A large tank of water is heated by natural convection from submerged horizontal steam pipes the pipes are 3-in schedule 40 steel. When the steam pressure is atmospheric and the water temperature is 80F what is the rate of heat transfer to the water in btu per hour per foot of pipe length.

A large tank of water is heated by natural convection from submerged horizonsa steam pipes. The pipes are 3-in. Schedule 40 steel. When the steam pressure is mospheric and the water temperature is 80F. what is the rate of heat transfer to the water in Btu per hour per foot of pipe length