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sachin_rastogi_in
Power-User

Join Date: Jul 2008
Location: India
Posts: 111

Ball valve in refinery

10/11/2008 1:24 AM

For Cl 125FF we are using CL 300 threaded Ball valve.Why Cl. 150 threaded ball valve can not be used?

Commodity - drinking water

End connections - pipe(1.5") ,A53,S160,galvanised,threaded & coupled,FBW

Operating Pr = 60 psig

Operating Temp = 90 F

Corrosion allowance = 0.125"

Design P & Temp = 150 psig & 150 F

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Abdel Halim Galala
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Engineering Fields - Piping Design Engineering - New Member Egypt - Member - Member since 02/18/2007

Join Date: Feb 2007
Location: Cairo, Egypt
Posts: 1733
Good Answers: 248
#1

Re: Ball valve in refinery

10/12/2008 12:25 AM

I think in any refinery, the lowest class of valves threaded/socketwelded is class 800 not 300. And also, I think that classes 125#, 150#, 300#, ...etc. is specified for flanged connections. The class/rating of threaded/socket welding fittings is 2000# (to match pipe Sch. 40 & STD.), 3000# (for Sch. 80 & XS), 6000# (for Sch. XXS) and 9000# (for higher schedules).

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yesyen
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Popular Science - Evolution - New Member

Join Date: Jul 2006
Location: India-Chennai.
Posts: 722
Good Answers: 30
#2
In reply to #1

Re: Ball valve in refinery

10/12/2008 1:10 PM

Service: Drinking water, fine.

In refinery, within battery limit or out side?

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