【国外标准】 Standard Specification for Filters Used in Air or Nitrogen Systems

This specification covers the design, construction, test, and performance requirements for air or nitrogen system filters, referred to hereinafter as filters. These filters are intended to be installed in-line to protect equipment from particular contamination. Filter element type: type 1 - disposable, and type 2 - cleanable. Filter element bypass composition - composition A - with bypass, and composition B - without bypass. Filter element differential indicator style: style I - with differential pressure indicator, and style II - without differential pressure indicator. Visual examination, hydrostatic shell test, external leakage test, and bubble point test shall be performed to meet the requirements prescribed.1.1 This specification covers the design, construction, test, and performance requirements for air or nitrogen system filters, referred to hereinafter as filters. These filters are intended to be installed in-line to protect equipment from particular contamination.1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.