ISO 13338:2022

Name: ISO 13338:2022 — Gas cylinders — Gases and gas mixtures — Determination of corrosiveness for the selection of cylinder valve outlet
SKU: ISO 13338:2022
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Gas cylinders — Gases and gas mixtures — Determination of corrosiveness for the selection of cylinder valve outlet

Название (английский):

ISO 13338:2022

Gas cylinders — Gases and gas mixtures — Determination of corrosiveness for the selection of cylinder valve outlet

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 7
Дата публикации:: 31 мая 2022 г.
Издание:: ISO IS 13338 edition 3 version 1
ICS:: 23.020.35

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Описание (английский):

This document specifies the following, in order to determine the corrosiveness of gases and gas mixtures so that a suitable outlet connection can be assigned to each of them: — for pure gases and some liquids, a complete list indicating their corrosiveness; — for gas mixtures, a calculation method, in the absence of experimental data, relating to the corrosiveness of each of their components.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 13338:2022 - "Gas cylinders - Gases and gas mixtures - Determination of corrosiveness for the selection of cylinder valve outlet" - defines how to determine the corrosiveness of pure gases and gas mixtures so that an appropriate cylinder valve outlet (connection) can be selected. It provides a complete corrosiveness listing for many pure gases and a calculation method for mixtures when experimental data are not available.

Key topics and technical requirements

Classification scheme

Uses tissue corrosiveness categories: C (corrosive - irreversible damage), i (irritant - reversible damage), nc (non-corrosive/non-irritant).
Integrates with the FTSC code subdivisions for chemical reactivity: 0 (non‑corrosive), 1 (non‑halogen acid forming), 2 (basic), 3 (halogen acid forming).

Table of pure gases

Table 1 lists corrosiveness and FTSC subdivisions for many pure gases and some liquids that may be supplied in pressure containers.

Mixture assessment method

Adopts an additivity approach similar to the GHS method for eye/skin damage.
Uses generic concentration thresholds (Table 2) to classify mixtures:
- Sum of C-components ≥ 3% → mixture classified as C
- Sum of C-components ≥ 1% but < 3% → can trigger i
- i-components ≥ 10% → i
- Combined rule: (10 × C) + i ≥ 10% → i
Provides worked examples demonstrating the thresholds and resulting C codes.

Conservative application

Notes that some valve-outlet standards may require treating a mixture as corrosive regardless of concentration of corrosive components.

Practical applications and who uses this standard

ISO 13338:2022 is practical for anyone involved in the safe supply, design, selection and regulation of gas cylinders:

Gas producers and suppliers - to assign correct valve outlets and labelling based on corrosiveness.

Cylinder and valve manufacturers - to select compatible outlet designs and materials.

Safety managers and procurement - to ensure compatibility between gas service and equipment.

Transporters and storage operators - to apply appropriate handling and segregation rules.

Laboratories, medical gas providers, welding and industrial gas users - for risk assessment when specifying cylinder fittings.

Related standards and references

ISO 5145 - Cylinder valve outlets for gases and gas mixtures (selection and dimensions)

ISO 14456 - Gas properties and FTSC classification codes

UN GHS - Additivity method for classification (used as the basis for mixture calculation)

Keywords: ISO 13338:2022, gas cylinders, corrosiveness, cylinder valve outlet, FTSC code, gas mixtures, GHS additivity, valve selection, gas safety.

ISO 13338:2022

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and who uses this standard

Related standards and references

Технические детали

ISO 5145:2017

Gas cylinders — Cylinder valve outlets for gases and gas mixtures — Selection and dimensioning

ISO 14456:2015

Gas cylinders — Gas properties and associated classification (FTSC) codes

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