ISO 23550:2004

ISO 23550:2004 specifies safety, constructional and performance requirements and testing of safety control or regulating devices and sub-assemblies or fittings (hereafter referred to as controls) for burners and gas-burning appliances using fuel gases as natural gas, manufactured gas or liquefied petroleum gas (LPG). It is not applicable to corrosive and waste gases. ISO 23550:2004 is applicable to the following controls: -- automatic shut-off valves; -- burner controls; -- flame supervision devices; -- gas/air ratio controls; -- pressure governors; -- manual taps; -- mechanical thermostats; -- multifunctional controls; -- pressure-sensing devices; -- valve-proving systems; -- zero governors. The methods of test given in ISO 23550:2004 are intended for product type testing. Tests intended for production testing are not specifically included. ISO 23550:2004 is intended to be used in conjunction with the specific control standards of the ISO 23551 series.