Overview
ISO 10462:2013 - "Gas cylinders - Acetylene cylinders - Periodic inspection and maintenance" specifies requirements for the periodic inspection and maintenance of acetylene cylinders used for the transport of dangerous goods. It applies to acetylene cylinders with or without solvent and with a maximum nominal water capacity of 150 L. The standard is intended for competent inspection bodies and maintenance personnel and is to be used in conjunction with applicable national and international transport regulations (e.g., Packing Instruction P200).
Key Topics
- Scope and applicability: Acetylene cylinders (with/without solvent), up to 150 L; requirements are aligned with transport of dangerous goods.
- Inspection intervals: Periodic inspection intervals follow relevant transport/regulatory requirements. Recommended first inspection after filling: 2 years for non‑monolithic porous material, 3 years for monolithic porous material (after which regular intervals apply as regulated).
- Preparation and safety: Procedures for depressurization, external preparation, valve removal (references ISO 13341), and handling before inspection.
- Visual and internal inspection focus: External visual inspection of the cylinder and detailed assessment of the internal porous material (monolithic or non‑monolithic) for cracking, cavities, crumbling or voids that could allow acetylene decomposition. Notably, ISO 10462 does not require hydraulic/pneumatic pressure testing or internal visual inspection of the shell because of the porous fill.
- Porous material work: Guidance on inspection, addition, replacement of porous material, and determination of top clearance for monolithic fills (see normative annex).
- Valves and safety devices: Inspection of valves and fusible plugs (reference to ISO 22434 for valve maintenance).
- Marking, records and rejection: Requirements for cylinder identification, marking of inspection results and dates, record keeping, rendering cylinders unserviceable and disposal procedures.
- Annexes: Normative and informative annexes provide detailed procedures for external inspection, top‑clearance measurement, porous material cracking and date‑ring indicators.
Applications
- Gas cylinder inspection providers and accredited periodic inspection bodies
- Gas producers and distributors handling acetylene cylinders for industrial welding, chemical applications and transport
- Safety and compliance officers ensuring adherence to dangerous goods transport rules
- Maintenance workshops replacing porous materials, valves or performing reassembly and marking
Related Standards
- ISO 13341 - Fitting of valves to gas cylinders
- ISO 22434 - Inspection and maintenance of cylinder valves
- ISO 13088 - (referenced for tare/ bundle information)
- National and international transport regulations (Packing Instruction P200)
ISO 10462:2013 is a practical, safety‑focused standard emphasizing porous material integrity, correct inspection procedures, and compliance with transport regulations - essential for anyone responsible for the safe maintenance and transport of acetylene cylinders.
