Dear Amjad
I believe it means "Seal welding is not required for instrument devices located downsteam seal welded block valves which require frequent disasembly"
Khaled Mahmoud
Jeddah Refinery
--- Syed Amjad Ahmed <rsaahmed@yahoo.com> wrote:
> Gentlemen
> Lets say that,for a particular Pipe Spec,Threaded
> connection is not allowed. However, there is a
> clause
> saying that threaded connections can be used for
> "instruments", with higher class like CL 3000.
> How should we understand/interpret this?
> Could you please explain this in detail..
>
> Thanks.
> Amjad
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