Albator
Industrial
- Feb 6, 2008
- 11
Hi all.
My question will certainly look like evident for some people.
I'm currently beginning design of subsea valves.
I read several standards, but there is something I can't fix about the class pressure.
What I retained is that the design has to follow a pressure class as any other valve design, and that "valves shall be designed for loads other than internal pressure and temperature if specified by the purchaser" (from API 6DSS).
So let's say I have process conditions giving a 600# class (150 bars), but that my valve is to be placed by -3000 meters (300 bars of external pressure).
How should I design it?
Like any other 600# valve, but adding thickness to resist to 300 bars of external pressure, modifying the seals, etc.?
Or like an API 5000 valve for example (345 bars internal)?
I really can't make the difference between those 2 options regarding the standards.
There is obviously something I didn't understand.
Please don't laugh of me ;-)
My question will certainly look like evident for some people.
I'm currently beginning design of subsea valves.
I read several standards, but there is something I can't fix about the class pressure.
What I retained is that the design has to follow a pressure class as any other valve design, and that "valves shall be designed for loads other than internal pressure and temperature if specified by the purchaser" (from API 6DSS).
So let's say I have process conditions giving a 600# class (150 bars), but that my valve is to be placed by -3000 meters (300 bars of external pressure).
How should I design it?
Like any other 600# valve, but adding thickness to resist to 300 bars of external pressure, modifying the seals, etc.?
Or like an API 5000 valve for example (345 bars internal)?
I really can't make the difference between those 2 options regarding the standards.
There is obviously something I didn't understand.
Please don't laugh of me ;-)