As the global energy structure shifts towards cleaner energy, the scale of liquefied natural gas (LNG) projects continues to expand in storage, transportation, peak shaving, and end-use. LNG operating conditions are characterized by ultra-low temperatures, large temperature differences, and complex structures, placing higher demands on the performance of insulation materials. Against this backdrop, LNG elastic felt, as a material specifically designed for cryogenic insulation, is gradually being widely used in LNG projects. This article will systematically analyze the application scenarios, performance advantages, and engineering value of LNG elastic felt in LNG projects.

I. Special Requirements for Insulation Materials in LNG Projects

LNG is typically stored and transported at cryogenic temperatures of approximately -162°C. This places unique requirements on insulation systems compared to conventional industrial insulation, primarily including:

Long-term adaptability to extremely low-temperature environments

Good flexibility to prevent cryogenic brittleness

Effective control of cold loss to reduce energy consumption

Structural stability under temperature fluctuations

Adaptability to complex pipelines, equipment, and irregular structures

Under these conditions, traditional rigid insulation materials have limitations in terms of construction adaptability and low-temperature deformation. The material properties of LNG elastic felt make it more suitable for LNG project applications.

II. Overview of the Material Properties of LNG Elastic Felt

LNG elastic felt typically employs a flexible fiber structure design combined with a cryogenic insulation system, maintaining stable physical properties even in low-temperature environments. From an engineering application perspective, its main characteristics include:

Good low-temperature flexibility

Low thermal conductivity, suitable for cryogenic insulation

Adaptability to structural changes caused by thermal expansion and contraction

Easy to cover complex pipelines and equipment

These characteristics make LNG elastic felt highly suitable for use in liquefied natural gas projects.

III. Main Application Scenarios of LNG Elastic Felt in Liquefied Natural Gas Projects

1. LNG Cryogenic Pipeline Insulation Application

In LNG receiving terminals, liquefaction plants, and transportation systems, a large number of cryogenic pipelines need to operate for extended periods. LNG elastic felt can tightly adhere to the pipeline surface, forming a continuous insulation layer, which helps reduce cold loss and lowers the risk of frost formation on the outer surface.

The application of LNG elastic felt in pipeline systems is beneficial for:

Improving cryogenic transportation efficiency

Reducing system energy consumption

Reducing structural stress caused by temperature differences

2. LNG Storage Tank and Auxiliary System Insulation

LNG storage tanks and their auxiliary pipelines are key components of cryogenic insulation systems. LNG elastic felt can be used as a component in multi-layer insulation systems for thermal insulation of tank exteriors or connection points.

Its flexible structure helps to:

adapt to temperature changes during tank operation

improve the overall continuity of the insulation layer

reduce insulation defects caused by structural changes

3. Application in LNG loading/unloading and pressure regulating systems

In LNG loading/unloading arms, valves, flanges, and other areas with complex structures and limited space, the adaptability of insulation materials for construction is crucial. LNG elastic felt is easy to cut and wrap, making it suitable for these irregularly shaped areas and helping to improve the integrity of the overall insulation system.

4. Insulation of cryogenic equipment in LNG projects

In liquefied natural gas projects, various cryogenic equipment operates in a deep-cold state for extended periods. LNG elastic felt can be used for cryogenic insulation of equipment exteriors and connection points, helping to control cold loss and maintain equipment operational stability.

IV. Advantages of LNG Flexible Felt in Liquefied Natural Gas Projects

✔ Stability in Cryogenic Conditions

LNG flexible felt maintains its flexibility in low-temperature environments, helping to prevent the material from becoming embrittled at low temperatures and affecting its insulation performance.

✔ Helps Control Cold Loss

By reducing heat transfer to the outside environment, LNG flexible felt helps improve energy efficiency in liquefied natural gas projects.

✔ Enhanced Construction Adaptability for Complex Systems

Flexible materials can more easily cover complex structures such as elbows and valves, reducing insulation blind spots.

✔ Supports Long-Term Continuous Operation

Under reasonable design and standardized construction conditions, LNG flexible felt can meet the long-term stable operation requirements of liquefied natural gas projects.

V. Precautions for Using LNG Elastic Felt in Liquefied Natural Gas Projects

In practical engineering applications, LNG elastic felt should be selected appropriately based on project conditions, and the following should be noted:

Clearly define the design temperature range and material compatibility.

Use in conjunction with protective layers and moisture-proof structures.

Strictly adhere to construction specifications to ensure the integrity of the insulation system.

Regularly check the operating status to ensure long-term effectiveness.

Overall, LNG elastic felt is mainly used for thermal insulation of cryogenic pipelines, storage tank systems, and cryogenic equipment in liquefied natural gas projects. Its excellent low-temperature flexibility, stable thermal insulation performance, and adaptability to complex structures make it one of the important materials in the cryogenic insulation system of LNG projects. As the scale of liquefied natural gas project construction continues to expand, the application value of LNG elastic felt in related projects will continue to be demonstrated.