我厂以前制造鍋炉管路的三通管(图1)是单个下料后进行焊接,最后进行水压試驗。由于水压試驗前,必須在三通管的端部焊上三块端盖(其中一个在焊好后钻孔攻丝以便引入試压的水),因而非常麻煩,尤其是試驗小体积的三通管,更成了关键問题。根据这种情况,我厂二車間刘启明、陈才南两同志改进了三通管的制造工艺。 The three-way pipe (Figure 1), which used to make boiler tubes in our factory, was welded after a single unloading and finally hydrostatic test was carried out. Before the hydrostatic test, three end caps had to be welded to the ends of the tee (one of them tapping after welding to introduce pressure-tested water), which was very troublesome, especially for testing small volumes of three Management, has become the key issue. According to this situation, two workshops of our factory, Liu Qiming and Chen Cai Nan, improved the manufacturing process of the tee pipe.