西德供意大利Tranto用的螺旋焊管设备(图1)能够由16至25米长、6.5至25毫米厚的钢板制造出直径812至2500毫米的管子。按照API标准最硬的钢板材质可用到X65。对于这种结构,因没有可参考的样机,就必须结合新的工艺要求设计新方案,为此,支付了一笔相当大的改进费用。现就改进重点作如下简要说明。 West Germany for Tranto spiral welded pipe equipment (Figure 1) can be 16 to 25 meters long, 6.5 to 25 mm thick steel pipe to make a diameter of 812 to 2500 mm. According to API standards the hardest plate material available X65. For this structure, there is no reference for the prototype, it is necessary to design a new program with new technology requirements, to that end, pay a considerable cost of improvement. The key points for improvement are as follows.