Please see the following link for AWWA M41 for ductile iron pipes and fittings.

[link Point to another website Only the registered members can access]
Additional to this you can find the following on the internet

1- Catalouge for SADIP Saudi Arabia Ductile Iron Pipe.
2- Kubota Ductile Iron Pipeline Design Manual.
3- DIPRA Instllation Guide for Ductile Iron Pipe.
4- Ductile Iron Pipe Design US Pipe.


Greetings

Abo Khaled