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随着石油、化工、合成纤维等工业的不断发展,采用活套法兰(或称松套法兰)的各类输送物料的工艺管道愈来愈多。如四川维尼纶厂化纤分厂的各类物料管道中,活套法兰即达10000余个、27种规格。国内以往大多采用焊环,特别是直径大于200毫米以上的管道,要先用等离子切割机将不锈钢板制成圆坏,然后焊到直管上。这样,加工切割困难,劳动强度大,工效低,而且焊接后易变形。我公司原加工修配厂三车间职工用一般锻锤冲压成功直径150毫米以下不锈钢管
With the continuous development of industries such as petroleum, chemical industry and synthetic fiber, there are more and more process pipes for conveying materials by using looper flanges (or loose-flange). Such as the Sichuan Vinylon Fiber Plant chemical fiber pipeline of various types of materials, the flange that is up to more than 10,000, 27 kinds of specifications. In the past mostly used in the domestic welding ring, especially pipe diameter greater than 200 mm, the first plasma cutting machine will be made of stainless steel round bad, and then welded to the straight tube. In this way, processing and cutting difficult, labor-intensive, low efficiency, but also easy to deform after welding. Our company’s original processing and repair shop three workshop workers with a normal forging stamping success diameter of 150 mm or less stainless steel tube