spiral welded pipe technology

    Since the beginning of the 21st century, our spiral pipe technology and technical equipment has a small new breakthroughs, mainly in Bu several:

    Solve (1) in the spiral welded pipe (55Aw), edge milling, high-speed welding, pipe end full circle and the end of a pipe weld automatic grinding problems, creating favorable conditions for long-distance pipeline for the production of spiral welded pipe, and in domestic pre-finishing welding process development.

    (2) in legislation seam high frequency welded pipe (ERw) the introduction of high efficiency milling machines, a new row of roll molding and flexible molding and its rapid roll changing system. There are high power with state high frequency welding and automatic temperature control system, burr clear, double heat treatment technology and iron cut the turtle saw technology and equipment, while the domestic production unit and solid-state high of more than 20 sets in diameter, MF devices.

    (3) in the loss detection power 'surface are set in finishing non-destructive testing equipment, including the style of the whole tube or weld white moving uT, with storage function of X-ray inspection, magnetic particle inspection. There are board installed in the pipe segment probe, tube, and weld inspection.

    (4) production: hydraulic test Welded steel Pipe machine is automatically saved for each spiral welded pipe test data, weld up and white moving drainage pole control, the test pressure up to 110 MPa, pressure holding time of up to 15-20 seconds.

    Since the 1990s, especially into the 2l century later, China welded pipe equipment manufacturing equipment manufacturing power forward. Shijiazhuang, Taiyuan, Baoding, Tianjin, Dalian, Shanghai and other manufacturers to foreign countries to the u of a large number of spiral welded pipe mill equipment and other equipment, such as loopers, flying saw, roller, high-frequency equipment, etc.

 Flying saw the development of equipment

    Higher by wide RRw production rate, some of productivity rectangular tube, so the higher the technical difficulty of the flying saw equipment.

    Foreign online sawing the widespread use of new digital school profiling milling saw Li J roll sawing. So that when the production tube are rolling sawing; against the force of the rectangular tube, the use of milling sawing, milling and sawing with multiple knowledge piece around the pipe contour to quickly cut off the steel pipe, which is true not only with high-speed rotation of the radial know group movement, rectangular cross-section shape of the clothing and cut into pieces and set n4 there weeks N trajectory passes. CNC profiling milling saw is characterized by: do u good quality people burr, especially applicable to the thick-walled rectangular pipe cut off. Domestic New Petroleum days rather 6Io EBw, the whole training pipeline 610 of ERW, and the Baoji pieces of gold the public to 426ERw number of ERW welded pipe unit from abroad this knowledge cutting equipment, and has successively served but production.

    Servant hair 61l of this high-tech CNC profiling milling saw within Shen workers and other units have been studied, has been applied more widely.

 

    West-East pipeline project during the Tenth Five-Year "national arrangements for the construction of the large infrastructure, with a total investment of more than 46 billion yuan, thousand works to the Tarim Basin, Xinjiang's natural gas sent to the Yu Wan Ting Zhejiang and Shanghai area. The project was officially launched in February 2000, and officially opened in July 2002, 2004] o one is put into operation across the board:.

    West-East Pipeline] - Cheng West Xinjiang Luntai, east to Shanghai. Along the 10 provinces, municipalities, through Xinjiang, even Gansu, Ningxia, Shaanxi, Shanxi, Henan, Anhui, Jiangsu, Shanghai, Zhejiang. Pipeline project through the Gobi desert, Loess Plateau, the Taihang Mountains, across the Yellow River, Huaihe River, Yangtze River, China's was the longest, largest investment, the gas member of the largest and most complex construction conditions gas transmission, natural gas project trunk pipe length of 4200 km, the gas scale designed for the transmission and commodity gas to 12 billion m 5 to become China's first large-diameter, long post from high pressure, multi-level pressure, high-grade pipeline steel and across the Yangtze River The broad lower reaches of the river while the modern, world-class natural gas trunk pipelines; the project will serve as the first major construction project in the new century All manned annals.