Pressure on WOG rating
Pressure on WOG rating
(OP)
Hello, All,
Anyone know if a 1" ball valve with pressure in 3000# WOG rating means the same as 1" ball valve in ANSI Class3000LB?
What is the different between WOG rating and ANSI Class rating?
Thanks.
Anyone know if a 1" ball valve with pressure in 3000# WOG rating means the same as 1" ball valve in ANSI Class3000LB?
What is the different between WOG rating and ANSI Class rating?
Thanks.





RE: Pressure on WOG rating
Don't forget to use the forum search feature. See if any of these give you what you are looking for.
thread408-114317
thread292-77959
thread408-66243
thread378-41856
thread408-27676
RE: Pressure on WOG rating
However 3000WOG is a do-not-exceed pressure, at normal ambient.
RE: Pressure on WOG rating
So there is no equivalent between WOG rating and ANSI Class rating. So if the maximum working pressure is 3000# WOG, what pressure for the ball valve should I choose?
Thanks.
RE: Pressure on WOG rating
If that's what you mean, then you need to choose a valve with pressure rating of at least 3000 psi at your design pressure.
Valve pressure ratings varies with temperature and material of construction even for the same Class. For example, a ANSI Class 1500 carbon steel valve (material group 1.1 per ASME B16.34) has a pressure rating of 3705 psi at 100 F(pressure rating of this same valve drops to 2995 psi at 500 F), while a 316L Stainless steel (material group 2.3) valve of the same Class 1500 will have a pressure rating of only 3000 psi at 100 F (1910 psi at 500 F).
You should check ASME B16.34 for pressure rating of the valve material you want to use.