ISO 9809-2-2019 PDF

Full title and description

St ISO 9809-2-2019 — Gas cylinders — Design, construction and testing of refillable seamless steel gas cylinders and tubes — Part 2: Quenched and tempered steel cylinders and tubes with tensile strength greater than or equal to 1 100 MPa. This part specifies minimum requirements for materials, design, manufacture, examination and testing at the time of manufacture for refillable seamless steel gas cylinders and tubes (water capacity up to and including 450 L) intended for compressed, liquefied and dissolved gases.

Abstract

This International Standard (third edition, 2019) sets minimum requirements for quenched and tempered seamless steel cylinders and tubes whose actual tensile strength Rma is ≥ 1 100 MPa, for water capacities up to and including 450 L. It applies to cylinders for compressed, liquefied and dissolved gases and defines material controls, design and manufacture rules, non‑destructive examination, production and batch testing, marking and acceptance criteria; it also specifies limits beyond which additional requirements apply (for example higher Rma maxima for specific diameter and wall‑thickness combinations).

General information

• Status: Published (International Standard; confirmed on review).
• Publication date: August 2019 (catalog listings commonly show 21 August 2019).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 23.020.35 (Gas cylinders).
• Edition / version: Edition 3 (ISO 9809-2:2019).
• Number of pages: 57.

Scope

Specifies minimum requirements for material, design, construction, workmanship, manufacturing processes, examination and testing at the time of manufacture for refillable seamless quenched and tempered steel gas cylinders and tubes with water capacities up to and including 450 L and with actual tensile strength Rma ≥ 1 100 MPa. The part is applicable to cylinders and tubes used for compressed, liquefied and dissolved gases. It excludes cylinders/tubes beyond specific strength/diameter/wall‑thickness limits where additional requirements may apply (e.g., Rma,max limits given for particular diameter and guaranteed wall thickness combinations). Assessment of conformity should take account of applicable national regulations of the countries of use.

Key topics and requirements

• Material specification and controls for quenched and tempered steels suitable for gas cylinders (chemical composition, tensile properties and heat treatment requirements).
• Design rules for shell and end‑closures, dimensional tolerances, allowed water capacities (≤ 450 L) and strength limits related to Rma values.
• Manufacturing and workmanship requirements (forming, heat treatment, surface condition, dimensional checks).
• Non‑destructive examinations (e.g., ultrasonic inspection) and acceptance criteria at production.
• Production tests: hydrostatic (proof) testing, batch tests (including burst and pressure‑cycling where required), and volumetric expansion/acceptance limits.
• Marking, traceability and documentation requirements for cylinder identification and certification.
• Limits and exclusions: specified Rma maxima for certain diameter / guaranteed wall thickness combinations and notes on when additional requirements apply.
• Requirements for calibration of test instruments and manufacturer quality/control procedures to ensure conformity at time of manufacture.

Typical use and users

Used by cylinder designers and manufacturers, quality and production engineers, conformity assessment bodies, inspection authorities, gas suppliers and purchasers who require internationally harmonized design and test criteria for high‑strength quenched and tempered seamless steel gas cylinders and tubes (e.g., industrial gas producers, cylinder banks, specialty gas suppliers, and transportable storage applications up to the stated capacity limits).

Related standards

ISO 9809 is a multi‑part series; related parts and standards commonly referenced with ISO 9809‑2 include ISO 9809‑1 (quenched and tempered steels with Rma < 1 100 MPa), ISO 9809‑3 (normalized steel cylinders/tubes), other ISO 9809 parts (e.g., stainless steel considerations in later parts), ISO 11119 series (composite cylinder design and testing), ISO 11120 (large seamless steel tubes), ISO 13769 (stamp marking of gas cylinders), and periodic inspection/re‑test standards such as ISO 11623. These related documents cover different materials, construction types, marking and periodic inspection rules that interface with ISO 9809‑2 in manufacture, testing and in‑service regimes.

Keywords

gas cylinders; refillable; seamless steel; quenched and tempered; Rma; tensile strength ≥ 1100 MPa; water capacity 450 L; hydrostatic test; burst test; non‑destructive examination; manufacturing; inspection; ISO/TC 58/SC 3.

FAQ

Q: What is this standard?

A: ISO 9809‑2:2019 is the third‑edition International Standard that defines design, construction and testing requirements for refillable seamless quenched and tempered steel gas cylinders and tubes having actual tensile strength Rma ≥ 1 100 MPa and water capacities up to and including 450 L.

Q: What does it cover?

A: It covers material requirements, design and dimensional rules, manufacturing and heat‑treatment practices, required non‑destructive examinations, production and batch testing (including hydrostatic proof and burst-related provisions), marking and traceability — and it specifies limits/exclusions where additional requirements apply for very high tensile strengths and larger dimensions.

Q: Who typically uses it?

A: Cylinder manufacturers, designers, production and quality engineers, test laboratories, conformity assessment bodies, gas suppliers and purchasing/specification engineers who need harmonized international requirements for high‑strength seamless steel cylinders.

Q: Is it current or superseded?

A: ISO 9809‑2:2019 is the current published edition (third edition, 2019). The ISO catalogue shows the 2019 edition as published and the series is subject to periodic five‑year reviews; listings indicate the document was reviewed/confirmed in subsequent catalogue checks. Users should verify the current status with their national standards body or ISO catalogue before relying on the standard for regulatory or compliance decisions.

Q: Is it part of a series?

A: Yes — ISO 9809 is a multi‑part series covering refillable seamless steel gas cylinders and tubes (Parts 1, 2 and 3 for different steel treatments/strength ranges, with additional parts addressing other materials); it is intended to be used together with related ISO documents for marking, periodic inspection and composite cylinder rules where applicable.

Q: What are the key keywords?

A: Refillable seamless steel gas cylinders; quenched and tempered; tensile strength (Rma) ≥ 1 100 MPa; hydrostatic/proof test; burst test; non‑destructive examination; manufacturing; marking; 450 L water capacity.