May 22, 2017
The emergence of ductile iron pipe supply provides a good performance of the new pipe. In order to better use the ductile iron pipe in the project, the design and construction personnel should be familiar with the characteristics of ductile iron pipe fitting, continue to find the problem and be resolved.
1.Ductile iron pipe inside and outside surface must be smooth, do not allow cracks, cold and other obstacles, for all wall thickness thinning of the local defects, but its depth shall not exceed (2 +0.05 T) mm, T is pipe wall thickness.
2.Ductile iron pipe flanges spare contour must be clear, not allowed to affect the use of casting defects.
3.If the user agrees, local defects that does not affect the use can be repaired, but the repaired pipe must be re-water pressure or air tightness test.