ISO DIS 23555-1
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
|Publication Date:||1 November 2019|
|ICS Code (Gas fuel burners):||27.060.20|
ISO 23555-1 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).
ISO 23555-2 is applicable to regulators with operating pressures greater than 500 kPa and up to and including 10 MPa (100 bar) and nominal diameters up to DN 400 for use with fuel gases as natural gas, manufactured gas or liquefied petroleum gas (LPG) in commercial, industrial installations, including fuel gas infrastructures.
The test methods given in ISO 23555-1 are intended for product type test, routine tests and batch surveillance tests.
ISO 23555-1 is not applicable to:
-controls upstream from/on/in domestic gas-consuming appliances which are installed downstream of domestic gas meters;
-controls designed 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) with declared maximum capacity ≤ 200 m3/h (n) and declared maximum inlet pressure ≤ 500 kPa (5 bar);
-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.).