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1979年,上海沪江机械厂试制成功了我国第一台φ17～76毫米四线水压试管机(见图1)。这台由一机部西安重型机械研究所设计的水压试管机,具有结构合理、自动化水平高、安全可靠、生产效率高等优点。1980年初,由设计、制造、用户三结合,对四线水压试管机进行了负荷试验,结果表明,在主要技术指标上都达到了设计要求,能够满足焊管试压检验的需要。随着焊管机组焊接速度的高速化和焊管使用范围的不断扩大,要求有高效率的严格检查
In 1979, Shanghai Hujiang Machinery Factory trial success of China’s first φ17 ~ 76 mm four-wire hydraulic test tube machine (see Figure 1). This Taiwan by a machine Xi’an Heavy Machinery Institute designed hydraulic test tube machine, with a reasonable structure, high level of automation, safety and reliability, high production efficiency and so on. In the early 1980s, the load test was carried out on the four-line hydrostatic test tube machine by the combination of design, manufacture and user. The results showed that the design requirements were met on the main technical indexes and the requirements of pressure test on the welded pipe were met. With the rapid increase in the welding pipe welding speed and the use of the continuous expansion of the pipe, requiring a rigorous examination of high efficiency