Asme Ptc 4.1.pdf [repack] -

Mandatory for flue gas temperature and composition: measure at 12+ points across duct, equal area annular method.

⚠️ Assuming any boiler test meets PTC 4.1 – The code requires specific test durations, instrumentation accuracy (±1% for flow), and stabilized conditions . ⚠️ Ignoring radiation & convection losses – These are not negligible, especially at lower loads. ⚠️ Mixing methods – Don’t combine direct efficiency steam-side data with indirect flue gas losses inconsistently. Asme Ptc 4.1.pdf

For those analyzing a PTC 4.1 test report, the following parameters are critical. The code details how to measure and calculate each: Mandatory for flue gas temperature and composition: measure