Threaded seamless steel pipe (referred to as the female) refers to an inner wall of the spiral groove processed into seamless steel pipe. Currently in our own design or abroad 300MW, 600MW and above capacity subcritical and supercritical thermal power boiler, membrane water wall tube widely used within the thread. Compared with ordinary light pipe, threaded pipe can effectively prevent the vapor film is formed between the water and the pipe wall, increasing the light pipe flow disturbance, so that the wall temperature is more uniform, both to avoid the light pipe burn, but also improves the boiler The heat transfer efficiency. Number of thread threaded pipe according to need four, six, eight dollars, the main materials are 20G, SA210C, T2, T12,12Cr1MoVG, 15CrMoG, T22, T23, etc., China's annual required threaded pipe 2.5 ~ 30,000 tons. In order to meet the needs of large-capacity subcritical and supercritical (ultra) supercritical boiler development, Tianjin Pipe Group Co., Ltd. (Tianjin Pipe) using Φ150mm casting tube, there are three roll Pipe Mill Φ168mmPQF provide Φ76mmx9mm shortage tube, through independent die design, successfully developed 15CrMoG material 8 Φ51mmx5.7mm threaded high-pressure boiler tube. The technical requirements of the female threaded high-pressure boiler tube should reach common technical requirements in addition to the light pipe, but also according to GB / T 20409-2006 "high-pressure boiler seamless steel pipe with threaded" standards or purchase each boiler factory norms, its size and thread parameter deviations have different requirements. Such as cold-rolled stainless steel plant in Tianjin Pipe material developed 15CrMoG 8 Φ51mmx5.7mm high-pressure boiler tube threaded structural steel, technical requirements in Table 1. Alloy tube specifications table 25 * 448 * 7108 * 10 168 * 25 * 5 9.5 12.5 48.3 * 108 * 12 168 * 1025 * 5.5 * 51 * 3108 * 1127 * 14 168 3.5 51 3.5 108 * 15 168 * * 1227 * 451 * 4108 * 16 168 * 1427 * 551 * 5108 * 20 168 * 51 * 5.5 * 1527 * 5168 6114 * 1628 * 4114 * 2.5 57 * 6168 * 18 28 * 357 * 5114 * 7168 * 20 Liaocheng Polygram Pipe Manufacturing Co., internally threaded high-pressure boiler pipe main use is for steel pipe plant, nuclear power, high-pressure boiler steel pipes, etc. The main purpose is for the power plant plant structures and equipment on the pipe, nuclear power, high-pressure boiler, superheater and reheater high-pressure high-temperature piping, it is the use of high-quality carbon steel mechanical structural steel, alloy steel and heat-resistant stainless steel materials do , hot rolled (extrusion, expansion) or cold (pull) from. The biggest advantage steel pipe can be 100% recycled, environmentally friendly, energy-saving, resource conservation national strategy, national policy to encourage the expansion of high-pressure alloy pipe applications. At present, the proportion of the total accounted for steel alloy pipe of the developed countries consume only half the field of the use of alloy tubes expanded to provide a broader space for development of the industry. According to the research branch of China Steel Association alloy tube expert group, with an average annual growth of China's future demand for long steel, high alloy pipe up to 10-12%. Shandong Liaocheng Polygram Pipe Manufacturing Co. provides you with non-standard steel pipe, steel pipe is non-standard relative to the Chinese national standard seamless steel pipe shaped in terms of national standard outside, in the production of seamless steel pipe in accordance with national regulatory requirements in diameter size, wall thickness, and should allow a certain degree of error, error in the standard referred to GB range. In practical use, often national standard specification has some limitations, which corresponds to the emergence of non-standard seamless steel pipe, steel pipe non-standard specifications to supplement the national standard specifications and the production of seamless steel tubes, not said worse than the national standard seamless steel quality. In the non-standard steel pipe production, some with national standard seamless steel tube or round as production, because of the small sales volume, prices tend to be higher than the normal national standard seamless steel pipe, seamless steel pipe, but there are drawbacks non-standard structural steel, Because there is no fixed standard, some manufacturers use two seamless steel scrap or defective as seamless tube, so the price is cheaper. So often non-standard seamless steel price volatility, product quality is uneven. Non-standard steel pipe commonly used materials are: 20 #, 45 #, 16Mn (Q345A, B, C, D, E) 27siMn, 20cr, 40cr other steel with steel, structural steel, structural steel buildings from Shandong Liaocheng treasure Licking Pipe Manufacturing Limited. Shandong Liaocheng Polygram Pipe Manufacturing Co. (www.lcbljgg.com) (www.lcbljgg.com) (www.sdlcblj.com) (www.bljggzz.com) strong, credible, Shandong Liaocheng wire, tubes, plates and other manufacturing equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Polygram pipe into the brilliant and you work for a better future! You can also access (www.lcbljgg.com/supply_details_42893840.html), for more information about the company.