The production of high-grade steel line pipe is based on a microalloying heating process.
High steel grade line pipe heat treatment process
With the development of pipeline steel plate technology and the progress of welded pipe forming and welding technology, the application scope of welded pipes in pipelines has gradually expanded, especially in the range of large-diameter group spacing, the advantages of welded pipes are more obvious. Coupled with cost factors, welded pipes have become more and more popular in pipelines. The pipe field has always occupied a dominant position, which has restricted the development of stainless steel seamless pipeline pipes. In 2004, it produced approximately 400,000 tons of seamless line pipes, with steel grades including X42-70 and varieties including onshore and subsea pipelines.
The production of high-grade steel grade pipeline pipes uses a microalloying heat treatment process. The production cost of seamless stainless steel pipes is significantly higher than that of welded pipes. With the improvement of steel grades, such as X80 and above steel grade line pipes are limited by carbon equivalent, conventional It is difficult for seamless steel pipes with advanced technology to meet user requirements; all 12Cr1moV alloy pipe manufacturers have conducted scientific research on the anti-corrosion performance, low-temperature and high-temperature environments, and stable performance of their pipeline pipes. Stable performance and scientific research work.
