ISO 23555-1:2022

Gas pressure safety and control devices for use in gas transmission, distribution and installations for inlet pressures up to and including 10 MPa — Part 1: General requirements

This document specifies generic safety, constructional, performance, testing and documentation requirements for high pressure controls for use in gas transmission, distribution and installations (hereafter referred to as controls).

This document is applicable to controls with operating pressures greater than 500?kPa (5 bar) and up to and including 10?MPa (100?bar) and nominal size up to DN 400 for use with fuel gases as natural gas, manufactured gas, biomethane or liquefied petroleum gas (LPG) in commercial, industrial installations, including fuel gas infrastructures.

The test methods given in this document are intended for product type test, routine tests and batch surveillance tests.

This document is not applicable to:

—??? controls upstream from/on/in domestic gas-consuming appliances which are installed downstream of domestic gas meters;

—??? controls designed with declared maximum capacity?=200?m³/h (normal conditions) and declared maximum inlet pressure?=500?kPa (5?bar), to be incorporated into pressure control systems used in service lines (pipework from the main pipework in a gas infrastructure to the point of delivery of the gas);

—??? industrial process control valves, such as IEC 60534;

—??? controls used in aggressive/sour gas environments (gas environments containing water and H₂S are considered sour) or severely corrosive conditions;

—??? controls in service conditions with renewables (e.g. H₂NG with hydrogen more than 10?%) and/or waste gases (e.g. biogas, etc.), if additional information is not provided (e.g. contaminant, liquid, etc.).

Edition	2022
Standard Part No	1
Published Date	2022
Published By	International Standardization Organisation
Page Count	70