LINEX-BOG – Boil-Off Gas Liquefiers/Subcoolers


about-engineering_03Cosmodyne’s shipboard ready and land-based systems automatically control boil-off gas generated from any storage tank containing LNG or other cryogenic liquids. The system works with tanks in most applications including pressurized tanks or those operated at atmospheric pressures.


Cosmodyne offers two boil-off gas options that utilize a simple nitrogen based refrigeration cycle. The first option sub-cools a stream of LNG that is passed through a client’s spray header to collapse pressure. The second option re-liquefies the boil-off gas and the resulting LNG stream returns to the client’s tank.

LINEX-BOG – Boil-Off Gas Liquefiers/Subcoolers


The LINEX line of liquefiers incorporate Cosmodyne’s nearly 50 years of experience in cryogenic design. The liquefier is based on a closed-loop nitrogen expansion cycle and comes shipped in the following distinct, pre-piped, pre-wired modules:

– nitrogen refrigeration skid with cold box and expander
– nitrogen recycle compressor with motor and cooler(s)

System requires a simple foundation, supply of low voltage power and cooling power.



Standard Equipment & Features

• Refrigerant cooling provided with friendly and safe nitrogen refrigerant
• All major components designed and manufactured in Cosmodyne’s shop
• Robust controls package for unattended operation


Options & Accessories

• Cooling Systems
• Seawater to freshwater exchanger



• On-site or in-factory operator training
• Installation and commissioning assistance
• Extended warranty package
• Service package
• Aftermarket spare parts support
• Aftermarket technical support



Cosmodyne is a world leader in the design and manufacture of cryogenic plants. Each Cosmodyne system is designed and built to rigorous standards of quality and workmanship from nearly a half-century of experience. From proposal to installation, our sales, engineering, manufacturing and field-service personnel continually demonstrate our commitment to customer satisfaction. And this commitment doesn’t end with delivery — our field-service staff is ready to serve you 24 hours a day, wherever you are. When you buy a Cosmodyne plant you can be sure you will receive a quality built and reliable plant.


All plants, regardless of destination, are built to the following minimum codes:

  • General: NFPA (National Fire Protection Association) 59A, Production, Storage and Handling of LNG
  • Applicable Pressure Vessels: ASME Pressure Vessel Code Section VIII, Division 1
  • Weld and Welders qualified per ASME Section IX Welding and Brazing Qualifications
  • Electrical systems: NFPA 70, NEC, and NEMA
  • Process Piping: ASME B31.3
  • Shell and Tube Process Gas Coolers: TEMA (Tubular Exchanger Manufacturers Association Standards), Class C


Additional code compliance available including: 49 CFR Part 193, Liquefied Natural Gas Facilities, CE/PED, CRN/CSA, GOST, MIL-SPEC, API and various marine certifications.

Prior to shipping, each module is tested for pressure, strength, tightness, and control functionality.


LINEX-BOG – Boil-Off Gas Liquefiers/Subcoolers



Cosmodyne offers a complete series of solutions that are sized for typical customer requirements and market situations. We can also economically tailor the systems to meet other capacity requirements in addition to standard sizes.