British Standards Institution

Source:: ISO
Committee:: WEE/46/2 - Surface Methods - Penetrant, Magnetic Particles
Categories:: Metal testing. Non-destructive
Comment period start date:: 04/08/2025
Comment period end date:: 27/09/2025
Number of comments:: 0

Comment by:

27th Sep

Scope

This document describes the magnetic flux leakage (MFL) testing method and evaluation of results for in-use equipment made of ferromagnetic materials. It is mainly used for the detection of volume defects such as corrosion and mechanical damage on the inner and outer surfaces of plate and tubular structures. A certain thickness of coating is allowed on the detection surface.

This document applies to external MFL testing of in-use ferromagnetic seamless steel pipes and base metal of pressure vessel shells with an outer diameter of not less than 38 mm and a wall thickness of not more than 20 mm. It is also applicable to MFL testing of base metal of pressure vessels and storage tank bottom plates from the inside.

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

26/05/2025

3. Public Comments

Public Comments start date:

04/08/2025

Public Comments end date:

27/09/2025

Learn more about the standards development process

Standards Development

BS ISO 22500 ISO 22500 Non-destructive testing. Magnetic flux leakage testing. Corrosion of steel plates and steel pipes of in-service equipment

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