ISO 11625:2007 PDF

Overview

ISO 11625:2007 - Gas cylinders: Safe handling specifies safety requirements for the handling, use and storage of single gas cylinders (0.5 L to 150 L water capacity) containing compressed, liquefied or dissolved gases. It provides practical, user-focused guidance on content identification, safe operation, and storage practices. The standard does not cover maintenance, repair, inspection/retesting or specialised application requirements (e.g., welding, diving, inerting), which are governed by other standards or owner/supplier procedures.

Key topics and requirements

• Scope and applicability: single cylinders 0.5–150 L water capacity; excludes cylinder owner responsibilities (maintenance, retest, etc.) and specialised applications.
• Content identification: durable labels are the primary identifier (colour coding may be used); unlabeled or contradictory cylinders must be returned to the supplier.
• User responsibilities: only trained personnel should handle cylinders; do not modify markings, valves or valves’ safety devices.
• Safe handling practices: correct moving, connecting/disconnecting, securing and transport; avoid misuse (e.g., using a cylinder as a roller).
• Valve and fittings: correct use of valves, non-return devices, regulators and manifolds; ensure gas-tight connections and manage residual pressure safely.
• Protection and emergency: procedures for leaking or heat-exposed cylinders, evacuation and containment, and required emergency equipment.
• Gas-specific hazards: precautions for oxidizing gases, oxygen enrichment, asphyxiation from inert gases, and corrosive or toxic gases (including disposal/return).
• Environmental limits: temperature limits, venting/ventilation requirements, and special restrictions (e.g., MRI safety for ferromagnetic cylinders).
• Storage: segregation by hazard class, general storage rules and guidance for safe on-site storage.

Practical applications and users

ISO 11625:2007 is practical for:

• Safety managers and EHS teams setting local cylinder handling and storage procedures
• Laboratory, hospital and clinic staff managing medical or specialty gas cylinders
• Manufacturing and workshop supervisors (metalworking, fabrication, process industries)
• Gas suppliers and distributors referencing user guidance to provide safe delivery and instructions
• Facilities that store compressed, liquefied or dissolved gases and need clear user-oriented handling rules

Note: For application-specific systems (welding, diving, manifolding), consult relevant specialized standards in addition to ISO 11625.

Related standards

Relevant ISO references cited in ISO 11625:2007:

• ISO 32 - Medical gas cylinder colour/marking
• ISO 5145 - Cylinder valve outlets
• ISO 7225 - Precautionary labels
• ISO 10286 - Terminology
• ISO 11117 - Valve protection caps/guards
• ISO 13769 - Stamp marking

Keywords: ISO 11625:2007, gas cylinders, safe handling, storage, compressed gases, liquefied gases, cylinder labels, safety data sheet (SDS), valve safety, ventilation, cylinder storage.