Standard
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AS/NZS ISO 25760:2025
[Current]AS/NZS ISO 25760:2025 identically adopts ISO 25760:2009, which details procedures for the safe removal of valves from cylinders and includes techniques for the identification of inoperable valves. Only the risks due to gas and gas mixtures under pressure are addressed; other technical issues relating to the removal of a valve from a cylinder are not covered.
Published: 07/02/2025
Pages: 20
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Application
4.2 Hazards
4.3 Operator safety and protection
4.4 Operator qualifications
4.4.1 General
4.4.2 Specific process qualifications
4.5 Operator errors
4.6 Special valve designs
4.6.1 Valves (e.g. RPV, VIPR) with residual pressure device
4.6.2 Quick connect valves (clip-on valve)
4.6.3 Other valves
5 Methods for inoperable valves
5.1 Summary of methods
5.2 Choice of method
6 Procedures
6.1 Procedures to identify and segregate cylinders with inoperable valves
6.2 Standard devalving procedure for treating cylinders with operable valves
6.2.1 Devalving procedure
6.2.2 Devalving device
6.3 Procedures for treating cylinders with inoperable valves
6.3.1 Facilities
6.3.2 Equipment
6.3.3 Depressurization
7 Damaged valves and cylinders
Annex A
A.1 Introduction
A.2 Internal corrosion
A.3 Mechanical failure
A.4 Blockages
Annex B
B.1 General
B.2 Methods
B.2.1 Release of gas by the creation of an additional vent in cylinder wall
B.2.2 Cylinder and valve enclosed inside coffin or jacket (that can hold the released pressure)
B.2.3 Release of gas by creation of an additional vent in the cylinder valve
B.2.4 Dismantling of the valve to facilitate movement of a broken spindle
Bibliography
Cited references in this standard