T/CRAAS 431.4-2017 Active Group standards

T/CRAAS 431.4-2017 High-efficiency air filter and filter materials - Part 4: Filter leak detection - Scanning method

Publish Date: 2017-06-01 Implement Date: 2017-09-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CRAAS 431.4-2017

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Terminology (principles and coordination and cooperation)

Publish Date: 2017-06-01

Implement Date: 2017-09-01

Scope

Main technical content: This part of T/CRAA 431 specifies the test procedure of the "scanning method", which is a standard test method for determining the leakage of filters. This part is applicable to filters of ISO 35 H to ISO 75 U grades. This part also introduces other normative methods, including the smoke trace observation method (see Appendix A) applicable to ISO 35 H to ISO 45 H grades, the turbidity meter method (see Appendix B), and the leakage test for solid PSL aerosols (see Appendix E). This part is used in conjunction with T/CRAA 431.1, T/CRAA 431.2, T/CRAA 431.3, and T/CRAA 431.5.