![]() ![]() The cleaned area shall be large enough to prevent interference from areas adjacent to the actual test surface. Precleaning shall ensure that the test surface is free from residues and that it allows the penetrant to enter any discontinuity. When generating test procedures, the product manufacturer’s recommendations shall be taken into account.Ĭontaminants such as scale, rust, oil, grease, paint and water shall be removed - if necessary using mechanical or chemical methods, or a combination of these. The written test procedure shall also include all relevant parameters for testing, e.g. ![]() ISO 21 pdf free download.Non-destructive testing - Penetrant testing - Part 1: General principles.ħ.3.4 In situations where contamination can occur, it is essential to ensure that the penetrant testing products do not have a deleterious effect on fuels, lubricants, hydraulic fluids, etc.ħ.3.5 For parts associated with peroxide rocket fuel, explosive stores (these include all items containing explosive propellant, initiating or pyrotechnic materials), oxygen equipment or nuclear applications, the compatibility of penetrant testing products shall be given special consideration.Īll testing shall be performed in accordance with an approved written documentation, either specifically prepared or included in the relevant product standard. ![]()
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