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LNG, LPG, conventional energies

Technical expertise built up over 90 years of LNG and LPG projects

LNG presents challenges that few players truly master: 9% Ni steel at −163 °C, prestressed concrete under cryogenic loads, thermal cycle management, and non-destructive testing of welds in a controlled atmosphere. It is on these specific challenges that Entrepose Contracting has built its expertise through the delivery of tanks, operational terminals, and successful commissioning projects.

For LPG and hydrocarbons, the same high standards apply to other configurations: spheres, buried cylinders, and high-pressure storage facilities. We work on these structures using the same risk management methods, the same certification standards, and the same seamless integration of engineering, fabrication and construction.

LNG

Full containment" cryogenic tanks and terminal infrastructures

LNG is natural gas cooled to around −162°C to reduce its volume and facilitate storage and transportation. Key challenges include containment safety, controlling boil-off losses, asset resilience, and LNG terminal availability.

We master the entire design and construction chain for fully contained cryogenic tanks : 9% Ni steel inner vessel and prestressed concrete outer shell.

Our expertise

  • Full EPC cycle management: engineering, procurement, fabrication (Entrepose Industries), construction, testing, and commissioning
  • Compression station
  • Pumping station
  • Mastery of special welding processes, non-destructive testing (NDT), and concrete slipforming sequences
  • Energy performance optimisation and reduction of boil-off losses

LNG references

These projects demonstrate strong expertise in delivering large-capacity cryogenic assets in complex environments.

LPG

High-pressure storage - spheres & cigars, above or below ground

LPG (Liquefied Petroleum Gas—propane, butane, blends) is stored under pressure and/or at low temperature. Priorities include mechanical integrity, industrial safety, and compliance with applicable codes and standards (e.g., ASME).

Typical solutions are spheres and bullets, aboveground or mounded (buried under an earth berm) to combine compactness, safety, and availability.

Our expertise

  • Design and construction of high-pressure spheres and bullets, aboveground or mounded.
  • Critical prefabrication in Dunkirk, site erection, testing, and integration (utilities, letdown units, instrumentation).
  • Compliance in France and internationally : ASME VIII, EN 13445, CODAP.

Major LPG projects

Conventional energies

Onshore oil & gas, petrochemicals, terminals

We support onshore Oil & Gas and petrochemical players with reliable, high-performance solutions for process units, terminals, and storage infrastructure (tanks, process networks), and we have recognised expertise in commissioning and ramp-up to performance.

What we do

  • Design and delivery of onshore process units
  • Atmospheric tanks, spheres/bullets, process networks
  • Commissioning and ramp-up to performance
  • Shutdown planning/renewal and brownfield interface management in operating facilities

Examples

  • El Eulma (Algeria): 3 tanks of 20,000 m³
  • Condensate Refinery (Bangladesh)
  • Projects in France, Africa, and the Middle East

Our expertise

Cryogenics & new molecules

Integrated industrial manufacturing

Our offers