Spiral steel pipe is a spiral seam seamless steel pipe made of hot-rolled strip steel and cold-rolled coils as raw materials, extruded at normal temperature, and electric welded with a fully automatic double-wire double-sided arc welding process. Using the advanced double-sided arc welding process,
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Hot dip galvanizing is a metallurgical reaction process. From a microscopic perspective, the hot-dip galvanizing process is composed of two dynamic balances: thermal balance and zinc-iron exchange balance. When a steel workpiece is immersed in molten zinc liquid at about 450°C, the workpiece at roo
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Galvanized coilA coiled plate is a type of steel plate. It is a long and narrow thin steel plate supplied in rolls. For coils and flat plates, it is almost a cut package; a cold coiled plate is a hot-rolled coil that has been pickled and cold-rolled. owned. It can be said to be a type of cold rolled
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Uniformity of galvanized layer Galvanized steel pipes should be tested for uniformity of galvanized layer. The steel pipe sample shall not turn red (copper-plated color) when immersed in copper sulfate solution for 5 consecutive times.1. Standard classification of galvanized pipesGeneral steel pipes
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TIANJIN YUANTAI DERUN PIPE MANUFACTURING GROUP CO., LTD
