Typical cylindricity of shells made by plate rolling

[BasakAbhishek]

Hello,
What is the typical expected cylindricity (on the ID) of a shell prepared by rolling a plate? UG-80 only talks about the difference between the maximum and minimum inside diameters at any cross section. It doesn't talk about the cylindricity. Any idea?
Abhishek

 

[mfgenggear]

OP
What size diameter, material, wall thickness
What tolerance required. It varies.

Basic rolling .020-..040 , using a pie tape for measuring for oversized diameter.
But heavy sch 40 or 80 can be brake formed.
After rolling , Depending on diameter can then be swaged afterwards.
To a more precise dia. Smaller diameter can be
Pulled thru a draw die. With in .001 inch.

 

[BasakAbhishek]

ID: 1750mm,t=25mm,matl: Hastelloy-C

 

[mfgenggear]

Yeppers tough but can be done.
The shop orsub contractor will have to have
Exotic high temperature alloys experience.

Because of the nature of the beast it will require
Solution annealed condition . Their equipment
Will require size and cability to roll form that size.
But it can be done.
Send out a draft for quote, and a red pen and work with concurrent supplier engineers for concurrent engineering.

 

[r6155]

Roll the cylinder once the head is in the shop.