本标准规定了磁粉检测用环形试块（或试块）的分类、技术要求和检验方法。本标准适用于环形试块的型式检验和出厂检验。本标准也可作为用户订货的验收依据。

This standard specifies the classification, technical requirements and test methods of ring (or blocks) for magnetic particle testing. This standard is applicable to Type inspection and Ex-factory inspection of ring blocks.This standard may also be used as the acceptance criteria for in client orders.

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