Heat Emission from Pipes Submerged in Water

Heat transmission from steam or water heating pipes submerged in water. Heat transfer rate for assisted (forced) and natural circulation

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Heat emission from steam or water pipes submerged in water are indicated in the tables below:

Temperature Difference between the Steam/Water in the Pipe and the Surrounding Water		Heat Transfer Rate to the Surrounding Water
(^oF)	(^oC)	(Btu/ft² h ^oF)	(W/m^2oC)
50	28	100 - 225	570 - 1280
100	56	175 - 300	1000 - 1700
200	111	225 - 475	1300 - 2700

For practical applications - the heat transfer rates can roughly be set to:

Type of Application	Heat Transfer Rate to the Surrounding Water
Type of Application	(Btu/ft² h ^oF)	(W/m^2oC)
Low pressure tank coils with natural circulation	100	570
High pressure tank coils with natural circulation	200	1100
Low pressure tank coils with forced circulation	200	1100
High pressure tank coils with forced circulation	300	1700

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