Re: Gate valve position

Mohd Yusof Ab Rahman wrote:

> Hai there, I am just wondering if there is any codes agains intalling
> block valve, i.e gate valve in 45° vertically inclined position. Some
> say it's difficult to remove and reinstall but then I believe fo small
> valves up to 10" or 12" there shouldn't be any problem?!!

I don't see why this would be a maintenance problem (if I understand the question correctly - it's worded confusingly).

Operations and Maintenance always have ways to get around design mistakes and oversights - one example might be the expected travel of a gate valve handwheel when fully open.

Plant/piping designers will allow for the travel but often forget that there is often additional overhead space required for the removal of the valve innards through the bonnet (if that is possible).

A similar phenomenon happens when an inexperienced person wants to perform a hot tap as a solution. The machine (plus operator access) take up much more space than might be expected.

Paul Received on Fri Mar 11 22:19:00 2005