A Boiler is a vessel or arrangement of vessels and interconnecting parts, in which steam or other vapour is generated, or water or other liquid is heated, at a pressure above atmospheric pressure, by fire, the products of combustion, electrical power or other similar method.
A boiler includes the valves, gauges, fittings, controls, boiler setting and any directly associated equipment, and ends at the first connection point after the first valve or valve assembly.
A boiler does not include:
For the purposes of part 5.2, 5.3, schedule 3 and schedule 4:
For schedules 3 and 4:
A Direct-fired process heater is an arrangement of tubes comprising 1 or more coils located in the radiant zone or convection zone, or both, of a combustion chamber, the primary purpose of which is to raise the temperature of a process fluid circulated through the coils, to allow distillation, fractionalism, reaction or other petrochemical process of the process fluid, whether that fluid is liquid or gas, or a combination of liquid and gas.
A Reciprocating steam engine is equipment driven by steam acting on a piston under pressure causing the piston to move and includes an expanding (steam) reciprocating engine.
A Turbine is equipment which is driven by steam acting on a turbine or rotor to cause a rotary motion.
Standard Boiler Operation
A High Risk Work Licence for this class of high risk work allows the holder to operate a boiler with a single fuel source that does not have a pre-heater, superheater or econimiser attached.
Note: a boiler is not taken to be capable of being fired by multiple fuel types simultaneously only because it changes fuel types during start sequences or is fired by different grades of the same fuel simultaneously.
Advanced Boiler Operation (BA)
A High Risk Work Licence for this class of high risk work allows the holder to operate a boiler including a standard boiler, which may have one or more of the following:
Turbine Operation (TO)
A High Risk Work Licence for this class of high risk work allows the holder to operate a turbine that has an output of 500kW or more and -
Reciprocating Steam Engine (ES)
A High Risk Work Licence for this class of high risk work allows the holder to operate a reciprocating steam engine where the diameter of any piston exceeds 250mm.