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ISO 5175-3:2025

Gas welding equipment — Safety devices — Part 3: Decomposition blockers for low-pressure acetylene

Publication date:   Apr 25, 2025

General information

60.60   Standard published   Apr 25, 2025

ISO

ISO/TC 44/SC 8 Equipment for gas welding, cutting and allied processes

International Standard

25.160.30   Welding equipment

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Scope

This document specifies the general requirements and tests for decomposition blockers downstream of pressure regulators in acetylene manifold systems (see ISO 14114). Decomposition blockers can be used in the low-pressure section (downstream of acetylene manifold system outlet) up to 0,15 MPa (1,5 bar) e.g. in pipelines, outlet points or for the protection of low-pressure sections in big pipe systems. Decomposition blockers can only be used in sections with pure acetylene. The possible backflow of oxygen or air into the section where the decomposition blocker is installed needs to be prevented by a non-return valve downstream of the decomposition blocker.

Life cycle

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PUBLISHED
ISO 5175-3:2025
60.60 Standard published
Apr 25, 2025