Overview
EN ISO 25760:2015 (identical to ISO 25760:2009) defines safe, operational procedures for the removal of valves from gas cylinders. The standard addresses hazards arising from gas and gas mixtures under pressure, describes methods to identify and treat inoperable valves, and gives procedural guidance for depressurization and devalving. It is explicit that mechanical and non-gas-related technical issues are outside its scope, and specialist methods for removing valves from low‑pressure cylinders while under pressure (e.g., some LPG techniques) are not included.
Key topics and requirements
- Scope and application: Intended for gas suppliers, testing facilities, cylinder maintenance operators and any person authorized to remove cylinder valves.
- Hazard awareness: Focuses on risks from pressurized gases-fire/oxidation, asphyxiation, toxicity, cold burns, projection of fragments and stored energy from residual pressure.
- Operator qualifications and training: Operators must be trained in pressure checks, devalving procedures and handling inoperable valves; practice-based and process-specific qualifications are required.
- Risk assessment and controls: Requires a documented risk assessment and application of engineering and procedural controls (e.g., shields, bunkers), plus appropriate PPE and emergency preparedness.
- Identification and segregation: Procedures to identify, mark and segregate cylinders with inoperable valves to prevent accidental reuse or unsafe handling.
- Methods for inoperable valves: Summarizes methods and criteria to select an appropriate technique for depressurization or valve removal; Annex B provides example depressurization methods.
- Standard devalving and damaged equipment: Outlines standard devalving steps for operable valves and guidance for handling damaged valves and cylinders.
- Informative annexes: Annex A lists common reasons valves become inoperable; Annex B gives example methods for safe depressurization.
Practical applications
- Use EN ISO 25760:2015 to develop or update company procedures for:
- Cylinder maintenance and valve replacement
- Test-house devalving workflows
- Safe handling and segregation of suspect cylinders
- Training programs for technicians and emergency responders
- Helps gas suppliers and industrial gas users reduce incidents related to valve removal and manage residual-pressure hazards.
Who should use this standard
- Gas suppliers and distributors
- Cylinder testing/inspection facilities
- Maintenance technicians and workshop managers
- Safety managers and compliance officers in industries using compressed or liquefied gases
Related standards and references
Keywords: EN ISO 25760:2015, ISO 25760:2009, gas cylinders, valve removal, inoperable valves, devalving, cylinder maintenance, safety procedures, depressurization.