A specialized type of HRSG without boiler drums is the once-through steam generator.
2.
These early fireboxes formed a separate water space from the boiler drum and were connected by prominent external copper pipes.
3.
Ettingshall was the location for the manufacture of the 240 ton boiler drum with a length of 122 feet in 1965.
4.
Within the boiler house and between boilers 2 and 3, an escalator was erected which in several stages extended to the boiler drum level to assist with the movement of men and materials.