Posted by: Love_stress
Bellow with Caesar II - 09/18/11 11:52 AM
I have many lines that using the rubber expansion joint. The purpose is to absorb the vibration from the equipment.
Is it neccessary for line using rubber bellow need to run caesar?
Line condition as follow:
Diameter = 6 inch, 4 inch
Max temperature = 70 degree c
Max pressure = 2 barg
Fliuid = water
Thanks for your valuable help.
Posted by: danb
Re: Bellow with Caesar II - 09/18/11 12:45 PM
Probably yes since are on lines connected to rotating equipments.
But read your Piping Stress Specification. Should be written in there.
Regards,
Posted by: Love_stress
Re: Bellow with Caesar II - 09/18/11 01:04 PM
Thank Danb for prompt reply.
But it's not rotating equipment, just unloading equipment. And no any written in pipe stress spec.
How should I decide?
Posted by: danb
Re: Bellow with Caesar II - 09/18/11 06:18 PM
If:
- you have tied bellows;
- equipment do not have low allowable nozzle loads;
- you have enough experience in supporting lines;
you do not have to worry about.
If you have untied belows, make sure equipment vendor know that you are going to transfer pressure thrust on the equipment, place an anchor on the other side of the bellow.
If you are not sure on the results, perform a calculation at least on the most critical one.
Regards,
Posted by: danb
Re: Bellow with Caesar II - 09/18/11 06:28 PM
http://www.bssindustrial.co.uk/uploads/docs/304.pdfthe interesting thing about this vendor is that clearly specify on each type of bellows:
"These bellows require suitable anchors".
or
"These bellows do not require anchors."
Regards,