ISO 3452-1-2021 pdf download.Non-destructive testing – Penetrant testing- Part 1: General principles (ISO 3452-1:2021).
4 Safety precautions
As penetrant inspection techniques often require the use of harmful, flammable and/or volatile materiak, safety regulations (e.g. optical radiation legislation) shall be taken into account.
Prolonged or repeated contact of these materials with the skin or any mucous membrane should be avoided. Working areas shall be adequately ventilated and sited away from sources of heat, sparks or naked flames, taking Into account all applicable safety regulations.
The penetrant testing products and equipment shall be used with care and always in compliance with the instructions supplied by the manufacturer.
tJV-A sources shall always be maintained in a good condition.
Care shall be taken to ensure the safe Implementation of the method.
5 General principles
5.1 Personnel
Testing shall be carried out by proficient, suitably trained and qualified personnel and.where applicable, shall be supervised by competent personnel nominated by the employer or, by delegation of the employer to the inspection company in charge of testing. To demonstrate appropriate qualification, it is recommended that personnel he certified according to ISO 9712 or an equivalent formalized system. Penetrant testing operations, unless otherwise agreed, shall he authorized by a competent supervisory individual (Level 3 or equivalent) approved by the employer.
5.2 Description of the method
Prior to penetrant testing, the surface to be inspected shall be clean and dry. Suitable penetrant is then applied to the test area and enter dlscontlnulties open to the surface. After the appropriate penetration time has elapsed, the excess penetrant Is removed from the surface and the developer applied. The developer absorbs the penetrant that has entered and remains In the dlsconnnultles and may give a clearly visible enhanced indication of the discontinuity.
Should complementary non-destructive testing (NDT) be required, it is preferable that the penetrant inspection be performed first, so as not to introduce contaminants into open discontinuities. 11 penetrant inspection is used following another NDT technique or method, the surface shall be cleaned carefully to remove contaminants before application.
5.3 Process sequence
The penetrant process shall be continuous with no undue delays between the stages. If process parameters are not met, surfaces shall be cleaned and reprocessed.
Testing generally proceeds through the following stages:
a) preparation and precleaning (see 8.2):
b) application of perietrant (see BA);
c) excess penetrant removal (see BS);
d) application of developer (see 8.6):
e) inspection (see aZ);ISO 3452-1 pdf download.