LNG technical knowledge library
Explore the LNG plant by system, equipment and engineering topic.
LNG University publishes structured technical coverage so learners can see the subjects behind the learning paths before enrollment—from PFDs and P&IDs to compressors, cryogenic pumps, ESDVs, BDVs, PSVs, storage, BOG, vaporization and liquefaction.
These pages describe LNG technical knowledge coverage. They do not imply that every topic is a separate certification or standalone course. Program availability, assessment rules and credential outcomes are defined by the applicable published learning path.
Technical area
LNG Fundamentals
Technical area
Engineering Drawings
Process Flow Diagrams (PFDs) for LNG Facilities
Learn to read an LNG process at system level by following major equipment, streams, operating conditions and material or energy flows on a PFD.
Explore technical scopePiping & Instrumentation Diagrams (P&IDs)
Develop the ability to read the detailed relationship among process piping, valves, instruments, equipment, control loops and safeguards on LNG P&IDs.
Explore technical scopeTechnical area
Rotating Equipment
Centrifugal Compressors in LNG Service
Understand the operating principles, performance limits, major components, auxiliaries and protection philosophy of centrifugal compressors used in LNG and gas-processing facilities.
Explore technical scopeBoil-Off Gas (BOG) Compressors
Study the role of BOG compressors in controlling LNG tank and transfer-system vapor generation while maintaining a stable vapor-handling path.
Explore technical scopeCryogenic In-Tank Pumps
Study submerged LNG pumps, pump columns, motor arrangement, hydraulic behavior and the operating considerations that arise from cryogenic service.
Explore technical scopeLNG High-Pressure Sendout Pumps
Understand how high-pressure LNG pumps raise liquid pressure before vaporization and how their hydraulic operating envelope connects storage, recondenser and vaporizer systems.
Explore technical scopeDry Gas Seals for Centrifugal Compressors
Study the purpose, arrangement and monitoring of dry gas seals used to limit process-gas leakage from centrifugal compressors.
Explore technical scopeCompressor Performance Monitoring
Understand how operators and engineers use pressure, temperature, flow, vibration and map position to evaluate centrifugal-compressor performance and degradation.
Explore technical scopeTechnical area
Controls & Protection
Compressor Anti-Surge Control
Understand why surge is damaging, how an anti-surge controller protects the compressor and why recycle-valve response, instrumentation quality and operating margin matter.
Explore technical scopeDCS, SIS and Emergency Shutdown Systems
Understand the different roles of the distributed control system, safety instrumented system and emergency shutdown functions in an LNG facility.
Explore technical scopeTechnical area
Valves & Protection
Pressure Safety Valves (PSVs)
Understand the purpose, terminology and process-safety role of pressure safety valves protecting LNG equipment and piping against credible overpressure scenarios.
Explore technical scopeEmergency Shutdown Valves (ESDVs)
Learn how ESDVs isolate inventories or process sections during defined shutdown scenarios and how valve fail position, actuator design and shutdown logic fit into the protective architecture.
Explore technical scopeBlowdown Valves (BDVs) and Depressurization
Understand how BDVs support controlled depressurization of process inventories during shutdown or emergency scenarios and why blowdown capacity, destination and timing are engineering decisions.
Explore technical scopeCryogenic Valves, Materials and Low-Temperature Design
Understand how cryogenic temperature affects valve construction, materials, stem arrangements, sealing, thermal contraction and isolation strategy in LNG service.
Explore technical scopeTechnical area
Instrumentation & Control
Technical area
Safety Systems
Fire & Gas Detection Systems in LNG Facilities
Study the detection and response architecture used to identify flammable gas, fire or cryogenic release hazards and initiate alarms or protective actions.
Explore technical scopeFlare, Vent and Safe Disposal Systems
Study how relief, depressurization and vent streams are collected and routed to controlled disposal systems during normal, upset and emergency conditions.
Explore technical scopeLNG Spills, Vapor Dispersion and Thermal Hazards
Understand the physical behavior of released LNG, vapor cloud formation, dispersion influences and the principles behind spill containment and emergency planning.
Explore technical scopeProcess Hazard Analysis: HAZOP and LOPA Concepts
Understand how structured process-hazard studies identify deviations, causes, consequences, safeguards and risk-reduction needs in LNG facilities.
