Abstract: Based on relevant tests and applicable standard, comprehensive analysis and comparison relating to the electric welded steel tube for low/medium pressure boiler service are made in terms of material quality, geometric dimension performance under ambient/elevated temperatures, metallographic structure and workability, etc., showing that all the performance/property target values of the said welded tube produced by Harbin Steel Tube Plant have been up to or even better than the requirements as specified in GB 3087-1999 and YB 4102-2000, particularly the good workability both of the weld seam and the base metal and the tube's hi-temperature performance which meets the quality requirements as set for the thermal power plant boiler.