This variety of serpentine coil more than all the others is intended to be inserted or drowned inside a casting standard. This kind of serpentine can be drowned in a stator of electric motor or even in the sleeve of a piston for special diesel engines. The tube selected to make the serpentine coil will be then often out of austenitic alloy. Special design for vacuum pumps.
Another exemple:evaporator in mini serpentine drowned in a foundry
The dimension of the exchangers has an amplitude going of low-size apparatuses for laboratories, with the exchangers for power stations out of tubes Ø 80 and certain aerogenerators.