Explore technical scopeTechnical area
Storage
LNG Storage Tanks and Tank Systems
Understand the major systems around LNG storage tanks, including containment, insulation, instrumentation, pressure management, pump columns and safeguards.
Explore technical scopeLNG Stratification and Rollover
Study how LNG layers with different density and composition can form, evolve and potentially mix rapidly, producing increased boil-off gas generation.
Explore technical scopeLNG Tank Instrumentation and Inventory Measurement
Understand the level, temperature, pressure and density-related measurements used to monitor LNG tank inventory and thermal condition.
Explore technical scopeTechnical area
Process Systems
Boil-Off Gas Management
Understand the sources, collection, compression, recovery and disposition of BOG across storage, unloading, loading and regasification operations.
Explore technical scopeNitrogen and Inert Gas Systems
Understand the use of nitrogen for purging, inerting, padding and maintenance support across LNG facilities.
Explore technical scopeInstrument Air Systems
Understand how clean, dry compressed air supports control valves, shutdown valves and pneumatic instrumentation throughout an LNG facility.
Explore technical scopeFuel Gas Systems in LNG Facilities
Study how fuel gas is conditioned, pressure-controlled and distributed to fired equipment, vaporizers, turbines or other consumers.
Explore technical scopeLNG Commissioning, Purging and Cooldown
Study the staged preparation of LNG systems for hydrocarbon introduction, including cleanliness, leak testing, inerting, purging and controlled cooldown.
Explore technical scopeLNG Facility Startup and Shutdown Philosophy
Understand the system dependencies, sequencing and stabilization concepts that shape startup, normal shutdown and emergency shutdown of LNG facilities.
Explore technical scopeTechnical area
Regasification
LNG Recondenser Systems
Study how a recondenser uses subcooled LNG to absorb and condense BOG while supporting stable suction conditions for high-pressure sendout pumps.
Explore technical scopeLNG Regasification Process
Follow LNG from storage through pumping, BOG recovery, vaporization, metering and pipeline sendout.
Explore technical scopeOpen Rack Vaporizers (ORVs)
Understand how ORVs transfer heat from seawater to pressurized LNG, and how seawater flow, icing, materials and outlet temperature affect operation.
Explore technical scopeSubmerged Combustion Vaporizers (SCVs)
Study the operating principle of SCVs, where combustion heats a water bath that transfers heat to LNG flowing through submerged coils.
Explore technical scopeORV Seawater Intake and Circulation Systems
Study the seawater intake, screening, pumping and distribution systems that support open rack vaporizer operation.
Explore technical scopeTechnical area
Marine & Transfer
LNG Marine Loading Arms and Transfer Systems
Understand the mechanical, hydraulic and shutdown functions of LNG loading arms used for liquid and vapor transfer between terminal and vessel.
Explore technical scopeLNG Vapor Return Systems
Study how vapor is returned between ship and shore during LNG transfer to manage displacement vapor and pressure.
Explore technical scopeLNG Bunkering Operations
Understand the technical and operational framework for transferring LNG as marine fuel, including transfer modes, interfaces, vapor management and emergency coordination.
Explore technical scopeTechnical area
Marine & Commercial
Technical area
Liquefaction
LNG Liquefaction and Refrigeration Systems
Understand how refrigeration cycles progressively remove heat from treated natural gas until it becomes LNG, and how compressors, refrigerants and cryogenic heat exchangers interact.
Explore technical scopeMain Cryogenic Heat Exchanger (MCHE)
Study the role of the MCHE in cooling and liquefying treated natural gas through close thermal integration with one or more refrigerant circuits.
Explore technical scopeTechnical area
Feed Gas Treatment
Natural Gas Dehydration for LNG
Understand why water must be removed to very low levels before cryogenic liquefaction and how adsorption-based dehydration systems are operated and regenerated.
Explore technical scopeAcid Gas Removal in LNG Pretreatment
Study the removal of carbon dioxide and hydrogen sulfide from feed gas to meet LNG process specifications and protect cryogenic equipment.
Explore technical scopeContinue into structured learning
Move from technical exploration into an LNG learning path.
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