Dear tanmay/RS

Thank you for your response.

But that is not what i want.

My question is why B31.1 used allowable bending stress value as 15.86 MPa for calculated pipe support span at 400 C.

If you can refer, For CS material as per B31.1 allowable value is much much more than 15.86 Mpa.

Also why as per B31.1 sag limit is 2.5mm.
I want to know the basis.


Mr Dave Diehl / Mr. Richard Ay, Plz give your opinion on this.

Thanks .