Process Equipment and Plant Design
Wind load consideration in the design of a support can be neglected, when the vessel is

Tall but empty
Short (< 2 m) and housed indoor
Tall (say 30 metres), but is full of liquid
None of these

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Process Equipment and Plant Design
Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than __________ of the head.

6% of I.D.
Either A or B, whichever is larger
3 times the thickness
Either A or B, whichever is smaller

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