I'm a piping designer with afew years of experience, I was doing a project where the engineer wanted to hot tap thur a 4" valve into a 6" line (this is hydrocarbon service). I normally like to use full port ball valves for this but the engineer indicated he want to use a gate valve to save money. I've run across this before so nothing new. As I was filling out the material requisition I had noted that we needed "full port" gate valves to do this hot tap. My boss saw this and said "ALL" gate valves are "full port" regardless, and didn't need to be indicated! ...News to me, But to be honest I really don't know! I've sent email to some major valve manufactures, but they ALL seems to be too busy to answer my question. Can ANYBODY help me here!!?? THX! ...Mark
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