Process Equipment and Plant Design
The most common standard size of bubble caps used in industrial operation is

4" dia cap with 8" dia riser
1" dia cap with 0.5" dia riser
6" dia cap with 4" dia riser
8" dia cap with 1" dia riser

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Process Equipment and Plant Design
A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the

Corner torus section and central dished section
Central dished section and corner torus section
Central dished section and straight flange section
Straight flange section and corner torus section

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