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Description. Q235B spiral steel pipe product description: Q235B spiral steel pipe is a common materials in spiral tubes. It is a spiral seam steel pipe which It is based on strip coiled sheet and is extruded at room temperature, and welded by automatic double-wire double-sided submerged arc welding process.Reliable Supplier High Quality Ssaw Welding Steel Pipe high quality q235b welded 40mm diameter erw steel pipeSpiral steel pipe was made by steel ciol, extrusion forming under the normal temperature, take the technology of double wire and double-faced submerged-arc welded. Spiral steel pipe was mainly used in public waterworks, petrochemical industry, chemical industry, electric power industry, agricultural irrigation and urban construction etc.gb t 18248 welded pipe - ERW Steel Pipe - ERW Steel Pipes high quality q235b welded 40mm diameter erw steel pipeExporter and importer GB/T 18248 35CrMo Alloy steel pipe . GB/T 18248 35CrMo Steel Alloy Structural Steel is used make all kinds of fasteners, high pressure pipe and more advanced carburized parts, such as gear, shaft, etc ,which work in the noncorrosive medium and temperature below 250 , working with nitrogen hydrogen mixture in the medium.