ISO 15995:2021

Overview

ISO 15995:2021 - "Gas cylinders - Specifications and testing of LPG cylinder valves - Manually operated" defines requirements for the design, specification, type testing, production testing and inspection of dedicated, manually operated LPG cylinder valves used directly on transportable refillable LPG cylinders. The standard covers valves and associated equipment for both vapour and liquid service, and sets expectations for documentation and markings. It excludes bursting discs and fusible plugs, valves for fixed automotive installations, and ball valves.

Key topics and requirements

• Design and materials
  • Requirements for valve bodies, stems, outlets and operating mechanisms.
  • Rules for metallic (including copper alloys) and non‑metallic materials and their operating temperature suitability.
• Essential and optional components
  • Covered: excess flow valves, pressure relief devices (optional), eduction tubes, non‑return valves, liquid level indicators, sealing caps and sediment tubes.
• Leak tightness and torque
  • Criteria for external/internal leak tightness and specified opening / closing / operating torque limits to ensure safe and ergonomic operation.
• Type testing
  • Mandatory type tests such as hydraulic pressure, leak tests, stem tests, fire exposure of hand wheels, impact, excessive torque, endurance, vibration, and specific tests for excess flow and non‑return valves.
• Production testing and inspection
  • Annex B provides production testing and inspection requirements to ensure ongoing conformity during manufacturing.
• Documentation & markings
  • Requirements for test reports, technical documentation and on‑valve markings to support traceability and regulatory compliance.
• Special conditions
  • Annexes address special valves, low temperature requirements and vibration testing procedures.

Applications and who uses this standard

ISO 15995:2021 is intended for:

• Valve manufacturers designing and certifying manually operated LPG cylinder valves
• Cylinder and equipment manufacturers integrating valves for refillable transportable LPG cylinders
• Test laboratories and certification bodies performing type and production testing
• Regulators, safety inspectors and procurement teams specifying compliant equipment for LPG supply, refilling and distribution
• Operators and distributors who require valves suitable for liquid and vapour service and robust field use

Keywords: ISO 15995:2021, LPG cylinder valves, manually operated, gas cylinders, specifications and testing, type testing, production testing, excess flow valve, leak tightness, valve markings.

Related standards

• ISO 14245 - self‑closing LPG cylinder valves
• ISO 10297, ISO 17871, ISO 17879 - valves for compressed, dissolved and other liquefied gases