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Electric Resistance Welded (ERW) pipes are steel pipes produced by welding strips or coils of steel longitudinally. The process involves passing a high-frequency electric current through the edges of the steel strip or coil, heating it to the point where the edges melt and fuse together. The result is a seamless-looking pipe with excellent dimensional accuracy.
2. Manufacturing ProcessThe manufacturing process of ERW pipes can be summarized as follows:
Coil Preparation: Steel coils are unrolled and flattened to create a flat strip of steel.
Forming: The flat strip is shaped into a cylindrical shape, and the edges are pressed together to form a pipe.
Welding: High-frequency electrical resistance welding is used to join the edges of the pipe. This process involves passing an electrical current through the steel, heating it to the point of fusion, and forming a strong bond.
Sizing and Cutting: The welded pipe is then sized to the desired dimensions and cut to the required lengths.
Testing and Inspection: ERW pipes undergo various tests and inspections to ensure they meet industry standards and specifications.
ERW pipes exhibit several key properties that make them suitable for a wide range of applications:
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