Prefered location of ball valve on vertical portion of pipe
Prefered location of ball valve on vertical portion of pipe
(OP)
Prefered location of ball valve on vertical portion of pipe? Why?
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Prefered location of ball valve on vertical portion of pipe
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Prefered location of ball valve on vertical portion of pipePrefered location of ball valve on vertical portion of pipe(OP)
Prefered location of ball valve on vertical portion of pipe? Why?
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RE: Prefered location of ball valve on vertical portion of pipe
Answer #1 - Place the valve at the bottom of the vertical portion.
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Answer #2 - Place the valve at the top of the vertical portion.
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Answer #3 - Put the valve at the place where the operator can reach it.
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Answer #4 - Ask the Process Engineer where the valve should be located
Sometimes its possible to do all the right things and still get bad results
RE: Prefered location of ball valve on vertical portion of pipe
RE: Prefered location of ball valve on vertical portion of pipe
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist
RE: Prefered location of ball valve on vertical portion of pipe
Ball valves don't normally sit vertically.
Give us a bit more please.....
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Prefered location of ball valve on vertical portion of pipe
Gas will always gravity-separate through a liquid column if given the opportunity. A shut valve on the vertical is creating a dead end that will foster condensation and gravity separation. Over time, even in a 3-phase line, if there is room you will have water on the bottom, condensate above that and gas above the condensate. This dead-leg is very quiet and very much subject to freezes. Like I said above, we see hundreds of broken valves and broken pipes each winter in the U.S. Rocky Mountains from vertical cross connects between tubing and casing lines on gas wellheads.
We also see solids like frac sand and coal fines collect in these dead legs if there is room. The key is to not allow space for very large accumulations.
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist
RE: Prefered location of ball valve on vertical portion of pipe
Trapped debris, particulate solids, condensed solids, or biologics) will be less squeezed into the sealing surface and rubbed across the disk-to-seat interface of a globe valve. Butterfly valve (bad) or ball valve (worst!) WILL rub every particle right across the sealing surface. Scratches and future leaks are near-certain much faster with a ball valve unless your system is "perfectly clean and condensate free"
RE: Prefered location of ball valve on vertical portion of pipe
I would put a very different priority of valve selection for vertical valves. You were looking at a single facet of the problem (scoring of the seat), but there are other considerations. From best to worst in my opinion (realize that I am limiting my consideration to block valves, not throttle valves, that are in a vertical run of pipe and that will normally be shut, and rarely operated--a frequently operated valve or a valve in throttle service would change the priority):
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist
RE: Prefered location of ball valve on vertical portion of pipe
As for Little incg - fluid is Hydrocarbonm and Client asked for some portion of pipe this position of valve...it is reachable, but requeast was to be vertical (ball or globe), but vertical...and I wonder why.
RE: Prefered location of ball valve on vertical portion of pipe
I don't know - why don't you ask him or her?
without seeing the piping configuration or why they think this is a good idea it is difficult to argue the case. I can only assume you means trunnion mounted ball valves - floating balls may not seal well under low DP if the pressure comes from vertically up.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Prefered location of ball valve on vertical portion of pipe
Thank you ones mnore to you and the guys.
RE: Prefered location of ball valve on vertical portion of pipe