Stainless steel pipe production technology development trend 2.1 "three-step method of steelmaking and continuous casting process using three-step method steelmaking and continuous casting production of stainless steel tube technology to improve the quality of stainless steel tube, diaphragm to reduce costs to create the conditions. Some of the world's leading stainless steel plant in the "two-step" on the basis of research and adoption of the new technology of the three-step method of smelting of stainless steel. At present, most of the professional stainless steel plant in Japan have adopted the "three steps" production process. German 曼内斯曼德 Mark metallurgical technology company has developed a set specifically for the "three-step" process equipment, which includes an ultra-high power electric furnace 2.2 hot extrusion process hot extrusion process is the world's current thermal processing stainless steel seamless pipe production process. As technology advances, some types of hot-rolled steel unit can produce stainless steel pipe extrusion unit is the world's main production unit of stainless steel seamless pipe. At present, the world has more than 60 sets of extrusion unit, minority is used to profile extrusion, 70% of the units for the production of steel, metallurgical microscope main varieties of stainless steel pipe. 2.3 cold to cold-rolled, cold drawn, supplemented by the cold stainless steel tend to be mainly in cold-rolled, cold drawn, supplemented by joint production process, cold rolling machine, drawing machine to high-speed, high precision, long stroke, multi-line direction. Stainless steel tube with 50% ~ 80% of finished products through the cold. Therefore, the development of the cold process equipment given more attention. The cold process there are three cold drawing process, cold rolling, cold rolling, a cold-drawn combination process. Stainless steel tube of cold working abroad in most cases, cold-rolled to a cold drawing of the joint process, mainly in cold-rolled, cold drawn, supplemented by the processing methods. Modern cold rolling mill to achieve the greatly reduced diameter and greatly reduced wall of the amount, 80% rolling reduction in cold rolling mill. Diaphragm made of cold rolled fixed wall, supplemented by cold drawing to change the specifications and control diameter, to meet the requirements of the different varieties and specifications. For production of cold-rolled a cold drawn, the advantages are: good quality steel, cold-rolled steel pipe wall thickness accuracy and surface quality, cold-drawn to ensure the accuracy of pipe diameter; short cold cycle, reduce intermediate degreasing, heat treatment, necking, Jiao until the process, save energy, reduce metal consumption; can be large-size waste pipe production of small diameter steel pipe, 2.4 a variety of welding technology advances in welding technology to accelerate the development of stainless steel pipe production, metallurgical microscope variety of welding The application of the method to further improve the welding quality and productivity. At present, the industrial application of stainless steel welding method TIG welding, high frequency welding, plasma welding and laser welding. Several welding methods most frequently used is argon arc welding and high frequency welding: 2.4.3 The combination of welding stainless steel pipe of various welding methods have their own strengths and weaknesses. How to avoid weaknesses, several welding methods to be combined to form a new welding process to meet the requirements of stainless steel welded pipe quality and production efficiency, is the new trend of development of stainless steel welded pipe World Pipe network informed. After recent years of exploration and research, the combination of welding technology has made progress, stainless steel pipe Japan, France and other countries have mastered a certain combination of stainless steel pipe production welding technology. The combination of welding methods: argon arc + plasma welding, high frequency welding + plasma arc welding, high frequency warm-up + 3 torch argon arc welding, high frequency preheat + plasma welding + argon arc. The combination of welding to improve the welding speed is very significant. For a combination of high-frequency preheating welding, steel pipe weld quality with conventional arc welding, plasma welding, the welding operation is simple, the entire welding system is easy to automate, this combination is easy to converge with the existing high-frequency welding equipment. The investment cost-effective. 3: Conclusion stainless steel pipe production in China after 40 years, especially the development of the past 20 years, whether it is stainless steel seamless or welded pipe production technology has made great progress in increasing and improving the yield, quality and variety, a few products The quality has reached international advanced level. And international advanced level, China's stainless steel pipe factory in the production process, the level of equipment, operating techniques, and product quality are still a large gap between the need for technological innovation and improve, to adapt to the requirements of China's national economic development. From the market analysis and forecasting can be seen that the prospects of China's stainless steel tube. But it must be soberly aware that with the advent of economic globalization, the domestic stainless steel market will face the challenges of the international market, that our opponent will be the world's leading stainless steel consortium, the competition is quite intense. In this regard, as the domestic stainless steel pipe manufacturers should grasp the technological innovation, and improved: the Art technology and equipment, strengthen modern management, increase productivity, increase product variety, improve quality, reduce costs, improve service, so that China's stainless steel production occupation of the domestic stainless steel market and the technology has reached international advanced level World pipe network reported that the world's steel pipe network to provide the world's steel pipe network editor , and to create favorable conditions to develop the international market. To this end, China's stainless steel pipe production technology should enhance the development of the world's most advanced and mature technology in producing stainless steel seamless pipe: (1). Stainless steel pipe Russian trunk pipeline with large-diameter welded steel pipe production and development trend of nearly two decades, the new Russian mining and put into operation a number of new oil and gas fields, including mining and transportation of most of the gas fields in subzero temperatures, and even implemented in seawater . The parameters of the pipeline, depending on the quantity of natural gas pipeline and gas storage capacity of gas fields: the Russian natural gas pipeline 15 diameter is generally not more than 1 420, google left side of ranked pipeline is generally not more than 1 020mm.