Hi!
I'm a new caesar user & i've got a question about the flange size
in Caesar II I can not select flange type such as slip-on, welding neck etc. and weight of those flange type is not same isn't it?
can anybody help me out?

The "valve / flange" database in CAESAR II assumes weld neck flanges. If this is not what you have, you will have to either:

a) make the length and weight entries manually yourself

b) corect the values that CAESAR II puts on the spreadsheet.