Fire-tube boilers sometimes have water-tubes as well , to increase the heating surface. A Cornish boiler may have several water-tubes across the diameter of the flue (this is common in steam launches). A locomotive boiler with a wide firebox may have arch tubes or thermic syphons. These increase the heating surface and give additional support to the brick arch.
Not all shell boilers raise steam ; some are designed specifically for heating pressurized water.
No comments:
Post a Comment