This standard specifies the thermal efficiency and test methods of coal fired, oil fired and electrically heated boilers for daily life.
This standard is applicable to the following fixed boilers for daily life with water being medium and fired by coal, oil and gas or heated with electric energy.
a) Steam boiler with a rated working pressure of at most 1.0MPa and a rated evaporation less than 1t/h;
b) Pressure-bearing hot-water boiler with a rated thermal power less than 0.7MW;
c) Normal pressure hot water boiler (hereinafter referred to as normal pressure boiler) and vacuum phase-change hot water boiler (hereinafter referred to as vacuum boiler).
This standard is not applicable to heat recovery boiler and the boiler not adopting water as medium.
2 Normative References
The following documents are essential or necessary for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendment) applies.
GB 252 General Diesel Fuels
GB 474 Method for Preparation of Coal Sample
GB/T 1576 Water Quality for Industrial Boilers
GB/T 2900.48 Electrotechnical Terminology of Boilers
GB 5749 Standards for Drinking Water Quality
GB 13271 Emission Standard of Air Pollutants for Boiler
SH/T 0356 Fuel Oil
3 Terms and Definitions
For the purposes of this standard, the terms and definitions specified in GB/T 2900.48 and those listed below apply. For convenience of application, some terms and definitions in GB/T 2900.48 are repeatedly listed as follows.
