Thanks Obtrurator for giving clarity on the subject.
I was reviewing choke valve drawing for the same project. I noticed that manufacturer is providing full weld overlay of body bonnet including trims. My question is that why he is doing full weldoverlay for body and bonnet why not only trims...
We are procuring ball valv manufacturer is applying 625 over lay on seats and trims. For sour and corrosive service why normally we go for trim and seats overlay. Why we do not consider overlay on other wet areas other than trims like body bonnet internal walls.