The Lancashire boiler (Figure 1) was popular in palm oil mills in the 1960s. This is a single fire tube boiler with the fumace at one end. The hot flue gases will heat the water surrounding the tube and come out of the tube and heat up the bank of super heater tubes before steaming on to the range. This boiler can take widely fluctuating steam loads as is the case in palm oil mills. The boiler is also very reliable and is rugged.