ISO 11120 Pressure Tubes for International Gas Transport
For international transportation of compressed gases, ISO 11120 pressure tubes are the globally recognized solution for high-capacity, seamless steel pressure containment. The ISO 11120 standard governs the design and manufacture of transportable pressure tubes used in tube trailers and modular transport systems worldwide.
CP Industries designs and manufactures seamless steel pressure tubes that fully comply with ISO 11120, supporting global industrial gas and alternative fuel distribution. With approvals that include European TPED marking and dual certification options, CP Industries delivers ISO 11120 pressure tubes engineered for safe, efficient, and compliant gas transportation across international markets.
Overview of ISO 11120
The ISO 11120 standard, published by the International Organization for Standardization, specifies requirements for the design, manufacture, testing, and inspection of seamless steel gas pressure tubes used in transport applications.
What the ISO 11120 standard governs
- Seamless steel pressure tubes designed specifically for transportation.
- Material requirements, design stress limits, and safety factors.
- Manufacturing controls, inspection, and hydrostatic testing protocols.
Typical vessel sizes and capacities
ISO 11120 pressure tubes are designed for large-capacity transport, with volumes of up to 3,000 liters, making them ideal for high-payload tube trailers and modular transport systems.
Relationship to international transport requirements
Because ISO 11120 is recognized globally, it serves as the foundation for compliance across international shipping lanes and regional regulatory frameworks, particularly within Europe when paired with TPED approval.
Applications for ISO 11120 Pressure Tubes
Industrial gas transportation
ISO 11120 pressure tubes are widely used to transport oxygen, nitrogen, argon, helium, hydrogen, and other compressed industrial gases. Their large volume and high-pressure capability support efficient long-distance distribution and virtual pipeline operations.
Alternative fuel transport (CNG & hydrogen)
As demand grows for cleaner energy, ISO 11120 tubes are key in transporting alternative fuels such as compressed natural gas (CNG) and hydrogen. Their robust, seamless construction supports high cycling demands and challenging service conditions.
Tube trailer systems
ISO 11120 pressure tubes are the core pressure-containing components in international tube trailer assemblies. CP Industries engineers these tubes for optimal payload efficiency, structural durability, and compatibility with modular transport frames.
TPED and European Compliance
TPED marking and notified body approvals
For transportation within the European Union, ISO 11120 pressure tubes must comply with the Transportable Pressure Equipment Directive (TPED). CP Industries works with a notified inspection body in the United Kingdom to obtain TPED approvals. Tubes bearing the TPED marking are approved for transport throughout all EU member states.
When PED and TPED apply to ISO 11120 vessels
- TPED applies to transportable pressure equipment, including ISO 11120 tubes used in gas transport.
- PED typically applies to stationary pressure equipment and is not generally used for transport tubes.
CP Industries also offers dual-certified pressure tubes that merge ISO 11120 requirements with U.S. DOT regulations, allowing a single tube design to meet compliance requirements on both sides of the Atlantic.
ISO 11120 vs. Other Pressure Tube Standards
While ISO 11120 is the primary international standard for transportable pressure tubes, it is important to understand how it compares to other regulations.
- ISO 11120 vs. DOT: DOT specifications govern pressure vessels used for transportation within the United States, while ISO 11120 is internationally recognized and commonly required outside the U.S.
- ISO 11120 vs. ASME: ASME standards typically apply to stationary, ground-mounted pressure vessels rather than transport tubes.
- ISO 1282: In some regions or legacy systems, ISO 1282 may appear as a related or predecessor standard for gas cylinders. While ISO 11120 is the current standard for large seamless transport tubes, CP Industries’ engineering team can assist in navigating compatibility and regulatory transitions involving ISO 1282 where applicable.
Why Choose CP Industries for ISO 11120 Vessels?
Manufacturing precision
CP Industries brings more than a century of experience in seamless steel pressure vessel manufacturing. Our tightly controlled forging, heat treatment, and testing processes ensure consistent quality across every ISO 11120 pressure tube we produce.
Global compliance experience
From ISO 11120 and TPED to DOT and dual-certified solutions, CP Industries understands the complexities of international regulatory environments. We help customers navigate compliance requirements while maintaining operational efficiency.
Support for international customers
Our engineering and technical teams work directly with customers worldwide to design ISO 11120 pressure tubes tailored to gas type, pressure, transport configuration, and regional regulations.
FAQs
What is ISO 11120 used for?
ISO 11120 is used for the design and manufacture of seamless steel pressure tubes intended for the transportation of compressed gases in tube trailers and modular transport systems.
Are ISO 11120 vessels approved for hydrogen?
Yes. ISO 11120 pressure tubes are commonly used for hydrogen transport when properly designed for pressure, material compatibility, and service conditions.
ISO 11120 vs. DOT tubes — what’s the difference?
DOT tubes are regulated by the U.S. Department of Transportation and apply primarily within the United States. ISO 11120 tubes are internationally recognized and widely required for cross-border and European transport applications.
Contact CP Industries
Whether you need TPED-approved transport tubes, dual-certified solutions, or guidance on international compliance, CP Industries delivers ISO 11120 pressure tubes engineered for global gas transportation.
Contact us to speak with our team about selecting the right ISO 11120 vessel for your application.
