High Risk Work Licence - Standard Boiler (BS) study guide
High Risk Work Licence - Standard Boiler (BS) · Work through your exam, one topic at a time.
The Standard Boiler (BS) licence is a high risk work credential for people who operate standard boilers - typically fire-tube or small water-tube units used for process steam or heating. It exists so that boiler operation is confined to people who can demonstrate competence in safe start-up, routine running, water level control, fuel and combustion management, water treatment, emergency response, and the legal duties that come with operating pressure equipment. The High Risk Work Licence - Standard Boiler (BS) study guide has 9 sections and about 2,231 words.
01Boiler Construction, Types and Terminology
A standard boiler licence candidate must be able to read a boiler like a diagram. Learn the pressure parts: shell or drum , furnace , tubes (firetube and watertube), tubeplates , stays , crown sheet and combustion chamber .
299 words, about 1 min02Boiler Fittings, Valves, Gauges and Safety Devices
Every standard boiler carries a statutory set of fittings. Learn the function, location and testing of: safety valves (usually two, one set lower), main steam stop valve , feedwater check and stop valves , blowdown valves , water level gauges (two independent), pressure gauge with siphon and cock, fusible plug (where required), low-water cutoff , high-steam-pressure limit , flame failure device and alarm systems .
280 words, about 1 min03Feedwater Systems, Pumps, Injectors and Water Level Control
Feedwater must overcome boiler pressure, so pump selection matters. Learn reciprocating , centrifugal and positive displacement pumps, injectors (steam jet), feedwater regulators (on-off, modulating, proportional) and economisers .
246 words, about 1 min04Combustion, Fuels, Burners and Draft Systems
Combustion requires fuel, oxygen, heat and mixing time . Learn stoichiometric (theoretical) air , excess air , air-fuel ratio , flue gas analysis , CO₂ , O₂ , CO and smoke number .
244 words, about 1 min05Boiler Water Chemistry, Treatment and Blowdown
Chemistry protects the boiler from scale , corrosion , caustic embrittlement , carryover and foaming . Learn hardness , alkalinity , pH , dissolved oxygen , total dissolved solids (TDS) , silica , chlorides , conductivity and suspended solids .
247 words, about 1 min06Start-up, Shutdown and Normal Operating Procedures
A safe start-up follows a sequence: pre-start checks , water level confirmation , safety valve and gauge checks , purge , light-off , warm-up , pressure raising , testing fittings , putting on line . Learn purge time and volume , warm-up rate , thermal stress , drum expansion , sliding feet and warming through connections.
239 words, about 1 min07Abnormal Conditions, Emergencies and Accident Prevention
Recognise abnormal conditions early: low water level , high water level , foaming and priming , carryover , caustic embrittlement , scale and overheating , tube failure , shell leakage , flame failure , furnace explosion , pump failure , power failure , safety valve failure and fire or fuel leak . Know the required response to low water : shut off fuel and air, do not feed water until the cause is known and the boiler is checked; if the crown sheet is uncovered, do not feed.
263 words, about 1 min08Inspection, Maintenance, Testing and Record Keeping
Statutory inspection includes internal inspection , external inspection , hydraulic test , accumulation test and safety valve testing . Learn the roles of the inspector , competent person , boiler attendant and owner .
217 words, about 1 min09Legislative and Duty-of-Care Responsibilities
Boiler operation sits within a work health and safety framework. Learn duty of care , primary duty , officer duty , worker duty , reasonably practicable , hierarchy of control , risk assessment , consultation , notification of incidents , licensing and competent person requirements.
196 words, under 1 min