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ISO 11118:2025

Gas cylinders - Non-refillable metallic gas cylinders - Specification and test methods
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This document specifies requirements for the material, design, inspections, construction and workmanship, manufacturing processes, and tests at manufacture of non-refillable metallic gas cylinders of welded, brazed, or seamless construction. This document also specifies the requirements for the non-refillable sealing devices and their methods of testing. It is applicable to non-refillable metallic gas cylinders for compressed and liquefied gases.

NOTE: The specific gases permitted in cylinders constructed to this document can be limited by national or international requirements.

This document is applicable to cylinders where:

  • a) the test pressure does not exceed 250 bar1) (i.e. ph ≤ 250 bar) for liquefied gases and 450 bar for compressed gases; or
  • b) the product of the test pressure and the water capacity does not exceed 1 000 bar·litres (i.e. ph V ≤ 1 000 bar l); or
  • c) the test pressure exceeds 45 bar and the water capacity does not exceed 5 l (i.e. for ph > 45 bar, then V ≤ 5 l).

1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2

SDO ISO: International Organization for Standardization
Document Number ISO 11118
Publication Date Jan. 1, 2025
Language en - English
Page Count 42
Revision Level
Supercedes
Committee ISO/TC 58/SC 3
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