dear brothers,

i need calculation technique for MAWP for girth flange. i cannot find calculations in asme viii div1 app.2 .

kindly help.

regards,

m.kasi

_________________
Regards,

M.KASI

ASME Code does not provide formulas for MAWP of the App 2 flange. Instead of providing a formula for required thickness the Code provides certain stress calculations that must be met, as well as flange bolting requirements and flange rigidity requirement.

The MAWP can be found as the largest pressure that the flange construction can sustain without any of the Code requirements exceeding its corresponding limit. In other words, keep increasing the pressure and checking all of the Code criteria; the pressure at which at least one of the calculated Code requirements equals its corresponding limiting value is the MAWP. Why? Because increasing the pressure just that one tiny bit more will result in an overstress condition, etc.

Conceptually this is simple, but in reality you have to perform many calculations for each "trial MAWP". If none of the Code calculations' criteria is met then you have to increase the pressure and repeat.

dear tom,

thank you so much.

regards,
m.kasi

_________________
Regards,

M.KASI