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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.
This standard specifies test methods for the overall leakage detection of reverse osmosis or nanofiltration devices，the leakage detection of membrane modules and the leakage points detection in membrane modules.
This standard is applicable to the leakage detection of reverse osmosis or nanofiltration devices with spiral wound membrane elements in municipal and industrial water treatment systems for desalination.Other types of devices installed with reverse osmosis and nanofiltration membrane elements may refer to this document.
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