High Risk Work Licence - Standard Boiler (BS) case studies
High Risk Work Licence - Standard Boiler (BS) · Put your knowledge to work in context.
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) case studies are 5 cases and about 3,433 words.
1Low Water Cut-out With a Sticking Feedwater Regulator
You are the only licensed operator on shift at a food-processing plant running a 3-pass firetube standard boiler at 850 kPa. Steam demand is steady at about 70% of rated capacity.
711 words, about 4 min2Carry-over After a Change of Water Treatment Supplier
A 2-pass packaged boiler rated at 4000 kg/h supplies steam to a laundry. Six weeks ago the plant changed water treatment contractors.
711 words, about 4 min3Furnace Puff-Back on Light-Off After a Short Shutdown
A standard boiler burning natural gas through a forced-draught burner has been shut down for 40 minutes for a filter change on the fuel train. The burner management system has a pre-purge timer set to 30 seconds at high fire, a flame scanner, and a pilot proving period.
675 words, about 3 min4Safety Valve Chattering During Warm-Up
A standard boiler is being brought up from cold after a weekend shutdown. The safety valve is a direct-loaded spring type set at 1000 kPa, and the boiler normally runs at 850 kPa.
681 words, about 3 min5Inspection Interval Pressure After a Repair to the Shell
A standard boiler at a hospital has been in service for 18 years. During the last internal inspection a crack was found in a stay-tube weld and was repaired by a coded welder, with the repair documented and radiographed.
655 words, about 3 min