Ductile iron pipe Each pipe interface must undergo a sealed test to ensure that the plastic or ductileon tube in the operation of the time, plus a certain amount of pressure standards, but also to seal it.

Then the interplanetary ductile iron pipe in the docking after the largest gap should be between five to five percent, so that the surface can be machined on the surface, so that customers can meet the wall thickness required in the socket interface for sealing test When the socket part of the cut to more than 2 times the diameter of the ball tube, the design of the wall thickness should be zero to 10 percent, to meet customer requirements of the wall thickness. Meet the provisions of ISO10804-1.