ISO 23550 pdf download Safety and control devices for gas burners and gas-burning appliances — General requirements This International Standard specifies safety, constructional and performance requirements and testing ofsafety control or regulating devices and sub-assemblies or fitings (hereafter referred to as controls) forburners and gas-burning appliances using such fuel gases as natural gas, manufactured gas or liquefiedpetroleum gas (LPG). It...