ISO 17871:2020

Overview

ISO 17871:2020 - Gas cylinders - Quick-release cylinder valves - Specification and type testing - defines design, type testing, marking and manufacturing test requirements for quick-release cylinder valves fitted to refillable transportable gas cylinders, pressure drums and tubes. The standard applies to valves for non-toxic, non-oxidizing, non-flammable and non‑corrosive compressed or liquefied gases and to extinguishing agents charged with compressed gases used in fire‑extinguishing, explosion‑protection and rescue applications. It excludes cryogenic valves, LPG valves and main closures of portable fire extinguishers.

Key topics and technical requirements

• Scope and classification: Valve types are classified by intended service life - type A (one‑time operation) and types B–E (multiple operations). Type B–E operating-cycle limits are defined (B ≤ 10, C ≤ 100, D ≤ 500, E ≤ 2 000).
• Design & materials: Emphasis on suitable materials, mechanical strength and safe venting arrangements.
• Type testing:
  • Valve test pressure (p_vt): For extinguishing agents, p_vt must be at least the developed pressure of the filled cylinder at 65 °C (calculated from filling conditions).
  • Valve burst test pressure: Specified as 1.5 × p_vt.
  • Endurance testing: Valve operating mechanisms are subject to defined cycle testing (see standard for cycle counts and test methods).
  • Leakage: Total external leakage limit (if tested) is specified - not to exceed 12 cm³/h.
  • Impact and mechanical tests: Resistance to mechanical impact and securing arrangements after impact are addressed.
• Manufacturing tests & marking: Requirements for production inspections, examinations and mandatory markings.
• Documentation & instructions: Manufacturers must supply operating instructions detailing valve type, permitted operations, compatible gases/agents, valve test/filling conditions, activation conditions (pressures, forces, angle, electrical parameters where applicable) and securing arrangements.

Applications

ISO 17871 is primarily targeted at the fire‑fighting industry (rapid discharge of extinguishing agents) but is also directly relevant to:

• Avalanche airbags, life‑raft inflation and similar emergency inflation systems
• Explosion‑protection and rescue equipment using pressurized propellant cylinders
• Transportable refillable propellant gas cylinders that are shipped separately (e.g., for filling)

Who should use this standard

• Cylinder and valve manufacturers
• Third‑party type testing laboratories and conformity assessors
• Fire‑protection equipment designers and integrators
• Procurement/specification engineers, safety officers and regulators involved in transportable gas systems

Related standards

• ISO 10297 - Cylinder valves - Specification and type testing
• ISO 14246 - Cylinder valves - Manufacturing tests and examinations
• ISO 22435 - Valves with integrated pressure regulators - Specification and type testing
• ISO 10286 - Gas cylinder terminology

Keywords: ISO 17871, quick‑release cylinder valves, gas cylinders, type testing, valve burst test pressure, valve test pressure, endurance test, leakage, fire‑fighting valves.