Definition and production of high-pressure boiler tube high-pressure boiler pipe is mainly used to manufacture high pressure steam boiler and above pipelines with high-quality carbon steel, alloy steel and heat-resistant stainless steel seamless pipe, boiler pipe through which the party at a high temperature and high pressure work, pipes will occur at high temperature gas and steam oxidation and corrosion seamless steel pipe spec sheet, thus requiring a durable steel with high strength, high oxidation resistance, and good organization stability, use of steel are: high quality carbon steel, structural steel have 20G, 20MnG, 25MnG; alloy steel steel 15MoG, 20MoG, 12,15,12Cr2MoG, 12,12Cr3 etc; heat-resistant stainless steel used 1Cr18Ni9, 1Cr18Ni11Nb high pressure boiler pipe in addition to chemical composition and mechanical properties of seamless steel tubes, hydraulic test done by the root, to be flaring, flattening test. Steel to heat treatment delivery. In addition, finished steel microstructure, grain size, decarburization there are certain requirements. Is a seamless boiler tubes. Seamless same manufacturing method, but the steel pipe used for the manufacture of steel, there are strict requirements. Depending on the temperature level is divided into two general boiler tubes and high pressure boiler pipe. 15CrMo steel thick-walled high-pressure pipe welding using two welding solutions are feasible. In order to ensure that the weld metal to match the performance of the same mother and has a high heat resistance, better use of the program Ⅰ thick-walled seamless steel tubes, the key is to post weld heat treatment process must be strictly controlled. After the program, although Ⅱ weld heat treatment can be omitted, but the migration of carbon diffusion welds at high temperatures resulting in the possibility of weld failure can not be ignored, so only the post-weld heat treatment can not be cautious when using small diameter seamless steel pipe _ phosphide seamless steel (certified) _ Qingdao seamless steel pipe industry by virtue of Liaocheng Limited. Liaocheng virtue Pipe Co., Ltd. (www.meidegc.com) (www.meidegc.com) (www.mdwfg.com) (www.mdggc.com) Shandong Liaocheng, steel leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Industry leaders in the United States and Germany with the staff warmly welcome all inquiries negotiations to create the virtues pipe industry a better future.