High Steel Grade Line Pipe

The production of high steel grade line pipe is based on a micro-alloying heating process.

Heat treatment process of high steel grade line pipe

With the development of pipeline steel plate technology and welded pipe molding, welding technology advances, welded pipe for pipeline applications in the gradual expansion of the scope, especially in the large-diameter group spacing range of welded pipe advantages are more wet, coupled with cost factors, welded pipe has been dominant in the field of pipeline pipe, which restricts the development of stainless steel seamless pipeline pipe. 2004 production of seamless pipeline pipe of about 400,000 tons, steel grades including X42 -70, varieties of onshore line pipe and submarine line pipe.

The production of high steel grade line pipe is the use of micro-alloying heating treatment process, seamless stainless steel pipe production costs are significantly higher than the welded pipe, and with the increase in steel grade, such as X80 above the steel grade line pipe on the carbon equivalent of the restrictions, the conventional process of seamless steel pipe is difficult to meet the requirements of the user; each 12Cr1moV alloy pipe manufacturers are in the process of improving the anti-corrosion properties of its line pipe, low and high temperature environment, and the use of stable performance and scientific research. Stabilization of performance and scientific research work.