This standard specifies the classification, technical requirements and test methods of blocks for penetrant testing (or penetrant testing blocks).
This standard is applicable to type testing and Exfactory inspection of penetrant testing blocks.This standard may also be used as the acceptance criteria for in client orders.
NOTE The penetrant testing blocks applicable to this standard do not include Type 1 and Type 2 blocks in GB/T 18851.3.
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This document specifies a test method for determining the mean pore size of separation membranes by gas permeation method.
This document is applicable to the mean pore size test for flat membranes and hollow fiber membranes with a diameter within 0.01μm-0.20μm in dry state, and for other shapes of separation membranes this document may be referred to.
This document is applicable to the mean pore size test with nitrogen as the test gas, and the test with other noncondensable gases, such as He, H2, O2, Ar etc., may refer to this document.
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