| B051 | BEM | Belt Efficiency Measurement | Evaluates efficiency of belt drives | Conveyor system performance |
| B052 | BEN | Bending | Deformation of a part under load | Beam bending in a press brake |
| B053 | BEO | Boiler Exhaust Outlet | Exit point for flue gases | Chimney in steam plant |
| B054 | BEP | Best Efficiency Point | Optimum pump operating condition | Centrifugal pump selection |
| B055 | BER | Boiler Evaporation Rate | Steam produced per unit time | Boiler capacity calculation |
| B056 | BES | Boiler External Structure | Outer frame of a boiler | Power plant boiler casing |
| B057 | BET | Boiler Evaporation Test | Measures steam generation rate | Efficiency testing |
| B058 | BEV | Battery Electric Vehicle | Runs solely on electric power | Tesla Model S |
| B059 | BF | Back Feed | Reverse power flow | Generator safety control |
| B060 | BFA | Boiler Feedwater Arrangement | Layout of feedwater piping | Power plant boiler design |
| B061 | BFB | Bubbling Fluidized Bed | Combustion chamber design | Biomass power plant |
| B062 | BFD | Block Flow Diagram | Simplified process flow chart | Chemical plant design |
| B063 | BFE | Boiler Feedwater Economizer | Preheats feedwater with flue gas heat | Fuel saving in boilers |
| B064 | BFF | Belt Filter Fabric | Fabric used in filtration belts | Paper mill dewatering |
| B065 | BFG | Blast Furnace Gas | Byproduct gas from steelmaking | Power generation fuel |
| B066 | BFI | Boiler Feedwater Inlet | Entry point of feedwater | Steam generation system |
| B067 | BFL | Boiler Feedwater Line | Pipe carrying feedwater | Thermal plant piping |
| B068 | BFM | Boiler Feedwater Meter | Measures feedwater flow | Power plant instrumentation |
| B069 | BFP | Boiler Feed Pump | Pumps feedwater to boiler | High-pressure boiler pump |
| B070 | BFS | Boiler Feedwater System | Complete feedwater handling unit | Steam plant water supply |
| B071 | BFT | Boiler Feedwater Tank | Storage tank for feedwater | Thermal plant accessory |
| B072 | BFW | Boiler Feed Water | Treated water for steam generation | Water treatment in power plants |
| B073 | BG | Bevel Gear | Gear with intersecting shafts | Differential gear in vehicles |
| B074 | BGA | Ball Grid Array | Packaging for electronic components | Microcontroller in CNC control |
| B075 | BGD | Boiler Gas Damper | Regulates flue gas flow | Boiler draft control |
| B076 | BGH | Boiler Gas Heater | Heats gas for process use | Gas-fired drying system |
| B077 | BGL | Boiler Gas Line | Piping for gas to boiler burners | Gas-fired steam boiler |
| B078 | BGM | Boiler Gas Meter | Measures fuel gas flow | Gas supply monitoring |
| B079 | BGR | Boiler Gas Recirculation | Reuses flue gases for efficiency | NOx reduction |
| B080 | BGS | Boiler Gas System | Gas supply and control in boilers | Thermal power plant |
| B081 | BGV | Boiler Gas Valve | Controls gas flow to burners | Industrial boiler valve |
| B082 | BH | Bore Hole | Drilled hole in material | Shaft for bearings |
| B083 | BHA | Boiler Header Assembly | Main steam/water header | Heat exchanger connections |
| B084 | BHB | Boiler Header Bend | Curved header section | Steam distribution piping |
| B085 | BHD | Bulkhead | Wall or partition in tanks/vessels | Ship compartment separation |
| B086 | BHF | Boiler Header Flange | Flanged connection on headers | Steam piping connections |
| B087 | BHL | Boiler Header Line | Piping from boiler header | Steam distribution network |
| B088 | BHM | Boiler Header Manifold | Distributes steam/water from boiler | Heat recovery systems |
| B089 | BHP | Brake Horsepower | Engine power output at crankshaft | Car engine power rating |
| B090 | BHS | Boiler Heating Surface | Area available for heat transfer | Efficiency calculation |
| B091 | BHT | Boiler Heat Transfer | Thermal energy exchange | Heat balance calculations |
| B092 | BHU | Boiler Heat Unit | Energy unit in boiler rating | Fuel heating value |
| B093 | BI | Boiler Inspection | Safety and condition check | Annual inspection report |
| B094 | BIA | Boiler Inspection Authority | Official inspection agency | Government safety board |
| B095 | BIB | Built-In Bypass | Internal bypass system in pumps | Pump overpressure protection |
| B096 | BID | Bidirectional | Works in both directions | Bidirectional hydraulic pump |
| B097 | BIF | Boiler Induced Fan | Pulls flue gases out | Induced draft fan |
| B098 | BIG | Boiler Ignition Gas | Startup fuel gas | Power plant startup |
| B099 | BIL | Basic Impulse Level | Electrical insulation rating | Transformer surge protection |
