Pipeline pipe is the extraction of oil, gas and water from the ground through pipelines to the oil and gas industry. Pipeline consists of seamless pipe and welded steel pipe with flat, threaded ends and socket ends on the pipe end; Ways for the end of welding, couplings, socket connection, etc.

 

With the development of pipeline steel technology and the progress of welding pipe molding and welding technology, the application range of pipe welding pipe is gradually expanding. Especially in the range of large caliber welding pipe, the advantage of pipe welding is more wet and the cost factor, In the field of pipelines dominate, limiting the development of stainless steel seamless pipe. Seamless pipe production in 2004 about 400,000 tons, including steel grade X42-70, a variety of land-line pipe and submarine pipeline steel.

At present, the production of high-grade pipeline steel pipe is micro-alloyed heat treatment process, the production cost of stainless steel seamless pipe is obviously higher than that of welded pipe, and with the increase of steel grade, such as the steel equivalent of X80 grade steel pipe, Conventional process seamless steel pipe is difficult to meet user requirements; the current 12Cr1moV alloy pipe production plants are in order to improve its pipeline corrosion resistance, low temperature, high temperature performance of the use of stable performance and carry out research work.

Steel pipe weight calculation formula: [(OD - wall thickness) * wall thickness] * 0.02466 = kg / m (weight per meter)