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PAS 4441:2024 Components used in hydrogen gas metering. Specification, 2024
- Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and abbreviations
- 3.1 Terms and definitions
- 3.2 Abbreviations
- 4 Hydrogen gas
- 4.1 Gas characteristics
- 4.2 Gas category
- 4.3 Supply pressures
- 5 Components
- 5.1 Emergency control valve (ECV)
- 5.2 Gas filter
- 5.3 Non-return valve
- 5.4 Insulation joint
- 5.5 Excess flow valve (EFV)
- 5.6 Thermal cut-off device
- 5.7 Pliable connector
- 5.8 Pressure regulator
- 5.9 Meter bracket
- 5.10 Meter fittings
- 5.11 Meter box
- 5.12 Anti-tamper device
- 5.13 Automatic shut-off systems
- 6 Meter
- 6.1 General
- 6.2 Flows not exceeding a nominal 20 m3/h (domestic)
- 6.3 Flows more than 20 m3/h
- 7 Electronic gas volume conversion systems
- 8 Markings and instructions
- 8.1 Supplementary markings
- 8.2 Technical instructions
- Bibliography [Go to Page]
