Straigh face /flangeof dishends

Length of straight face:
As per the UW-13 (b)(3)&fig UW-13.1(d)
The min. length of the straight face shall not be less then 3th but need not exceed 38 mm.
Where
Nominal thickness of head th = 10.000 mm
Nominal thickness of shell ts = 10.000 mm
Min. length of the straight face 3th = 30.000 mm
Therefore provided straight face length = 50.000 mm

Thank you sir for your promt response . and help.

But as per your expalinaition UW-13 states that :

" In all cases shall be not less than 3y when th exceeds ts. Minimum length of skirt is 3th but need not exceed 11/2 in. (38 mm) except when necessary to provide required length of taper."

a) Does it means that the length of the SF should not be more than 38mm ( as the underline statement is confusing)

And the second thing is ,, as per statement

"When th is equal to or less than 1.25ts, length of skirt shall be sufficient for any required taper. "

b) does it means there is no upper limit on SF length?

c) im asking this question coz we are having a EIL project in which Th=12mm & Ts=10 and SF given on dish is 90 mm (2"1 dish "

Kindly help

It is not required to be larger than 38mm, except when length of taper demands it....

When the dimensions fall within this range, there is no need to consider taper...