ISO 14245:2021 Gas cylinders — Specifications and testing of LPG cylinder valves — Self-closing

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Gas cylinders — Specifications and testing of LPG cylinder valves — Self-closing

1 Scope

This document specifies the requirements for design, specification, type testing and production testing and inspection for dedicated LPG self-closing cylinder valves for use with and directly connected to transportable refillable LPG cylinders.

It also includes requirements for associated equipment for vapour and liquid service. Bursting discs and/or fusible plugs are not covered in this document.

Annex A identifies requirements for production testing and inspection.

This document excludes other LPG cylinder devices which are not an integral part of the dedicated self-

closing cylinder valve.

This document does not apply to cylinder valves for fixed automotive installations and ball valves.

NOTE For manually operated LPG cylinder valves see ISO 15995. For cylinder valves for compressed, dissolved and other liquefied gases see ISO 10297, ISO 17871 or ISO 17879.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection

ISO 10286, Gas cylinders — Terminology

ISO 11114-1, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 1: Metallic materials

ISO 11114-2, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 2: Non-metallic materials

ISO 13341, Gas cylinders — Fitting of valves to gas cylinders

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 10286 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://w ww. iso. org/ obp

— IEC Electropedia: available at http:// www.e lectropedia .org/

3.1

liquefied petroleum gas

LPG

low pressure liquefied gas composed of one or more light hydrocarbons which are assigned to UN 1011, UN 1075, UN 1965, UN 1969 or UN 1978 only and which consists mainly of propane, propene, butane, butane isomers, butene with traces of other hydrocarbon gases

[SOURCE: ISO 10286:2015, 723, modified]

3.2

cylinder valve

primary shutoff device fitted to LPG cylinders, intended for liquid or vapour filling and withdrawal

Note 1 to entry: The valve includes the valve body (3.8), valve stem (3.14), valve outlet (3.15) and valve operating mechanism (3.22).

Note 2 to entry: The valve can also include additional devices, e.g. eduction tube (3.5) liquid level indicator (3.7), fixed liquid level gauge (3.6), excess flow valve (3.9), non-return valve (3.10), sediment tube (3.19) and pressure relief valve (3.27).

3.3

external leak tightness

leak tightness to atmosphere (leakage in and/or leakage out), when the valve is open

3.4

internal leak tightness

leak tightness across the valve seat (leakage in and/or leakage out), when the valve is closed

3.5

eduction tube

tube fitted to the valve to allow withdrawal of liquid LPG with the cylinder in its normal operating position

3.6

fixed liquid level gauge

device such as a dip tube in combination with a vent valve to verify that the predetermined maximum liquid level in a cylinder has been reached or surpassed

3.7

liquid level indicator

device such as a float gauge, permitting the gauging of the liquid level in the cylinder

3.8

valve body

major valve component including valve stem (3.14) and valve outlet (3.15) and, where applicable, the provision for other optional components

3.9

excess flow valve

valve comprising two or more components designed to close or partially close when the flow of liquid or vapour passing through it exceeds a predetermined value and to re-open when the pressure differential across the valve has been restored below a certain value

3.10

non-return valve

automatic valve which allows gas/liquid to flow only in one direction

[SOURCE: ISO 10286:2015, 349, modified — liquid added]

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