ISO 17420-3:2012 Respiratory protective devices - Performance requirements. Part 3: Thread connection

First edition. ISO 17420-3 was prepared by Technical Committee ISO/TC 94, Personal safety — Protective clothing and equipment, Subcommittee SC 15, Respiratory protective devices. — 24 p.
This part of ISO 17420 is applicable to an unassisted filtering device and specifies a standard thread connection between a filter and the respiratory interface as required in ISO 17420-2.
This part of ISO 17420 also includes the description of test simulators that are necessary for the assessment of some of the requirements.