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May 12, 2015 · This month we take a hard look at the differences between ERW, DOM and Seamless Tube. ERW (Electric Resistance Welded) The nomenclature ERW refers to a specific type of welding process that involves both spot and seam welding. Seam welding is commonly used during the manufacturing of round, square and rectangular steel tubing. The steel strip building material hollow tube metal erwDifference between ERW, DOM and Seamless Tube | Metal building material hollow tube metal erwMay 12, 2015 · This month we take a hard look at the differences between ERW, DOM and Seamless Tube. ERW (Electric Resistance Welded) The nomenclature ERW refers to a specific type of welding process that involves both spot and seam welding. Seam welding is commonly used during the manufacturing of round, square and rectangular steel tubing. The steel strip building material hollow tube metal erwChina metal square pipes wholesale - AlibabaChina Supplier Building Materials Steel Tube Metal Pipe Product information: Material: Q195 Q215 Grade: GB / T 13973 - 1992 Shape: Round, square, rectangular, oval, triangle, elliptical Wall thickness: 0.6 - 2.5 mm Length: Up to 6m, or according to customer's requirement.

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