ISO 11119-2:2020/Amd 1:2023

Overview

ISO 11119-2:2020/Amd 1:2023 details the requirements for the design, construction, and testing of refillable composite gas cylinders and tubes. This amendment focuses on fully wrapped, fibre-reinforced composite gas cylinders and tubes with capacities up to 450 litres, specifically those utilizing load-sharing metal liners. As an amendment to the third edition of ISO 11119-2:2020, it introduces important testing clarifications and updates that aim to enhance both product integrity and safety standards within the gas containment industry.

This international standard is developed by ISO/TC 58, Gas cylinders, Subcommittee SC 3, which is responsible for cylinder design.

Key Topics

• Composite Gas Cylinders: The standard covers gas cylinders and tubes made from fibre-reinforced composites, which provide high strength-to-weight ratios and increased corrosion resistance.
• Load-Sharing Metal Liners: These liners work together with the composite wrap to share internal stress loads, optimizing performance and longevity.
• Testing Requirements: The amendment revises specific cyclic testing procedures to confirm the robust performance of cylinders under repetitive pressurization.
• Cyclic Pressure Testing: Updated testing mandates cylinders withstand 3,000 cycles at two-thirds the test pressure without bursting or leaking, followed by an additional 9,000 cycles or until leakage occurs-should failure by burst occur in this second stage, the cylinder does not meet the standard.
• Quality and Safety Assurance: These enhancements are designed to maintain high global safety benchmarks for gas storage and transport.

Applications

ISO 11119-2:2020/Amd 1:2023 is instrumental in a variety of sectors where safe and reliable high-pressure gas storage is essential:

• Industrial Gas Supply: Used in refilling and transporting gases such as oxygen, nitrogen, and argon in manufacturing and processing environments.
• Medical Gases: Ensures reliability in the containment of critical medical gases, such as oxygen cylinders for hospitals and ambulatory care.
• Firefighting Equipment: Applied in self-contained breathing apparatus (SCBA) cylinders, which require stringent performance under intense conditions.
• Automotive Industry: Supports vehicles powered by compressed natural gas (CNG) or hydrogen, where light weight and safety are paramount.
• Aerospace and Defense: Provides guidelines for lightweight, high-strength cylinders used in fuel systems, emergency air, and specialized equipment.

By providing clear testing criteria, the standard assures stakeholders about the consistent quality and long-term safety of high-pressure gas cylinders used in dangerous or mission-critical operations.

Related Standards

Organizations referencing ISO 11119-2:2020/Amd 1:2023 may also consult the following related international standards for broader compliance and integration:

• ISO 11119-1: Composite gas cylinders and tubes with non-metallic and non-load-sharing liners
• ISO 11119-3: Fully wrapped fibre reinforced composite cylinders with non-metallic and load-sharing metallic liners, for larger capacities
• ISO 9809 Series: Covers seamless steel gas cylinders
• ISO 7866: Specifies requirements for seamless aluminium alloy gas cylinders
• ISO/TC 58 Standards: Further standards relating to transportable gas cylinders, accessories, and testing methods

Conclusion

ISO 11119-2:2020/Amd 1:2023 is essential for manufacturers, suppliers, and regulators involved in the production and management of composite gas cylinders and tubes. Its updated requirements support internationally recognized safety practices, promote sustainable design, and enable widespread application across industries that depend on reliable gas cylinder technology. For the most effective and compliant gas storage solutions, adherence to this ISO standard and its related documents is strongly recommended.