This standard specifies the technical requirements, inspection and testing, test methods, paint, packaging, marking and random documents, installation and use, acceptance, quality responsibility and other requirements for industrial boilers. This standard is applicable to fixed steel steam boilers using water as the medium with a rated steam pressure greater than 0.04MPa but less than 3.8MPa and a rated evaporation capacity not less than 0.1t/h and fixed steel steam boilers with a rated outlet water pressure greater than 0.1MPa. Hot water boiler.