The quilted pipe is a kind of high-precision steel pipe that is processed by cold-drawn pipe or hot-rolled pipe. Due to the advantages of no oxide layer on the inner and outer walls of the quilted pipe, no leakage under high pressure, smooth inner wall surface, cold bending, flaring, flattening and no cracks, it is mainly used to produce pneumatic or hydraulic cylinder products. The quilted tube has metal elements such as carbon C , silicon Si , manganese Mn , sulfur S , phosphorus P , chromium Cr and so on.
" Fine extubation ," can be said to be precise " cold drawn pipe ", high dimensional accuracy , it can be used hydraulic pulling machine pulling machine with a chain , but the premise is that we must ensure dimensional accuracy . Small size of the main chain is pulling machine Usually wall thickness greater than 2.5mm , large size using a hydraulic pulling machine is generally greater than the wall thickness of 5mm , pull out the pipe system , the dimensional accuracy higher than the hot-rolled tubes . typically using a hydraulic ram.