ISO 10893-4-2011 Non-destructive testing of steel tubes - Part 4: Liquid penetrant inspection of seamless and welded steel tubes for the detection of surface imperfections

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This part of ISO 10893 specifies requirements applicable to liquid penetrant testing of seamless and welded tubes for the detection of surface imperfections.
It is applicable to all or any part of the tube surface as required by the relevant product standards.
It can also be applicable to the testing of hollow sections.