Water bath heaters are indirect fired type usually designed to api 12k, these devices are traditionally used to heat natural gas and oil.
water bath heaters can also be used for heating:
* crude oil
* vaporizing and superheating lpg & lng
* regeneration gas heating
* heat transfer fluids
* heat sensitive gas and fluids
* molten salt heaters direct fired reboilers
* amine reboilers
* teg reboilers
Boronia, Australia 
