Cryogenic LNG Storage Tank

Cryogenic LNG Storage Tank

High-Performance LNG Storage Solutions for Energy, Industry, and Transportation

The Cryogenic LNG Storage Tank is a double-wall, vacuum-insulated pressure vessel designed to safely store liquefied natural gas at temperatures down to –162°C. The inner vessel is constructed from stainless steel or low-temperature alloy steel, while the outer shell is fabricated with high-strength carbon steel. The space between the double wall is filled with multi-layer insulation (MLI) and high vacuum, ensuring excellent thermal performance.

These tanks are widely used in LNG satellite stations, LNG fueling stations, industrial energy supply systems, peak-shaving stations, gas power plants, metallurgy, chemical processing, and clean-energy projects.

Key Features and Advantages

1) Advanced Vacuum Insulation System

• Multi-layer super insulation (MLI)

• High vacuum level with long-term stability

• Reduced boil-off rate and optimized LNG retention

2) Robust Structural Design

• Inner vessel: stainless steel or 9% nickel low-temperature steel

• External vessel: high-strength carbon steel

• Designed for complex outdoor working conditions

3) High Safety and Compliance

• Manufactured according to ASME, CE/PED, GB150, ISO standards

• Compliance with LNG storage and transportation safety regulations

• Complete NDT, pressure, and vacuum testing

4) Intelligent Manufacturing Capability

CNCD applies large-scale automated equipment to ensure production stability, including:

• Automatic circumferential/longitudinal welding machines

• Robot welding equipment

• Advanced rolling and forming machines

• DXWP5500 shot-blasting and rust-removal systems

• 600 m² automatic painting workshop

5) Low Operating Cost & High Value

• Long insulation life

• Reduced LNG loss due to ultra-low evaporation rate

• Stable pressure maintenance

• Suitable for long-term continuous operation

How the LNG Storage Tank Works

LNG is stored inside the inner vessel under cryogenic conditions. The combination of high vacuum, multi-layer insulation, and specialized structural design prevents heat ingress and maintains LNG at its liquid state.

Key working principles:

• The vacuum insulation layer reduces thermal conduction and radiation.

• The multi-layer insulation film minimizes heat transfer.

• The pressure-regulating system ensures stable operating pressure.

• The safety valve & bursting disc provide dual protection.

• The process pipeline system allows filling, discharge, pressure release, and metering.

This system ensures efficiency, safety, and long-term stability in industrial and energy applications.