Guizhou Foundry Co., Ltd. tells you how to install the thread of the cast iron pipe;
After the Guiyang cast iron pipe is cut, for the convenience of connection and use, we need to thread on a section of Guizhou cast iron pipe. The pipe thread commonly used for connection is British 55 degree pipe thread. The parts of all kinds of connections used at the time of installation are made by the manufacturer in accordance with the professional standards. In general, the tube end will be processed into a conical thread, which can enhance the waterproof effect.
Guizhou Foundry Co., Ltd., when installing thread, first ensure that the thread is correct, there is no phenomenon of partial buckle and buckle. It is also necessary to ensure that the thread is smooth without burrs. If there is a gap and a fracture, the length should not exceed 1/10 of the whole thread of the thread, otherwise it will affect the use. Moreover, the selected thread needs a certain degree of taper, the degree of tightness should be moderate, and the test can be made after the set is set well. It is suitable for 2-3 circles to be unscrewed by empty hands. If too loose will affect the sealing effect, too tight will make the expansion valve. Therefore, when installing the thread, we should pay attention to the tightness. After the thread is connected, it is best to reveal two or three buckles out of the outside.
Disadvantages: for defect repair, repair of small defects (pores, trachoma), due to the impact of large pool edge trace. Welded steel parts have hard points. Because of the heat effect, it is easy to produce hot deformation when welding coloured castings or thin-walled parts. The requirements of operation technology are higher.
Cold welding machine: it is a newly born repair technology in the early twenty-first Century. Because of the small heat generated by the workpiece during the welding repair, it has become a cold welding machine. After several years of development, the application direction and technology of welding machine have been greatly developed, and it has a great share in the repair market. According to the repair product classification: the patch machine and the electric spark surfacing repair machine.