The main production process of high-pressure pipe: tube billet heating, perforation of the tube, the extension of the steel pipe.

High-pressure pipe rolling, pipe diameter and diameter reduction, cooling and finishing of steel pipe or can be said that the steel billet heating perforation Hot-dip pickling cold drawn carbon cutting head spray marking finished product A seamless steel pipe manufacturing method , Comprising the steps of: providing a rolling stand having a plurality of rolls, a plurality of mandrel-type seamless tube mills arranged continuously in different rolling directions, and rolling the seamless steel pipe in such a production line The wall thickness in the circumferential direction of the rolled steel pipe is measured at a plurality of points and at least the positions of both ends of the respective axes of the rolls on the final rolling stand of the mandrel mill are controlled based on the measurement results, In order to minimize wall thickness unevenness. General alloy pipe> Alloy pipe> Alloy pipe> High-pressure alloy pipe Referred to as seamless steel pipe, made of ordinary carbon steel, high-quality carbon steel, ordinary low-alloy steel and alloy structural steel for the production of liquid pipe or production structure, parts use. High pressure pipe is supplied by outer diameter and wall thickness, with a variety of wall thicknesses under the same outer diameter. The pressure range of high pressure pipe is large. Usually the pipe length, hot-rolled pipe is 3-12.5m, cold drawn (rolled) pipe is 1.5-9m.