Famous people often have to lengthen the pipe, welding them. Typically, the junction is covered with coupling (length of another pipe, the inner diameter of which is slightly larger than the outer diameter of the connected), and it ends scald the details of two circular seams. Well, if there is at hand a suitable clutch? There is another way of welding joints. In this case, the end of one pipe is heated in a flame red glow and flare mites, and the other pipe is removed with a file deep chamfer. Then join pipe and weld in a circle. This is especially convenient method when connecting pipes of different (but close) diameter, and when working with gas welding. E. and V. KAZAKOVA, Saransk
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