This document specifies some gas compatibility test methods to evaluate plastic materials suitable for use in the manufacture of composite gas cylinder liners. It is also applicable to the evaluation of the suitability of plastic matrix materials used for Type 5 cylinders. Some fluids like water, used for cylinders testing, can react positively or negatively when in contact with plastic liners. This compatibility issue is not covered by this document.
Tämän julkaisun valmistelusta Suomessa vastaa Kemesta ry, puh. 040 820 4888.
Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 Tests to be performed on specimens
5.1 Permeation test
5.2 Swelling/blistering test
5.3 Ageing test
6 Tests to be performed on cylinders
6.1 Liner collapse due to internal pressure in the cylinder being below atmospheric pressure
6.2 Permeability test
6.3 Liner collapse and blistering test
7 Rejection and rendering cylinders used for testing unserviceable
ISO 10286:2021 Gas cylinders — Vocabulary
ISO 178:2019 Plastics — Determination of flexural properties
ISO 179-2:2020 Plastics — Determination of Charpy impact properties — Part 2: Instrumented impact test
ISO 10286:2021 Gas cylinders — Vocabulary
ISO 178:2019 Plastics — Determination of flexural properties
ISO 179-2:2020 Plastics — Determination of Charpy impact properties — Part 2: Instrumented impact test
ISO 3167:2014 Plastics — Multipurpose test specimens
ISO 5256:1985 Steel pipes and fittings for buried or submerged pipe lines — External and internal coating by bitumen or coal tar derived materials
ISO 527-1:2019 Plastics — Determination of tensile properties — Part 1: General principles
ISO 527-2:2012 Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and extrusion plastics
ISO 527-3:2018 Plastics — Determination of tensile properties — Part 3: Test conditions for films and sheets
ISO 527-4:2021 Plastics — Determination of tensile properties — Part 4: Test conditions for isotropic and orthotropic fibre-reinforced plastic composites
ISO 527-5:2021 Plastics — Determination of tensile properties — Part 5: Test conditions for unidirectional fibre-reinforced plastic composites