ISO 11119-1:2020

Overview - ISO 11119-1:2020 (composite gas cylinders)

ISO 11119-1:2020 specifies minimum requirements for the design, construction and initial testing of type 2 hoop-wrapped fibre reinforced composite gas cylinders and tubes (load-sharing metal liner with composite circumferential reinforcement) with water capacities up to 450 l. It covers materials, manufacturing, workmanship, inspection, type-approval and batch testing for cylinders intended for the storage and conveyance of compressed or liquefied gases and defines a minimum design life of 15 years. Removable protective sleeves are excluded.

Key technical topics and requirements

• Cylinder types and scope
  • Type 2 composite, hoop-wrapped reinforcement on the cylindrical portion only
  • Reinforcement fibres: carbon fibre, aramid fibre, glass fibre (or mixtures) in a matrix or steel wire
  • Load-sharing metal liners and related liner materials
• Materials and testing
  • Requirements for liner and composite materials, material property verification and batch testing
  • References to standard test methods for fibres, yarns and matrix properties
• Design and manufacture
  • Design submission requirements, minimum fibre stress ratios and manufacturing controls
  • Production quality, workmanship and traceability
• Type approval and test program
  • Prototype and type-approval tests including: proof pressure, hydraulic volumetric expansion, liner and cylinder burst, ambient and environmental cycling, high-velocity impact (gunfire), fire resistance (with extended criteria for tubes >150 l), salt water immersion, torque (for taper threads), drop, resin shear strength and glass transition temperature
  • Procedures for new designs, design variants and failure criteria
• Batch inspection and marking
  • Batch-level liner and overwrap inspection, test reporting and mandatory cylinder marking requirements

Practical applications - who uses ISO 11119-1

• Manufacturers and designers of composite gas cylinders and tubes (type 2)
• Testing laboratories and certification bodies performing type approval and batch testing
• Gas suppliers, transport and logistics companies specifying cylinder procurement
• Regulatory agencies and conformity assessment organizations for transport of dangerous goods
• Safety and design engineers developing composite pressure receptacles for industrial, medical and specialty gases

Related standards and cross-references

• ISO 11439 - cylinders for natural gas vehicles (NGV)
• ISO 11623 - periodic inspection and re‑testing of composite cylinders
• ISO 10286 - gas cylinder vocabulary
• ISO 9809 / ISO 7866 - metallic and aluminium cylinder standards
• ISO 11114-1 - compatibility of cylinder/valve materials with gases

ISO 11119-1:2020 is essential for stakeholders needing authoritative, internationally harmonized requirements for design, manufacture, testing and certification of hoop-wrapped composite gas cylinders up to 450 l.