Ductile piping is in accordance with the model described in the standard ISO 9001. Every pipe is internal pressure tested.

 
Compliance with International ISO

Specifications	International ISO
General technical specifications for ductile iron pressure pipes	2531
Socket pipes	2531
Flanged pipes	2531
Socket fittings	2531
Flanged fittings	2531
Flanged dimensions: rotatable & fixed	2531
Joint gaskets	4633
Pipe zinc coating	8179
Polyethylene sleeving	8180
Cement mortar pipe lining	4179
Model for quality assurance in design / development and production	9001