Abstract

This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 8, Equipment for gas welding, cutting and allied processes. 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.

Begin

2025-07-01

Planned document number

DIN ISO 5175-3

Project number

09201315

Responsible national committee

NA 092-00-07 AA - Equipment for gas welding, cutting and allied processes  

Responsible international committee

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