My question is how is the WOG rating determined? It does not seem to follow ASME B16.34 - I realise that the flanges are the limiting factor, but we have the same valve with socket weld ends. Higher rated flanges from the manufacturer are not an option for this valve. I need to find out if...
Hi,
Does anybody know of a definitive standard or method for calculating the thickness of a WOG rated ball valve? I have purchased ASME B16.34 which seems to only give class ratings and associated thicknesses, but it does not cover WOG.
I have a 1000 WOG valve with ANSI 150 flanged ends and...
I understand what you are saying gerhardl, but I still need to be able to calculate the normal torque to which I can apply a safety factor.
My question is still, how do you calculate the expected torque in order to correctly size the stem when designing from scratch?
Thanks for the replies.
The ball valve would be floating as it is in the size range up to 2". The posts indicated seem to show torque values for existing ball valves from different manufacturers. I am trying to determine how the stem is sized when starting with a blank sheet. My experience as...
Hi,
Does anyone know of a calculation or 'rule of thumb' process for determining the breakaway torque of a ball valve? I am designing a class 1500 ball valve from scratch and am using ASME B16.34 2009 for body bolts, wall thickness and general design, but there seems to be nothing on stem...
Hi,
I am new to this forum - not so new to engineering though.
Are UNF threads acceptable for bolted body joints on ball valves per ASME B16.34? I note that some other standards state that coarse threads be used, but sometimes when running calculations per para 6.4.2 (a), just going to fine...
