My response was in reference to others stating that they could not find direct replacements for parts and may have to modify the pipe size to make it fit possibly causing issues with surrounding equipment, cabling.Okay then, I guess none of the machinists, manufacturers or others working directly for DND, the shipyards, valve manufacturers and other heavy industries involved in this know what they are doing, so you should put in a bid.
I do not think that would be necessary because we have lots of shops around that can make valves to specs.
Funny, one post about a ship needing to get a local guy in the US to make a part for them to sail.