procedures and techniques for magnetic particle testing of welds in ferromagnetic materials to detect surface‑breaking and near‑surface imperfections. The document describes magnetization methods, particle application and inspection practices, and gives informative guidance (Annex A) on technique variations that affect sensitivity. The standard does not set acceptance levels for indications (see ISO 23278 for acceptance guidance).

General information

• Status: Published (confirmed).
• Publication date: 10 October 2016 (Edition 2, 2016).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.160.40 (Welded joints and welds).
• Edition / version: Edition 2 (2016).
• Number of pages: 15.

Scope

Specifies magnetic particle testing techniques for detection of surface imperfections in welds and in the heat‑affected zone of ferromagnetic materials. Techniques described are applicable to most welding processes and joint configurations; the standard gives variations to achieve higher or lower sensitivity but does not define acceptance criteria for indications (product, application standards or ISO 23278 provide acceptance levels).

Key topics and requirements

• Principles and methods of magnetization for weld inspection (longitudinal, circular, and complex field techniques).
• Application and observation of magnetic particles (dry and wet methods), lighting and surface preparation to ensure reliable detection of indications.
• Guidance on test sensitivity and technique variations (informative Annex A) to increase/decrease detection capability.
• Statement that the standard does not specify acceptance levels for indications — references ISO 23278 for acceptance guidance.
• Intended for use on ferromagnetic materials and applicable to most common welding processes and joint types.

Typical use and users

Used by NDT technicians and inspectors performing magnetic particle testing on welded fabrications, welding engineers establishing inspection procedures, quality and inspection departments in fabrication and maintenance organizations, third‑party inspection bodies, and standards/codes committees that reference magnetic particle testing techniques. It is commonly used alongside acceptance standards and personnel qualification standards.

Related standards

Commonly referenced standards and documents used with ISO 17638 include ISO 23278 (acceptance levels for magnetic particle indications), ISO 17637 (visual testing of fusion‑welded joints), ISO 17635 (general rules for NDT of welds), ISO 5817 (quality levels for weld imperfections), ISO 9712 (qualification and certification of NDT personnel) and parts of the ISO 3452 series for penetrant testing when complementary surface inspection is required.

Keywords

magnetic particle testing, weld inspection, NDT, ferromagnetic materials, welds, heat affected zone, test sensitivity, acceptance levels, ISO 17638.

FAQ

Q: What is this standard?

A: ISO 17638:2016 is an ISO international standard that defines the techniques and procedures for magnetic particle testing of welds in ferromagnetic materials to detect surface and near‑surface imperfections.

Q: What does it cover?

A: It covers magnetization methods, particle application (wet and dry), inspection conditions, and informative guidance on variations that affect test sensitivity; it does not set acceptance criteria for indications.

Q: Who typically uses it?

A: NDT practitioners (magnetic particle technicians/inspectors), welding and quality engineers, fabricators, maintenance inspection teams, and third‑party inspection/certification bodies.

Q: Is it current or superseded?

A: The 2016 edition (Edition 2) is the current published edition (published 10 October 2016). The previous edition (ISO 17638:2003) was withdrawn and replaced by ISO 17638:2016; the 2016 version has been confirmed in later reviews.

Q: Is it part of a series?

A: Yes — it forms part of ISO standards on non‑destructive testing of welds (the ISO 17xxx family of NDT/weld standards) and is commonly used together with related documents such as ISO 17637 (visual testing), ISO 17635 (general rules), ISO 23278 (acceptance levels for magnetic particle testing) and personnel certification standards like ISO 9712.

Q: What are the key keywords?

A: Magnetic particle testing; weld inspection; nondestructive testing; ferromagnetic; heat affected zone; test sensitivity; acceptance levels; ISO 17638.