High-pressure steel pipe rolling, pipe sizing, reducing steel pipe, steel pipe finishing and cooling or heating can be said Billet piercing heat tie pickling cold drawn carbon burning cutting head spray subscript finished packing one kind of seamless steel pipe manufacturing method characterized by: setting a plurality of rolling stands having rolls to the rolling direction of mutually different configuration of multiple continuous mandrel mill, in such a manufacturing line to be rolled seamless steel pipe both end positions after each axis system, measuring pipe circumferential direction after rolling on the multi-point, according to the measurement results, at least control the mandrel mill the final rolling mill roll base , so uneven wall thickness to a minimum.

Usually high alloy tubes ordinary carbon steel, high carbon steel, alloy steel and common low-alloy structural steel for the production of liquid transportation pipeline or production structure, with parts. High pressure supply pipe diameter and wall thickness, in the same outer diameter greater variety of wall thickness, high pressure pipe pressure range. Typically the length of steel, hot-rolled tube 3-12.5m, cold drawn (rolled) pipe is 1.5-9m. Before use must first check whether there is anything abnormal, such as the appearance of deformed fittings for pressing, while the double-headed spring (rubber sleeve) must fit into the joints, is the most vulnerable place to protect joints and high-pressure steel pipe, can be avoided when closing the tube 90 degrees or 180 degrees of impairment, easy to use while generating squib or agent of the leak case.