bolt load

[212197]

Dear Experts,

I have to calculate bolt load of heat exchanger having 3 gaskets.
1 gasket between shell flange & tubesheet & other 2 are in between channel flange & tubesheet.

pl. see the attached detail indicating flange tubesheet configuartion & gaskets.

for circular gasket wm2 = 3.14*b*G*y
gasket has pass partition ribs.

1)While calculating bolt load as per appendix 2 of ASME sec VIII Div1, how to claulate wm2 for gasket having pass partition ribs?
2)whether for calculating total bolt load, Wm2 calculated for all 3 gaskets are to be added?

 

[212197]

It is to avoid major problems in case of leakage.
If innermost gasket fails, outer gasket will have to take care of leakage.

 

[SnTMan]

212197, do you have some vent or tell tale between the gaskets? How do you know if inner is leaking?

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[balamurugan02]

212197, Did you consult an RPE regarding this approach? or is there any proven design that you can share with us? it'll be much appreciated