Oil heater for marine boiler China Deyuan Marine Fitting Co.,ltd . Pin-tube oil heater consists of an outer shell and an ... heating of different oils, for example, boiler oil, diesel fuel-oil, lubricating oil, fuel oil in purifier, oil in oil storage tank etc., so that it ... heat transferring, small cubage, light weight etc. when the oil pass the pin-tube heat-transferring surface, a turbulence will ...