Overview
EN ISO 7225:2007 (ISO 7225:2005) specifies the design, content and application of precautionary labels for gas cylinders. It covers labels intended for individual cylinders containing single gases or gas mixtures and aligns label requirements with the United Nations Recommendations on the Transport of Dangerous Goods. Labels for cylinder bundles or bundle labels are explicitly excluded.
Keywords: EN ISO 7225:2007, ISO 7225, gas cylinders, precautionary labels, hazard labels, transport of dangerous goods
Key Topics and Requirements
- Label design and composition
- Precautionary labels consist of a diamond-shaped hazard label (primary and, where needed, subsidiary labels) plus a panel for identification and supplementary information.
- When multiple hazard diamonds are used, subsidiary labels are placed to the right of the primary label; overlapping is permitted but the primary hazard must remain fully visible.
- Size and placement
- Minimum label sizes are specified according to cylinder outside diameter (three size classes) to ensure legibility on small through large cylinders.
- Preferred location is on the rounded part of the cylinder or immediately below (maximum 50 mm); small cylinders (10 L and below) may use the cylinder body or neck ring when dimensions permit.
- Colour and symbols
- Label colours, symbols, numerals and text must comply with the UN Model Regulations (transport regulations) so hazard class and division are instantly recognizable.
- Panel content
- The panel shall include transport-identification information such as the proper shipping name and UN number, plus any supplementary hazard instructions, name and address of the filler, and filling mass where applicable.
- Materials and durability
- Labels and adhesives must be durable under foreseeable transport, storage and use conditions and compatible with cylinder surfaces.
- Filler and maintenance responsibilities
- The filler is responsible for correct attachment, replacement and legibility of labels. Old labels must be removed unless the new label information is identical.
Practical Applications / Who Uses This Standard
- Cylinder manufacturers and label suppliers - for producing compliant labels.
- Gas filling and distribution companies - to ensure correct marking before dispatch.
- Logistics and transport operators - to meet transport safety and regulatory requirements.
- Workplace safety officers, emergency responders and inspectors - to quickly identify gas hazards and take appropriate precautions.
- Regulatory bodies and auditors - for conformity assessments and enforcement.
Related Standards
- ISO 13769 - Gas cylinders - Stamp marking
- ISO 32 - Gas cylinders for medical use - Marking for identification of content
- UN Recommendations on the Transport of Dangerous Goods - Model Regulations
EN ISO 7225:2007 helps ensure consistent, durable and legible hazard communication on individual gas cylinders, improving safety in filling, transport, storage and emergency response.