ISO 10156-2017 PDF

Full title and description

ISO 10156:2017 — Gas cylinders — Gases and gas mixtures — Determination of fire potential and oxidizing ability for the selection of cylinder valve outlets. This International Standard specifies methods to determine whether a gas or gas mixture is flammable in air and whether it is more or less oxidizing than air under atmospheric conditions; it is intended to support classification of gases and selection of appropriate cylinder valve outlets.

Abstract

ISO 10156:2017 defines procedures and criteria for assessing fire potential (flammability in air) and oxidizing ability of gases and gas mixtures at ambient (atmospheric) conditions. The results are used for classification and for selecting cylinder valve outlet types; the standard explicitly does not cover safe preparation of the mixtures under pressure or at non‑ambient temperatures.

General information

• Status: Published (International Standard, confirmed).
• Publication date: July 2017 (registered/published 21 July 2017 in the ISO record).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 23.020.35 (Gas cylinders); 71.100.20 (Gases for industrial application).
• Edition / version: Edition 4 (2017).
• Number of pages: 27 (ISO published edition — national adoptions may show different pagination in adopted/full-text translations).

Scope

ISO 10156:2017 provides standardised methods for determining (a) whether a gas or gas mixture is flammable in air at atmospheric conditions, and (b) whether it is more or less oxidizing than air. The classification produced by these methods is intended to inform the selection of cylinder valve outlets and related fittings. The standard does not address procedures for preparing these gas mixtures under pressure or at temperatures other than ambient.

Key topics and requirements

• Definitions and criteria for flammability of gases and gas mixtures in air at atmospheric conditions.
• Methods for assessing oxidizing ability relative to air.
• Classification rules to support selection of cylinder valve outlet types and safe handling design decisions.
• Tables/formulae or procedures (as provided in the standard) that allow classification of common gases and mixtures.
• Notes and exclusions clarifying that mixture preparation under pressure and non‑ambient temperature behaviour are outside the standard's remit.

Typical use and users

Primary users include industrial gas producers and suppliers, gas cylinder and valve manufacturers, gas handling and distribution engineers, safety and compliance officers, testing laboratories, and regulators involved in transport and storage of compressed gases. The standard is used to classify gases and to select compatible cylinder valve outlets and fittings in manufacturing, supply chains and safety documentation.

Related standards

ISO 10156:2017 replaces earlier editions (ISO 10156:2010, ISO 10156:1996) and relates to other cylinder and gas‑handling standards and regional adoptions (for example BS EN ISO 10156:2017 and various national adoptions). Part 2 and other associated documents have existed historically (e.g. ISO 10156‑2:2005 for oxidizing ability of certain gases) and national/EN versions may carry additional editorial content or pagination differences. An amendment (ISO 10156:2017/DAmd 1) has been circulated as a draft in ISO committees and may update specific content when published.

Keywords

flammability, oxidizing ability, gas classification, gas mixtures, cylinder valve outlets, gas cylinders, gas safety, ISO 10156, valve selection, compressed gases

FAQ

Q: What is this standard?

A: ISO 10156:2017 is an International Standard that specifies methods to determine flammability in air and oxidizing ability of gases and gas mixtures to support classification and selection of cylinder valve outlets.

Q: What does it cover?

A: It covers test/assessment methods and classification rules for flammability and oxidizing ability at atmospheric conditions; it does not cover safe preparation of gas mixtures under pressure or behaviour at non‑ambient temperatures.

Q: Who typically uses it?

A: Industrial gas suppliers, cylinder and valve manufacturers, safety engineers, testing laboratories and regulators use the standard for classification and selection of cylinder valve outlets and related safety decisions.

Q: Is it current or superseded?

A: The 2017 edition (Edition 4) is the current published version from ISO (published July 2017) and replaced the 2010 edition. ISO committee activity indicates an amendment has been drafted (ISO 10156:2017/DAmd 1) which may modify the 2017 text when finalized — users should check for the published amendment before relying on unchanged clauses for new designs or regulatory compliance.

Q: Is it part of a series?

A: ISO 10156 has had earlier editions and related parts historically (e.g., ISO 10156‑2:2005 addressing specific oxidizing‑ability determinations); many countries also publish national or regional (EN) adoptions of ISO 10156:2017 for local use.

Q: What are the key keywords?

A: Flammability, oxidizing ability, gas classification, gas mixtures, cylinder valve outlets, compressed gas safety.