BS EN ISO 23278:2015 pdf free

BS EN ISO 23278:2015 pdf free.Non-destructive testing of welds – Magnetic particle testing
BS EN ISO 23278 specifies acceptance levels for indications from imperfections in ferromagnetic steel welds detected by magnetic particle testing. The acceptance levels are primarily intended for use during manufacture examination.
NOTE They can also be used for in-service inspection.
The acceptance levels in this International Standard are based on detection capabilities that can be expected when using techniques specified in ISO 17638 and parameters recommended in Annex A. The acceptance levels can be related to welding standards, application standards, specifications or codes. Such a relationship is shown in ISO 17635 for ISO 5817.
Acceptance levels for grouped indications are not covered by this International Standard.
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO/TS 18173, Non-destructive testing 一General terms and definitions
For the purposes of this document, the terms and definitions given in ISO/TS 18173 and the fllowing apply.
indication having a length greater than three times its width
indication having a length less than or equal to three times its width
Many parameters, either individually or in combination, will affect the ability of a technique to detect imperfections of a given size and orientation with respect to the condition of the test surface.
Detection of small imperfections is highly dependent on the surface condition of the weld and the detection media used. Examples of the application of these parameters to give a high probability of detection are given in Annex A.
The width of the test surface shall include the weld metal and the adjacent parent metal up to a distance of 10 mm on each side.
Acceptance levels prescribed for linear indications are those corresponding to the evaluation level. Indications lower than this shall not be taken into account. Acceptable indications do not have to be recorded.
Any adjacent indications separated by less than the major dimension of the smaller shall be assessed as a single, continuous indication.
Local grinding may be used to improve the classification of all or just part of a test surface, when it is required to work to a higher detection limit than that expected by the existing weld surface condition.BS EN ISO 23278 pdf download.