Heat Transfer
For specified tube outside diameter, higher BWG means higher

none of the listed here
weight per unit length
cross-sectional area
tube thickness

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Heat Transfer
In sub-cooled boiling,

Very large vapour space is necessary
Temperature of the heating surface is less than the boiling point of the liquid
Temperature of the heating surface is more than the boiling point of the liquid
Bubbles from heating surface are absorbed by the mass of the liquid

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