... pin tube extended heat surface. It is used for heating of different oils, for example, boiler oil, diesel fuel-oil, lubricating oil, fuel oil ... doesn't exist; it can work in any rigor condition for a long time. 2. specifications and typical structures Whatever products ... flow 0.05m3/h~ 500 m3/h. the heating medium materials are steam below 2.5Mpa,high-temperature water, other heating medium materials.