| B100 | BIM | Building Information Modeling | Digital representation of facilities | Mechanical plant 3D modeling |
| B101 | BIN | Binary | Base-2 numeric system | PLC programming |
| B102 | BIO | Biodegradable Oil | Environment-friendly lubricant | Hydraulic oil in eco-sensitive areas |
| B103 | BIP | Boiler Inspection Protocol | Inspection procedure document | Power plant safety compliance |
| B104 | BIS | Bureau of Indian Standards | Indian standards body | IS codes for engineering |
| B105 | BIT | Binary Digit | Smallest unit of digital data | CNC program data |
| B106 | BJ | Ball Joint | Spherical bearing connection | Car steering linkage |
| B107 | BK | Brinell Hardness | Hardness measurement method | Brinell test on steel |
| B108 | BKA | Boiler Kilocalorie Analysis | Fuel energy content check | Power plant fuel analysis |
| B109 | BKD | Backdraft Damper | Prevents reverse air flow | HVAC duct systems |
| B110 | BKL | Boiler Kilowatt Load | Electrical equivalent of boiler heat output | Energy management |
| B111 | BKN | Backing Nut | Nut that locks another nut in place | Double-nut arrangements |
| B112 | BKR | Breaker | Circuit protection device | Motor control center breaker |
| B113 | BKT | Bracket | Support for components | Wall-mounted pipe clamp |
| B114 | BL | Boiler Load | Steam demand on a boiler | Load variation monitoring |
| B115 | BLA | Boiler Load Allocation | Distribution of load among boilers | Multi-boiler plant |
| B116 | BLC | Boiler Load Control | Automatic load adjustment | Power plant load sharing |
| B117 | BLD | Boiler Load Demand | Required steam load | Process demand calculation |
| B118 | BLE | Boiler Load Efficiency | Load vs efficiency relation | Operational optimization |
| B119 | BLF | Boiler Load Factor | Ratio of average to max load | Efficiency analysis |
| B120 | BLG | Boiler Load Gauge | Indicates steam load | Control room instrumentation |
| B121 | BLH | Boiler Load History | Record of boiler load over time | Plant performance review |
| B122 | BLI | Boiler Load Indicator | Visual display of load | Analog gauge |
| B123 | BLK | Block | Solid piece of material | Engine cylinder block |
| B124 | BLL | Boiler Load Limit | Maximum permissible load | Safety system setting |
| B125 | BLM | Boiler Load Management | Supervisory control of boiler load | Distributed control systems |
| B126 | BLN | Boiler Line | Steam or water piping | Industrial steam distribution |
| B127 | BLO | Boiler Load Optimization | Method to improve boiler efficiency | Energy saving projects |
| B128 | BLP | Boiler Load Profile | Graph of load variation | Process monitoring |
| B129 | BLR | Boiler | Steam-generating vessel | Industrial boiler |
| B130 | BLS | Boiler Safety | Boiler operation safety systems | ASME code compliance |
| B131 | BLT | Boiler Test | Performance or safety test | Hydrostatic pressure test |
| B132 | BLU | Boiler Unit | Complete boiler plant | Industrial heating unit |
| B133 | BLV | Boiler Valve | Regulates boiler steam/water | Safety valve |
| B134 | BM | Bench Mark | Reference point in surveying | Machine foundation layout |
| B135 | BMA | Boiler Master Air | Controls air for combustion | Combustion optimization |
| B136 | BMC | Boiler Master Control | Supervises boiler operation | Power plant automation |
| B137 | BMD | Boiler Maintenance Department | Boiler repair and upkeep | Industrial plant organization |
| B138 | BMF | Boiler Master Fuel | Controls fuel flow | Combustion control loop |
| B139 | BMG | Boiler Master Gauge | Main steam pressure gauge | Boiler instrumentation |
| B140 | BMI | Body Mass Index | Weight-to-height ratio | Ergonomics in mechanical design |
| B141 | BMK | Boiler Mark | Identification marking | Manufacturer’s plate |
| B142 | BML | Boiler Main Line | Main steam line from boiler | Process steam supply |
| B143 | BMM | Boiler Maintenance Manual | Technical reference for upkeep | OEM boiler guide |
| B144 | BMN | Boiler Main Nozzle | Primary steam outlet | Industrial boiler nozzle |
| B145 | BMO | Boiler Main Outlet | Primary steam discharge point | Process steam distribution |
| B146 | BMP | Boiler Main Pump | Main water pump | Feedwater system |
| B147 | BMR | Boiler Main Relief | Primary safety relief valve | Overpressure protection |
| B148 | BMS | Boiler Monitoring System | Tracks boiler performance | SCADA integration |
| B149 | BMT | Boiler Main Turbine | Turbine powered by main steam | Marine propulsion |
