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High Pressure aisi 4130 alloy steel tube Read More. 80mm diameter 304 6 inch welded stainless steel pipe fittings Read More. stainless steel pipe nipples Read More. MS Thin Wall Rectangular Steel Hollow Sections Pipe [steel]MS Thin Wall Rectangular Steel Hollow Sections Pipe Qinyi 12 Qinyi Products Made In China, China Manufacturer. Professional Ms Pipe Supplier & Erw Round Tube Tyt Steel1.All the pipes is high-frequency welded. 2.Both inner and outer welded stab can be removed. 3.Special design available according to requirement. 4.Pipe can be necked down and punched holes. 5.Supplying BV or SGS Inspection if client need. Selection of City Gas Steel PipeMay 21, 2019 · The steel pipes used in gas engineering are generally made of high quality low carbon steel (generally referred to as Q235B) or low alloy steel (generally referred to as Q345B). 1. Material selection of steel pipes The steel pipes used for urban gas pipelines mainly include two types of seamless steel pipes and welded steel pipes. The strength of seamless steel tubes is very high, but limited by
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