API5L PIPELINE TECHNOLOGY

API 5L line pipe generally refers –API 5L line pipe, line pipe is put out of the ground oil, gas, water, transport by pipeline to pipe oil and gas industry enterprises. Linepipe including seamless and welded steel pipe, the pipe end has a blunt end, threaded end and socket end; its connection as welding, coupling, socket connections

Technology

With the development of technology and pipeline steel pipe forming, welding technology advances, the line gradually expanding the scope of application with the pipe, particularly in the large-diameter pipe group from within the range of advantages more apparent wet, plus the cost factor, is pipe in the field of line pipe dominant position, limiting the development of stainless steel seamless line pipe. 2004 Seamless line pipe production of about 400 000 t, including steel grade X42-70, varieties onshore pipeline and subsea pipeline.

API5L line pipe production at present is the use of micro-alloying heat treatment process, stainless steel seamless pipe production costs are significantly higher, and with the steel grade improvement, such as the X80 grade steel pipeline above limit carbon equivalent, seamless pipe conventional process is difficult to meet user requirements; present the 12Cr1moV alloy pipe production plant in order to improve its pipeline corrosion resistance, low temperature, high temperature environment stable performance and carry out research work. In this regard, Pangang Group Chengdu Iron & Steel Co., Ltd. has begun the transformation process.