safety relief valve reaction force

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pancevo
Beiträge: 9
Registriert: Di 24. Mär 2015, 11:58

safety relief valve reaction force

Beitrag von pancevo »

Hello,

how to include safety relief valve reaction force in calculation (static calculation)?

I have following load cases:

1 - dead load
2 - normal operating
3 - design minimum
4 - design maximum
5 - pressure test

Thanks,

Regards
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rohr2support
Beiträge: 455
Registriert: Mi 14. Sep 2011, 08:23

Re: safety relief valve reaction force

Beitrag von rohr2support »

Hallo

Generally you can add an occasional load case "safety valve blowing".
In this load case you add the safety valve reaction forces.
If your safety valve blows into the open air, you just add it at the valve in the opposite of the blow direction.
If you have a long line from the safety valve onto the roof or into a silencer you may want to consider the dynamic
loads of the pressure wave traveling from the valve to the exhaust.

Here is an example with 2 rupture disks and a safety-valve.
sv_reaction.PNG
Best regards

Rohr2 Support
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pancevo
Beiträge: 9
Registriert: Di 24. Mär 2015, 11:58

Re: safety relief valve reaction force

Beitrag von pancevo »

Thanks for quick support.

I have further question:

In Rohr2 tasks when I define load case "safety valve blowing" what load case should I use as Associated reference load case?
SRV Blowing.png


Thanks in advance
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rohr2admin
Administrator
Beiträge: 631
Registriert: Di 13. Sep 2011, 14:03

Re: safety relief valve reaction force

Beitrag von rohr2admin »

Hello,

as in this load case only your reaction forces will act, the reference load case only has an influence on the Y-modulus, which will be determined at operating temperature. So the operating load case should be fine.

Best regards,
ROHR2support
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