Generally seamless steel pipe 10 #, 20 #, 30 #, 35 #, 45 # quality carbon structural steel Q345B 16Mn 5MnV low alloy structural steel or 40Cr 30CrMnSi 45Mn2, 40MnB such as a structural steel hot-rolled or cold-rolled steel. (18622303953) 10 #, 20 # and other low-carbon steel seamless pipe for fluid pipes. 45,40 Cr, etc. made of carbon steel seamless pipe used in the manufacture of mechanical parts, such as automobiles, tractors, and the force components. General seamless steel pipes to ensure the strength and flattening test. Hot-rolled steel hot-rolled state or heat treatment delivery; cold-rolled to heat treatment delivery. Common market following four forms of seamless pipe: seamless structure (GB/T8162-2008) is a seamless pipe for general structure and mechanical structure. Transmission fluid with seamless pipe (GB/T8163-2008) a general seamless pipes used to transport water, oil, gas and other fluid. Low and medium pressure boiler seamless pipe (GB3087-2008) is used in the manufacture of various structural low and medium pressure boiler superheated steam pipes, boiling water pipe and locomotive boiler superheated steam pipes, opium pipe, small smoke pipe and arch brick works quality carbon structural steel hot-rolled and cold drawn (rolled) seamless pipe. The high-pressure boiler seamless pipe (GB5310-2008) is used in the manufacture of high-pressure and above pressure water tube boiler heating surface with high-quality carbon steel, alloy steel and heat-resistant stainless steel seamless pipe. Seamless steel tubes Overview: seamless steel pipe specification OD * wall thickness of a few millimeters. Seamless steel pipe division hot-rolled and cold-rolled (dial) seamless steel pipe two categories. Rolled seamless steel pipe division generally seamless steel pipe, low and medium pressure boiler pipe, high pressure boiler tube, alloy steel pipe, stainless steel pipe, oil cracking pipe, geological steel pipe and other seamless steel tubes. Cold-rolled (dial) seamless steel pipe in addition to seamless steel tubes in general, low and medium pressure boiler seamless steel tubes, high pressure boiler seamless pipe, alloy seamless steel pipe, stainless steel seamless pipe, petroleum cracking, other no wall seamless carbon and alloy thin-walled seamless steel pipe, stainless steel thin-walled seamless steel pipe, shaped seamless steel pipe, pipe joints.