The transportation, storage, and distribution of LNG (liquefied natural gas) face the challenge of extremely low temperatures. LNG elastic felt, as a highly efficient insulation material, has gained widespread application in the LNG field due to its superior technical parameters. This article will comprehensively interpret the core technical parameters of LNG elastic felt to help engineering designers, procurement personnel, and construction teams better understand the advantages and applications of this material.

I. Thermal Conductivity: The Key to Energy Saving of LNG Elastic Felt

Thermal conductivity is a key indicator for evaluating the effectiveness of insulation materials. The thermal conductivity of LNG elastic felt is typically 0.018–0.022 W/(m·K), far lower than traditional insulation materials such as rock wool, glass wool, and rubber-plastic composites.

Low thermal conductivity: Ensures minimal temperature fluctuations during LNG storage and transportation, reducing cold loss and saving energy consumption.

As a cryogenic liquid (typically -162°C), LNG needs to be maintained at low temperatures for extended periods. LNG elastic felt, due to its ultra-low thermal conductivity, is an ideal insulation material.

II. Density: Affecting Insulation Performance and Ease of Construction

The density of LNG elastic felt is typically between 100–150 kg/m3. The choice of density directly affects the material's insulation performance and ease of construction.

Lower density: Makes LNG elastic felt lightweight and convenient for transportation and construction.

Moderate density: Ensures insulation performance while meeting the long-term stability requirements of LNG systems.

In large-scale LNG storage and transportation, the density of LNG elastic felt provides both effective insulation and ease of construction.

Glass fiber elastic felt

III. Temperature Range: Adaptable to Low-Temperature Conditions

LNG elastic felt typically has a temperature range of -200°C to +500°C. This wide temperature range makes it suitable for the extremely low-temperature environments of LNG, as well as insulation requirements in some high-temperature conditions.

Strong low-temperature adaptability: LNG is transported and stored at very low temperatures. LNG elastic felt can maintain stable performance at -162°C, preventing condensation and moisture buildup.

This is particularly important for the external insulation of LNG storage tanks, pipelines, and transport vessels.

IV. Hydrophobicity: Reducing the Impact of Moisture on Performance

LNG elastic felt typically has a hydrophobicity of over 98%, a crucial parameter for its moisture-proof and waterproof performance. During transportation and storage, LNG often faces challenges from moisture and dew points. High hydrophobicity allows LNG elastic felt to maintain good insulation performance even in humid environments, unaffected by moisture penetration, ensuring the efficient operation of the LNG system.

Elastic Felt

V. Compressive Strength: Adapting to Harsh Environments

LNG elastic felt typically has a compressive strength >150kPa, meaning it can maintain its shape under external pressure, impact, and vibration. For equipment such as LNG transport vehicles, storage tanks, and pipeline systems, strong compressive strength ensures that the material is not easily deformed, damaged, or loosened during long-term use.

VI. Fire Resistance: Ensuring Safety

Any fire risk in an LNG system can pose a significant safety hazard. LNG elastic felt typically meets Class A non-combustible standards, effectively isolating ignition sources, ensuring the safety of LNG equipment, and reducing losses in the event of a fire.

VII. Dimensional Stability: Suitable for Long-Term Use

LNG elastic felt exhibits minimal dimensional change during long-term use, typically ≤ 1%. This characteristic allows it to maintain stable performance in complex engineering applications, preventing thermal efficiency reduction due to temperature variations, physical damage, etc.

LNG Elastic Felt

As a novel insulation material, LNG elastic felt's low thermal conductivity, wide temperature range, high hydrophobicity, and excellent mechanical properties make it an ideal choice for LNG applications. Understanding these technical parameters helps engineers and procurement personnel select suitable insulation materials for LNG projects, ensuring long-term, efficient, and safe operation.