High quality carbon steel, fine drawing, no oxidation bright heat treatment (NBK state), non-destructive testing, the inner wall of the steel pipe with special equipment scrub and after high pressure washing, rust prevention oil on the steel pipe for rust prevention treatment, both ends of the cover for dust treatment.Shandong Zhongao Steel Co. LTD. is a steel producer located in northern China. Focus on selling different kinds of steel. Such as rebar, U steel groove, C steel groove, I steel groove, H steel groove, steel pipe, galvanized steel pipe and steel plate. We have steel mills and many other steel product partners. We can provide you with different kinds of steel products according to customer requirements, with different standards. Welcome to contact us!Precision steel pipe is a kind of high precision steel pipe material after finishing drawing or cold rolling. Due to the advantages of no oxide layer on the inner and outer walls of precision bright tube, no leakage under high pressure, high precision, high finish, cold bending without deformation, flaring, flattening without cracks and so on.High precision, good finish, after heat treatment of steel pipe inner and outer walls without oxide layer, good inner wall cleanliness, steel pipe under high pressure, cold bending without deformation, flaring, flattening without cracks, can do a variety of complex deformation and mechanical processing.