本文所论述“管式加热炉”，是石油炼制，石油化工和化学、化纤工业中使用的工艺加热炉,主要技术指标有热负荷，炉膛热强度，炉管表面热强度，炉膛温度，管内流速及压力降。-This article discusses the " tubular-furnace"　is the petroleum refining, petrochemical and chemical, chemical fiber technology used in industrial furnace, the main technical indicators heat load, the furnace heat intensity, heat intensity of the surface of furnace tube, the furnace temperature, the tube flow rate and pressure drop.