Reduction of thickness of a cylinder formed from plate

[ElCidCampeador]

Hello,

I want to know the reduction of thickness of a cylinder formed from plate (low carbon steel): is there a way (or formula)?
I have a plate which shall respect a M.A.F. thickness after being rolled...Is there a way to demonstrate it (before working, without measuring it after)? ASME VIII Div.1 Ed.'19 Table UG-79-1 suggests a formula for forming strain calculation, but now? Could it be useful for my calculation?

Thank you

 

[r6155]

@ SnTMan
I said Appendix 1 1-2 CYLINDRICAL SHELLS (a)(1) ...... The following equations may be used in lieu of those given in
UG-27(c):
t= R(exp(P/SE)-1)

Regards

 

[SnTMan]

OK, again, confirm applicability. Thick shell formula

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[DriveMeNuts]

These equations provide a way of calulating the minimum thickness "after forming".
They don't predict loss of thickness "during forming".

 

[r6155]

@ SnTMan
ASME VIII Div 1 Appendix 1 1-2 CYLINDRICAL SHELLS (a)(1) is clear, ASME confirms it.
Is the same formula as in Div. 2

Regards

 

[SnTMan]

r6155, in 2017 Ed conditions of applicability are very clear. UG-27(c)(1) Eqn 1 shall apply unless t > 1/2 Ri or P > 0.385SE. The OP's cylinder does not appear to exceed these limits. No basis to invoke Div 2.[pre][/pre]

Perhaps different in 2019 Ed?

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[r6155]

@ SnTMan
1-2 CYLINDRICAL SHELLS
(a) Circumferential Stress (Longitudinal Joints). When
the thickness of the cylindrical shell under internal design
pressure exceeds one‐half of the inside radius, or when P
exceeds 0.385SE, the following equations shall apply. The
following equations may be used in lieu of those given in
UG-27(c):

2017 and 2019 ed. are equals
This equation give us a little less thickness and we can use in lieu of those given in UG-27.

Regards

 

[SnTMan]

When the thickness of the cylindrical shell under internal design
pressure exceeds one‐half of the inside radius, or when P
exceeds 0.385SE, the following equations shall apply.

I am unconvinced this eqn can be applied. 24mm << 914/2mm, but...

I don't intend to pursue it further

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[goutam_freelance]

As per UG-16 (c) 0.25 mm under-tolerance is allowed in plates. Over and above this around 1.5 factor of safety is available over the yield stress as per code. So if you specify 'min 24 mm thickness' and use NDT like UT while purchasing you need not worry.