DIRECT Press connection pipes with an inner polymer coating and cast-iron pipes nodular (ductile iron)

摘要

A utility model may be used in conjunction as a steel pipe with an inner polymer coating and the pipe of ductile cast iron with nodular pressing method. Technical Problem Utility Model - simplification of the connecting pipes and reducing costs. The problem is solved in that the sleeve is formed with a stopper at an angle of 60 ° as well as at the ends of the pipe, wherein each end coupling is located portion 20 mm in length for the entry of the pipe equal diameter to the connecting pipe, more sites are located on two sides of the middle of the inner part of the coupling pipe diameter smaller than the diameter of 2-3 mm, which are press fits create tightness and the locking effect.