The Lancashire boiler is a boiler of stationary circulation, of fire, internal, horizontal and natural. Lancashire boilers are reliable and bear the load. They are economic within their operational capacity. However, they are bulky and at first increase the steam very slowly. The working pressure in lancashire boilers is in the range of 0.7 MPa to 2 MPa and the efficiency of the boiler is about 65% -70%. The size of these boilers depends on the size of the shell, which can be 2 m to 3 m in diameter and 6 m to 10 m in length.