Qualified billet is a precondition for pipe production,not only for seamless steel pipe,or ssaw steel pipe,lsaw steel pipe,almost for all kinds of steel pipe.
Special oil tube is mainly used for transporting oil and gas and petroleum oil and gas well drilling . It includes oil drilling pipe, oil casing and tubing pumping.
To ensure the quality of spiral steel pipe, spiral steel pipe before delivery should be carried out with a number of strict quality testing.
Electroslag welding includes the molten melt mouth,non-molten mouth, wire electroslag welding, plate electroslag welding.