ISO 23826:2021 Gas cylinders - Ball valves - Specification and testing

standard by International Organization for Standardization, 10/01/2021

Full Description

This document specifies design, type testing, marking, manufacturing tests and examinations requirements for ball valves used as:

closures of refillable transportable gas cylinders, pressure drums and tubes;main valves for cylinder bundles;valves for cargo transport units [e.g. trailers, battery vehicles, multi-element gas containers (MEGCs)];

which convey compressed gases, liquefied gases and dissolved gases.



NOTE1 In this document, the term valve is used with the meaning of ball valve.



This document does not apply to ball valves for:

oxidizing gases as defined in ISO10156;toxic gases (i.e. gases listed in ISO10298 having an LC₅₀ value 5000ppmacetylene for single gas cylinders, pressure drums and tubes.

NOTE2 The reason for the exclusion of oxidizing gases is that the use of ball valves as closures of high-pressure cylinders for oxidizing gases is known to lead to specific ignition hazardsthat cannot reasonably be mitigated through the ball valve design or type testing. Safety hazards concern both the ball valve itself and any downstream equipment.



NOTE3 The reason for the exclusion of acetylene for single gas cylinders, pressure drums and tubes is that the risk of an acetylene decomposition cannot reasonably be mitigated through the ball valve design or type testing.



This document does not apply to ball valves for liquefied petroleum gas (LPG), cryogenic equipment, portable fire extinguishers and cylinders for breathing apparatus.



NOTE4 Requirements for valves for cryogenic vessels are specified in ISO21011.



NOTE5 Certain specific requirements for quick-release valves for fixed fire-fighting systems in addition to those that are given in this document are specified in ISO16003.

Product Details

Published: 10/01/2021 File Size: 1 file , 1.5 MB Same As: BS EN ISO 23826:2021