This specification is applicable to the design of industrial, civil and regional boiler rooms and their outdoor heat pipes in the following scopes: 1 For steam boiler boiler rooms with water as the medium, the rated evaporation capacity of a single boiler is 1-75t/h, and the rated outlet steam The pressure is 0.10-3.82MPa (gauge pressure), and the rated outlet steam temperature is less than or equal to 450℃; Pressure), the rated outlet water temperature is less than or equal to 180 ℃; 3 Outdoor steam pipes, condensate pipes and closed circulation hot water systems that meet the parameters of paragraphs 1 and 2 of this article. 4 This specification does not apply to the design of boiler rooms and urban heating networks for waste heat boilers, waste incineration boilers and other special types of boilers. 5 The design of the boiler room shall not only comply with this code, but also comply with the current relevant mandatory standards of the country.