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[MW:34929] ASME SEC VIII Div1- UG-36 & UG-42 Nozzles RF pad requirements & mulitiple Nozzles opening

By Materials & Welding

Dear all,
Kindly refer to the attached images of the 
2 instrument air vessels.
one vessel 6" nozzles with reinforcement pad and other one same 6" nozzles without RF pad. Top head diameter, design pressure, head thickness , nozzle to head weld is internal portrusion with back side welding also same

From UG-36 above 10mm thickness only 2.3/8" ID nozzles can fabricate with out reinforcement pad.

Queries:
1. 6" nozzles required RF pad or not? With details explain 
2. 6" nozzles in-between 2" nozzles with maintain 500mm centre to distance - min distance requirements.


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