LNG BOG Flare System for Safe Boil-Off Gas Management
LNG BOG Flare System for Safe Boil-Off Gas Management
Workers inspecting industrial equipment near large cranes at a shipping dock under a clear blue sky.
LNG BOG Flare System for Safe Boil-Off Gas Management
LNG BOG Flare System for Safe Boil-Off Gas Management
LNG BOG Flare System for Safe Boil-Off Gas Management
Workers inspecting industrial equipment near large cranes at a shipping dock under a clear blue sky.
LNG BOG Flare System for Safe Boil-Off Gas Management
FOB
Shipping:
Ocean freight
Product details
FAQ
Essential details
Shipping:Ocean freight
Product Introduction
Customized LNG Flare Solutions for Boil-Off Gas Handling

Zexuan provides customized LNG BOG flare systems designed for safe handling and combustion of boil-off gas generated during LNG storage, transportation and terminal operations.
As LNG is stored at cryogenic temperatures, heat ingress from the environment causes continuous vaporization of liquid natural gas, creating boil-off gas (BOG). Proper BOG management is essential to maintain tank pressure, ensure operational safety and prevent methane emissions.
Zexuan designs LNG flare systems including enclosed ground flares, elevated flares and skid-mounted flare packages according to terminal capacity, gas composition and project requirements.

What is LNG BOG?

Understanding LNG Boil-Off Gas

Boil-off gas (BOG) is vaporized natural gas generated when LNG absorbs heat during storage and transportation.
LNG is stored at approximately -162°C. Even with advanced insulation systems, a small amount of LNG evaporation occurs continuously.
If BOG is not properly managed, pressure inside LNG tanks may increase, creating safety risks. LNG flare systems provide a reliable solution by safely combusting excess methane gas during normal operation, startup, shutdown or emergency conditions.

Why LNG Facilities Need BOG Flare Systems

Safe Pressure Control

LNG storage tanks require effective pressure management. BOG flare systems provide a safe method to dispose of excess vapor when recovery systems cannot handle the generated gas.

  • LNG tank pressure control
  • BOG management

Methane Emission Reduction

Methane has a high global warming potential. Combustion of BOG converts methane into carbon dioxide and water, reducing direct methane emissions.

  • Methane flare system
  • LNG emission control

Emergency Protection

During abnormal operating conditions, LNG flare systems provide reliable emergency gas disposal to protect storage equipment and personnel.

LNG BOG Handling Methods

1. BOG Recovery System

BOG can be recovered through compressors and returned to the LNG process or used as fuel gas.

However, during peak conditions, startup, shutdown or emergency situations, additional flare capacity may be required.

2. LNG Flare System

LNG flare systems provide a safe combustion solution when BOG recovery capacity is insufficient or unavailable.

3. Re-liquefaction System

Some LNG facilities use re-liquefaction technology to convert BOG back into liquid LNG.

Flare systems remain an essential safety backup solution.

Zexuan LNG BOG Flare System Solutions

1. Enclosed Ground Flare System

Enclosed ground flares provide low radiation and low visible flame performance, making them suitable for LNG terminals located near populated areas.

  • LNG enclosed ground flare
2. Elevated Flare System
Elevated flare systems provide large capacity gas combustion solutions for LNG facilities requiring high flow emergency discharge capability.
3. Skid Mounted Flare System
Skid-mounted flare packages offer compact modular solutions for LNG bunkering, small terminals and temporary applications.

LNG BOG Flare System Components
  • Flare Tip
The flare tip is designed according to methane composition, flow rate, pressure and required combustion performance.
  • Ignition System
Reliable automatic ignition systems ensure safe startup and continuous flame monitoring.
  • Control System
PLC-based control systems monitor flare operation and provide automatic control functions.
  • Knockout Drum
Knockout drums remove entrained liquid droplets before gas enters the flare system, improving combustion safety.

Advantages of Zexuan LNG Flare System
  • Customized Engineering Design
Each LNG flare system is designed based on terminal capacity, BOG generation rate, gas composition and operating conditions.
  • Reliable Methane Combustion
Optimized flare design ensures stable combustion and efficient destruction of LNG vapor gas.
  • Multiple Configuration Options
Zexuan provides elevated flare, enclosed ground flare and skid-mounted flare solutions.
  • EPC Project Support
From engineering design to manufacturing and commissioning support, Zexuan assists EPC contractors and LNG operators worldwide.

Applications
  • LNG Receiving Terminal
BOG management during LNG unloading, storage and transfer operations.
  • LNG Storage Facility
Emergency pressure relief and vapor gas combustion.
  • LNG Bunkering Station
Safe handling of LNG vapor generated during marine fuel transfer.
  • LNG Satellite Station
Compact flare solutions for smaller LNG distribution facilities.

LNG BOG Flare System vs Traditional Flare
ItemLNG BOG Flare SystemGeneral Industrial Flare
Gas typeMethane-rich BOGVarious process gases
TemperatureCryogenic LNG vapor sourceNormal process gas
Main purposeBOG managementWaste gas combustion
ApplicationLNG facilitiesOil & gas, refinery

Design Considerations
  • BOG Generation Rate
BOG rate depends on LNG tank size, insulation performance, ambient temperature and operating conditions.
  • Gas Composition
LNG BOG mainly contains methane, but composition can vary depending on LNG source.
  • Flare Capacity
The flare system must be designed to handle maximum emergency BOG flow conditions.
  • Radiation Requirements
Radiation limits influence flare type selection and installation location.

Why Choose Zexuan for LNG BOG Flare System?

Zexuan provides complete LNG flare solutions for terminal operators and EPC contractors.
Our capabilities include:
  • LNG flare process design
  • BOG handling solutions
  • Flare package manufacturing
  • Enclosed ground flare fabrication
  • Skid-mounted flare integration
  • Control system configuration
  • Commissioning support
With experience in industrial flare projects, Zexuan helps customers achieve safe, reliable and environmentally responsible LNG operations.
WhatsApp