the production of hot-rolled seamless tube generally requires two heatings from the billet to the finished steel pipe, that is, the heating of the billet before piercing and the reheating of the blank pipe after rolling before sizing. when producing cold-rolled steel tubes, it is necessary to use in

definition and characteristics of delamination defects:delamination is a layered separation phenomenon parallel to the tube wall inside a seamless steel tube, usually caused by non-metallic inclusions, pores, shrinkage residuals or improper rolling process.its characteristics include:macroscopic man

there are many kinds of seamless tube (smls) production equipment according to the seamless steel tube production process. however, regardless of the rolling, extrusion, top pressing or spinning seamless steel tube manufacturing process, the billet heating equipment is inseparable, so the billet hea

cold processing of steel pipes (such as cold drawn seamless tubes) includes methods such as cold rolling, cold drawing, cold tension reduction and spinning, which are the main methods for producing precision thin-walled and high-strength pipes. among them, cold rolling and cold drawing are comm

cold drawn seamless tubing (cds) is a cold drawn steel tube which offers uniform tolerances, enhanced machinability and increased strength and tolerances compared to hot-rolled products. produced from hot rolled 1026, the cold drawing process increases the tube's physical properties and offers bette