NIULPE Class 1 case studies
NIULPE Class 1 · Put your knowledge to work in context.
The NIULPE Class 1 Engineer certification is the highest-grade credential in the National Institute for Uniform Licensing of Power Engineers' licensing ladder, aimed at chief engineers and senior operators responsible for the safe, efficient, and compliant operation of high-pressure steam plants, central power stations, and large industrial boiler installations. It is intended for engineers who already hold lower-grade licenses and are ready to demonstrate mastery across the full plant rather than a single system. The NIULPE Class 1 case studies are 5 cases and about 2,716 words.
1Low-Load CO Excursion on a Gas-Fired D-Type Boiler
A 150,000 lb/h, 600 psig D-type packaged boiler fires natural gas through a parallel-positioning burner with separate forced-draft and fuel-control valves. The unit carries plant load between 20% and 85%.
566 words, about 3 min2Feed Pump Cavitation After a Deaerator Temperature Excursion
A 250,000 lb/h feedwater system draws from a 15 psig deaerator whose storage tank water level is 22 ft above the centerline of two 100% centrifugal feed pumps. Each pump is rated 1,200 gpm at 1,050 ft head and 3,600 rpm, with a required NPSH of 16 ft at rated flow.
572 words, about 3 min3Thrust Bearing Distress on an Extraction Steam Turbine
A 35 MW condensing-extraction steam turbine is rated 900 psig, 900°F at the throttle and exhausts at 2.5 in Hg absolute. It supplies 180,000 lb/h extraction to a feedwater heater at 140 psig.
527 words, about 3 min4Condenser Tube Leak With the Condensate Polisher Out of Service
A 1,200 psig, 850,000 lb/h HRSG supplies steam to a turbine with a condenser using 90/10 CuNi tubes. The water treatment is all-volatile treatment with ammonia and hydrazine.
540 words, about 3 min5Safety Valve Gagging and Capacity Shortfall on a 600 psig Drum
A 600 psig, 150,000 lb/h steam drum is protected by two spring-loaded safety valves. The nameplate MAWP is 675 psig.
511 words, about 3 min