| B150 | BMU | Boiler Main Unit | Core boiler assembly | Industrial heating plant |
| B151 | BMV | Boiler Main Valve | Main steam isolation valve | Power plant piping |
| B152 | BN | Bearing Number | Identification of bearing type/size | SKF 6204 ball bearing |
| B153 | BNA | Boiler Nozzle Assembly | Nozzle unit in boiler | Burner assembly |
| B154 | BNC | Bayonet Neill–Concelman Connector | Coaxial RF connector | Instrumentation signal cables |
| B155 | BND | Bend | Curved section in piping | Pipe bend fitting |
| B156 | BNF | Boiler Nozzle Flange | Flanged connection for nozzles | Burner connection flange |
| B157 | BNG | Boiler Nozzle Gasket | Sealing element for nozzles | Steam-tight joint |
| B158 | BNH | Boiler Nozzle Housing | Holds nozzle components | Burner mounting |
| B159 | BNL | Boiler Nozzle Line | Piping from nozzle | Steam distribution |
| B160 | BNM | Boiler Nozzle Mounting | Attachment point for nozzle | Burner installation |
| B161 | BNP | Boiler Nozzle Plate | Plate supporting nozzle | Burner support structure |
| B162 | BNR | Boiler Nozzle Ring | Surrounds nozzle opening | Heat distribution in combustion |
| B163 | BNS | Boiler Nozzle Support | Structural support for nozzle | Large industrial burners |
| B164 | BNT | Boiler Nozzle Tube | Tube for fuel/air injection | Combustion chamber |
| B165 | BNU | Boiler Nozzle Unit | Complete nozzle assembly | Oil burner equipment |
| B166 | BNZ | Boiler Nozzle Zone | Section around nozzle | Burner operation monitoring |
| B167 | BO | Blow Off | Release of steam/water | Boiler blow-off valve |
| B168 | BOC | British Oxygen Company | Supplier of industrial gases | Welding oxygen cylinders |
| B169 | BOD | Biochemical Oxygen Demand | Water pollution measurement | Cooling water treatment |
| B170 | BOF | Basic Oxygen Furnace | Steelmaking furnace | Integrated steel plant |
| B171 | BOG | Boil-Off Gas | Vaporized gas from cryogenic storage | LNG handling |
| B172 | BOI | Boiler Outlet Inlet | Connection between outlet and inlet circuits | Boiler interconnections |
| B173 | BOL | Boiler Outlet Line | Main steam exit pipe | Power generation piping |
| B174 | BOM | Bill of Materials | List of all parts in a product | Assembly planning |
| B175 | BON | Boiler Outlet Nozzle | Steam outlet point | Industrial boiler design |
| B176 | BOP | Balance of Plant | All components except the main unit | Power plant auxiliary systems |
| B177 | BOR | Boiler Outlet Relief | Safety device on outlet | Steam overpressure control |
| B178 | BOS | Basic Oxygen Steelmaking | Process to make steel | Converter shop operation |
| B179 | BOT | Build Operate Transfer | Project financing model | Infrastructure development |
| B180 | BOV | Blow-Off Valve | Releases pressure in boiler | Safety relief system |
| B181 | BP | Boiling Point | Temperature at which liquid boils | Water boiling at 100°C |
| B182 | BPA | Bisphenol A | Chemical in plastics | Epoxy resin coating |
| B183 | BPC | Boiler Pressure Control | Regulates boiler pressure | Pressure setpoint control |
| B184 | BPD | Barrels Per Day | Oil production rate | Refinery throughput |
| B185 | BPF | Boiler Pressure Factor | Ratio for efficiency calculation | Steam plant analysis |
| B186 | BPG | Boiler Pressure Gauge | Measures boiler pressure | Control room instrumentation |
| B187 | BPH | Boiler Pressure High | High-pressure alarm setpoint | Boiler safety system |
| B188 | BPI | Boiler Pressure Indicator | Displays pressure readings | Analog gauge |
| B189 | BPL | Boiler Pressure Low | Low-pressure alarm | Plant shutdown protection |
| B190 | BPM | Blades Per Minute | Rotational blade speed | Cooling fan speed |
| B191 | BPN | Boiler Pressure Normal | Normal operating pressure | Steady load operation |
| B192 | BPO | Boiler Pressure Outlet | Outlet pressure measurement | Turbine inlet pressure |
| B193 | BPR | Boiler Pressure Relief | Overpressure protection | Safety valve |
| B194 | BPS | Boiler Protection System | Prevents unsafe boiler operation | Emergency trip system |
| B195 | BPT | Boiler Pressure Test | Pressure vessel testing | Hydrostatic test |
| B196 | BPU | Boiler Pressure Unit | Unit of pressure for boiler operation | bar, MPa |
| B197 | BPV | Boiler Pressure Vessel | Main steam-containing vessel | ASME code design |
| B198 | BPW | Brake Power | Output power measured at shaft | Engine dynamometer testing |
| B199 | BPY | Boiler Pressure Yearly | Annual pressure monitoring | Safety compliance |
| B200 | BQ | Boiler Quality | Quality rating of boiler | ISO 9001 certified boiler |
