Dear all

Good Morning

I am also fresher in this Analysis Field but as i know and Studied,i am going to explain about Flange Leakage Analysis.

For hign PT rating like 600#, 900# , 1500# ....etc we do flange analysis.
Client will give details about for which PT # flange this analysis shall be perform.
In actual practice, any piping system has Internal Pressure & as well as Thermal loads also.
Here we have 2 methods to do analysis

1. Peq- Pressure Equivalent Methods
2. Detail Analysis

In Both methods the general differnce is that in Peq we convert Thermal Loads into pressure and then compare with PT rating of given Flange.

But in 2nd method we convert Axial loads & Bending Moments into Stress and Compare it with alloawble Stress.

Peq = 16*M/(3.14*G^3)+ 4*Fa/(3.14*G^2)
here-
G- Diameter at location of gasket load reaction
M- Bending Moment from pipe
Fa- Axial Force From pipe

Ptotal = P+Peq.........P = design internal pressure
After that compare this result with ASME B . 16.5 As per PT rating and given Temparature.

P total < Allowable ASME B 16.5

If flanges will fail so go for 2nd Detail analysis.
This method i will explain next day

I would like to say Mr. Richard that please give some comment on that TOPIC which Ensure me that i am moving in right way.

I personally don't like comparing Peq to the B16.5 data. B16.5 has absolutely nothing to do with leakage.

HI
Yes you are right we don't need to compare this with B 16.5 the allowable values will be show in your report.

Thanks.
Richard