Water Engineering DN300 10mm Welded Steel Pipe Astm a53 Gr.b

High Frequency Welded Steel Pipe Water Engineering ERW Steel Pipe

American APL standard or GB/T9711.1 standard, the end is repaired and beveled, and the delivery length is fixed.In recent years, various natural gas pipeline engineering and gas companies have widely adopted ERW steel pipe as the main pipe of urban pipeline network.Pipeline pipe is also a wire pipe, relatively thin, with "T", can only be used for threading. ERW pipe is "high-frequency resistance welded steel pipe", and the welding process is not the same as the ordinary welded pipe, the weld is melted by the base metal of the steel strip body, the mechanical strength is better than the general welded pipe.

According to the different welding technology of high frequency straight seam welded steel pipe can be divided into straight seam high frequency resistance welded steel pipe and straight seam high frequency induction welded steel pipe.The forming process generally adopts the rolling cold forming method.

The diameter of high frequency straight seam welded steel pipe is generally small, generally below 660mmor 26in outside diameter. High-frequency straight seam welded steel tube process: longitudinal shear -- uncoiling -- strip flattening -- head and tail shear -- strip butt welding -- sleeve storage -- forming -- welding -- removing burrs -- sizing -- flaw detection -- flying cut -- initial inspection -- straightening of steel tubes -- pipe section processing -- hydrostatic test -- flaw detection -- printing and coating -- finished products.