The commonly used standards of boiler performance test in China are briefly introduced

including Chinese standards and American standards. Because different standard versions will bring differences in the test results

it is necessary to study how to use different standard versions

thus to help engineers better understand and master the utilization of different standard versions in actual projects. The differences of boiler efficiency calculation method between ASME PTC4.1—1964 and ASME PTC4—2013 are discussed

and the difference in definition and application range of boiler efficiency

as well as the reference temperature and main heat loss calculation

are compared in detail. The calculation results of the performance test case show that: if the physical input heat is ignored

the relative deviation of the boiler efficiency calculated by the two standards is 0.054%; if the physical input heat is considered

the relative deviation of the gross efficiency calculated by the two standards is 0.055%

and the relative deviation of the fuel efficiency is 0.079%.