Cold drawn tubes are divided into two kinds of circular tube shaped tube:
Cold drawn steel tubes generally require multi pass drawing. Between each drawing must have corresponding stress annealing, to ensure smooth under a cold drawing. From the appearance of cold rolled seamless steel pipes are often a small diameter, hot-rolled seamless steel pipes are often large diameter. The precision of cold rolling seamless steel pipes are higher than that of hot rolled seamless steel pipes, and the price is higher than that of hot rolled seamless steel pipes. Cold drawn seamless pipes generally smaller diameter, mostly below 127mm.
Especially the cold drawn seamless pipes diameter precision is very high, cold drawn seamless pipes length is shorter than the hot-rolled seamless pipes. The wall thickness of cold drawn seamless pipes than hot-rolled seamless pipes uniform.