AS/NZS ISO 17420.3:2021
Respiratory Protective Devices – Performance requirements, Part 3: Thread Connection
AS/NZS ISO 17420.3:2021 identically adopts ISO 17420-3:2012 for Australia and New Zealand, which applies to an unassisted filtering device and specifies a standard thread connection between a filter and the respiratory interface as required in AS/NZS 17420.2. This document also includes the description of test simulators that are necessary for the assessment of some of the requirements. KEYWORDS: Respiratory protective devices; Filtering device; Thread connection
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AS/NZS ISO 17420.3:2021 Respiratory protective devices - Performance requirements Thread connection
Preface
Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
4 Requirements
4.1 Elements of thread connection
4.2 Sealing element
4.3 Geometry of thread profile
4.3.1 Circularity of threads
4.3.2 Male thread connector
4.3.3 Female thread connector
4.3.4 Sealing element
4.3.5 Absence of geometric interference
4.4 Physical and mechanical requirements of the thread connection
4.4.1 Resistance of the connectors to pull forces
4.4.2 Physical and mechanical requirements of the sealing element
5 Testing
5.1 Visual inspection
5.2 Circularity of threads
5.2.1 Circularity of male threads
5.2.2 Circularity of female threads
5.3 Geometry of male thread connector
5.4 Geometry of female thread connector
5.5 Beginning of the effective thread of the male connection
5.6 Resistance of the connectors to pull forces
6 Marking and identification
Bibliography
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AS/NZS ISO 17420.3:2021 Respiratory protective devices - Performance requirements Thread connection
Preface
Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
4 Requirements
4.1 Elements of thread connection
4.2 Sealing element
4.3 Geometry of thread profile
4.3.1 Circularity of threads
4.3.2 Male thread connector
4.3.3 Female thread connector
4.3.4 Sealing element
4.3.5 Absence of geometric interference
4.4 Physical and mechanical requirements of the thread connection
4.4.1 Resistance of the connectors to pull forces
4.4.2 Physical and mechanical requirements of the sealing element
5 Testing
5.1 Visual inspection
5.2 Circularity of threads
5.2.1 Circularity of male threads
5.2.2 Circularity of female threads
5.3 Geometry of male thread connector
5.4 Geometry of female thread connector
5.5 Beginning of the effective thread of the male connection
5.6 Resistance of the connectors to pull forces
6 Marking and identification
Bibliography
AS/NZS ISO 17420.3:2021
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.