Seamless steel pipe

　　Seamless steel pipe is made of steel ingots or solid tube through the perforation of the capillary, and then by hot-rolled, cold-rolled or cold dial made. The specifications of the seamless steel pipe are expressed in millimeters in outer diameter and wall thickness. Seamless sub-hot-rolled and cold-rolled (allocated) two types of seamless steel pipe. We mainly produce and export carbon steel seamless steel pipes.