ISO 11119-3-2020 PDF

Full title and description

Gas cylinders — Design, construction and testing of refillable composite gas cylinders and tubes — Part 3: Fully wrapped fibre reinforced composite gas cylinders and tubes up to 450 l with non-load-sharing metallic or non-metallic liners or without liners. This part specifies minimum requirements for materials, design, manufacture, examination and testing of type 4 (non-load-sharing liner) and type 5 (linerless, limited pressure) fully wrapped composite cylinders and tubes intended for storage and conveyance of compressed or liquefied gases.

Abstract

Specifies requirements for fully wrapped fibre‑reinforced composite cylinders and tubes (carbon, aramid, glass or mixtures) with water capacities up to 450 L, with either non‑load‑sharing metallic or non‑metallic liners or without liners; covers type 4 (liner present, liner not load‑sharing) and type 5 (linerless, test pressure < 60 bar) constructions, manufacturing examinations and tests at time of manufacture, and sets a minimum design life of 15 years. Cylinders manufactured to this part are not intended for toxic, oxidizing or corrosive gases; removable protective sleeves are not addressed.

General information

• Status: Published.
• Publication date: 23 November 2020.
• Publisher: ISO (International Organization for Standardization).
• ICS / categories: 23.020.35 (Gas cylinders).
• Edition / version: Edition 3 (2020); Amendment 1 published 2023.
• Number of pages: 48 pages (main document).

Scope

Applies to fully wrapped fibre‑reinforced composite cylinders and tubes up to 450 L water capacity used for storage and conveyance of compressed or liquefied gases, specifically: type 4 cylinders/tubes with a non‑load‑sharing metallic or non‑metallic liner and type 5 linerless cylinders/tubes (type 5 limited to test pressures below 60 bar). Sets minimum requirements for materials, manufacturing, inspection and testing at time of manufacture and requires a minimum design life of 15 years. Excludes use for toxic, oxidizing or corrosive gases and does not address removable protective sleeves.

Key topics and requirements

• Definitions and classification of fully wrapped composite cylinders (type 4 and type 5) and applicable water capacities (up to 450 L).
• Permitted reinforcement fibres and matrices: carbon fibre, aramid fibre, glass fibre, or combinations within an appropriate resin matrix.
• Material, design and workmanship requirements for liners (when used) and composite overwrap; requirements for bosses/threads and openings aligned on the central axis only.
• Minimum design life: 15 years (with specific notes for lower‑pressure cases where different limits may apply).
• Manufacturing, batch and type approval, examinations and mandatory tests at manufacture (including pressure testing, burst/proof considerations, impact/drop and fire resistance tests as specified for sizes and services).
• Restrictions: not intended for toxic, oxidizing or corrosive gases; removable protective sleeves are outside the scope.
• Detailed technical provisions such as minimum fibre stress ratios, test pressure limits for linerless designs, and acceptance/rejection criteria for manufacturing imperfections.

Typical use and users

Used by composite cylinder manufacturers, design and mechanical engineers, quality and test laboratories, regulatory/approval bodies and procurement/specification teams in industries that store or transport compressed or liquefied non‑toxic gases (e.g., industrial gases, breathing air systems, certain energy applications). Also used by R&D groups developing composite pressure vessels and by inspection bodies responsible for type‑approval and initial manufacturing tests.

Related standards

Belongs to the ISO 11119 series and is closely associated with other cylinder standards and inspection standards, for example ISO 11119‑1 (hoop‑wrapped cylinders, ed. 2020), ISO 11119‑2 (fully wrapped with load‑sharing liners, ed. 2020), ISO 11119‑4 (fully wrapped with load‑sharing welded liners, 2016), ISO 11623 (periodic inspection and testing of composite cylinders, 2023) and complementary metallic cylinder standards such as ISO 9809 (refillable seamless steel cylinders). These documents are typically cross‑referenced for design, manufacturing and inspection/periodic testing regimes.

Keywords

composite gas cylinders; fully wrapped; type 4; type 5; non‑load‑sharing liner; linerless; carbon fibre; aramid; glass fibre; design life 15 years; hydrostatic/burst testing; fire resistance; ISO 11119.

FAQ

Q: What is this standard?

A: ISO 11119‑3:2020 is the International Standard that specifies minimum requirements for design, construction and testing of refillable fully wrapped fibre‑reinforced composite gas cylinders and tubes (type 4 and type 5) up to 450 L water capacity.

Q: What does it cover?

A: It covers materials, design rules, manufacturing processes, examinations and tests at the time of manufacture (including pressure, impact/drop and fire resistance tests where applicable), batch/type approval provisions and acceptance/rejection criteria for fully wrapped composite cylinders with non‑load‑sharing liners or without liners. It excludes toxic/oxidizing/corrosive gases and removable protective sleeves.

Q: Who typically uses it?

A: Cylinder manufacturers, design engineers, test laboratories, quality and compliance personnel, and approval/inspection bodies use this standard when designing, producing or approving fully wrapped composite cylinders and tubes.

Q: Is it current or superseded?

A: ISO 11119‑3:2020 is the current published edition (Edition 3, published November 2020). An amendment (ISO 11119‑3:2020/Amd 1) was published in 2023; the standard remains in force. Users should check for any further revisions or national adoptions before use.

Q: Is it part of a series?

A: Yes — it is part of the ISO 11119 series on composite gas cylinders (other parts include ISO 11119‑1, ISO 11119‑2, ISO 11119‑4, etc.). Periodic inspection and retest guidance for composite cylinders is covered in ISO 11623; metallic cylinder families (ISO 9809 series) provide complementary requirements for steel cylinders.

Q: What are the key keywords?

A: composite gas cylinder, fully wrapped, type 4, type 5, non‑load‑sharing liner, linerless, carbon fibre, aramid, glass fibre, design life 15 years, ISO 11119.