Ring Type Flange from Rolled Strip

[MHS1988]

Hello everyone,

I’m seeking clarification on a fabrication method for a ring-type flange with the following dimensions:

• I.D.: 1100 mm
• O.D.: 1250 mm
• Thickness: 135 mm (no hub)
• Material: A516-70

My fabricator plans to cut 75 mm-wide strips from a 140 mm-thick plate, then roll them into the ring. I’m concerned this approach orients the grain structure incorrectly. I believe the proper methods would be either:

1. Cutting 140 mm-wide strips from a 75 mm-thick plate and rolling them (so the flange axis aligns with the plate’s original surfaces), or
2. Cutting a full ring directly from the 140 mm-thick plate (avoiding rolling altogether).

The fabricator argues that ASME VIII-1, Appendix 2, Clause 2-2(d) only applies to flanges with hubs and claims their method saves material.

My questions:

1. Is rolling the strip in the fabricator's proposed direction technically acceptable despite the grain orientation concern?
2. If not, are there code provisions (beyond Appendix 2) or other references that explicitly address this?

I’d appreciate any insights or experiences you’ve had with similar scenarios. Thanks in advance!

 

[r6155]

How do you plan to weld the flange to the cylindrical shell?
Shell thickness and material?

 

[EdStainless]

If you simply wanted to cut the flange from plate you would use 140mm plate wouldn't you?
Isn't this the same orientation as his original solution?
But in this case the "LT" and "ST" very around the ring.
At least with his approach they will stay constant.
Is he cutting across the plate or along it?
Either way the "ST" is still the thickness.