R Stamp or Is enough U stamp?

[Resegone]

Good morning all,

Today i have a query about U Stamp and R stamp.

I have two equipment both of them are U stamped made by two differenti manufacturer, after the hydrotest and u stamped i have tò cut both of them and weld each other with a circumferential Joint.
This operation will be done on a differenti workshop.

For my point of view this Is an alteration and r stamp Is reauired

 

[FatihAy]

I know that after the manufacturing is completed and the U stamp is made, an R stamp is required for every welding operation.

 

[Trestala]

You should decide who will be the Manufacturer responsible for the completed pressure vessel then they will be the one responsible for getting the final vessel stamped.

See UG-120(c) for partial data reports.

Those parts/components by the different manufacturer can do a partial data report and partial U-stamp.
Once those parts are combined/welded, the final U-Stamp to be done by that manufacturer who completed the equipment.

 

[Resegone]

Unfortunatly Is not a partial data report.

They tested and stamped every single part, i ve already considered your explanation but Is not my case.

Thanks

 

[weldstan]

Talk to your AI and AIA representatives and explain why this was done regarding the different manufacturers and the need to join them together.