Seamless Steel Pipe supplier Definition: Seamless steel pipe is a steel pipe made of a whole piece of metal without joints on its surface. Classification:� According to different production methods, spiral welded steel pipe can be divided into hot-rolled pipe, cold-rolled pipe, cold drawn pipe, extruded pipe, pipe jacking, etc., all of which have their own process regulations. Materials include ordinary and high-quality carbon structural steel (q215-a-q275-a and 10-50 steel), low alloy steel (09mnv, 16Mn, etc.), alloy steel, stainless acid resistant steel, etc. stainless steel spiral pipe wholesale Application: There are two types of general purpose (for water supply, gas pipeline and structural parts, mechanical parts) and special purpose (for boiler, geological exploration, bearing, acid resistance, etc.)