SSAW Pipe

　　 Boiler tube after a long run, the inevitable emergence of scale, corrosion problems, boiler scale formation is the main reason for the water with a hardness of ingredients, through subsequent high-temperature, high-pressure continuously concentrated by evaporation occurs in the furnace a series of physical, chemical reactions, culminating in the heating surface to form a hard, dense scale. 　　Boiler tube cleaning by definition refers to remove an internal scale boiler chemicals, widely used in electric boiler cleaning, boiler cleaning oil, gas boiler cleaning, coal-fired boiler cleaning, water furnace cleaning, hot water boiler cleaning, heating boiler cleaning, boiler cleaning baths, steam boiler plate heat exchanger cleaning and cleaning and so on. 　　A portion of the boiler water after the water evaporated by heating, and had a bad dissolution of calcium sulfate (CaSO4, gypsum is calcium sulfate containing water of crystallization) precipitated. Original dissolved calcium bica...

　 　Boiler tubes 　　Defect localization and analysis, mainly for the defect depth 0.2 ~ 0.5mm, the length of 20 ~ 50mm superficial cracks, which causes the piercing of minute defects generated in the process, or rolling the first and second plurality of specifications by trauma, Four planes during rolling 20g high-pressure boiler tube by the inner surface of the oxide residue effects formed in the slide and scarring defects, these defects after rolling reduction of squash and stretch Zhang aggravated. 　　Through the high-pressure boiler tube double length number tracking found that injury concentrated in the steel tube end report first, twice-foot (from the pipe end within 25m), is closely related to the capillary head borax oxide accumulation, small-diameter steel pipe defect in the front of the capillary the higher the ratio of the rolling zone appears. Through the above analysis we can draw the following conclusions: 　　(1) the presence of perforated capillary end in addition to ...