In liquefied natural gas (LNG) storage and transportation and related engineering, insulation materials need to operate stably for extended periods in extremely low-temperature environments. LNG elastic felt, due to its excellent flexibility and low-temperature adaptability, is widely used in pipeline, equipment, and valve insulation systems. Its performance within its temperature range is a crucial basis for engineering selection and system design. This article analyzes the performance of LNG elastic felt in different temperature ranges from the perspectives of material properties and engineering applications.

First, in the extremely low-temperature range, the core advantages of LNG elastic felt are evident. This type of material is typically based on high-performance fibers or composite structures, maintaining good elasticity and structural integrity under cryogenic conditions, and is not prone to embrittlement or cracking. This characteristic allows it to adapt to the long-term low-temperature operation requirements of LNG, providing reliable protection for system safety.

Second, in the transition range from cryogenic to ambient temperature, LNG elastic felt exhibits stable thermal performance. While the thermal conductivity of the material fluctuates somewhat with temperature changes, the overall change is relatively controllable, without significant performance abrupt changes. This stability helps the system maintain a relatively consistent insulation effect during start-up and shutdown, load fluctuations, or changes in ambient temperature, reducing cold loss and energy consumption fluctuations.

Third, from a mechanical performance perspective, the ability to maintain elasticity within the temperature resistance range is crucial. In low-temperature environments, some traditional insulation materials are prone to cracking or delamination due to uneven shrinkage. LNG elastic felt maintains good flexibility within its designed temperature resistance range, adapting to pipeline thermal expansion and contraction and structural micro-deformation, reducing the risk of stress concentration and localized failure in the system.

Fourth, material stability also needs attention under conditions approaching the upper limit of temperature resistance. Although LNG elastic felt is mainly used in cryogenic applications, localized temperatures may rise temporarily when equipment is shut down or the external environment changes. A properly selected elastic felt should maintain structural and performance stability within its specified upper temperature resistance limit, without significant softening or performance degradation, thereby ensuring the safety and controllability of system operation.

Fifth, from a system application perspective, temperature resistance performance is not a single material indicator, but is closely related to thickness design, sealing structure, and protective layer configuration. Even if a material itself possesses a good temperature resistance range, inadequate system design or construction can still affect its performance during actual operation. Therefore, in engineering practice, a comprehensive design and verification approach based on the entire system is essential.

Overall, LNG elastic felt maintains relatively stable thermal and mechanical properties within its designed temperature range, meeting the stringent requirements of LNG projects for cryogenic insulation materials. By selecting appropriate materials, designing scientifically, and constructing according to specifications, fully utilizing its performance advantages within its temperature range helps improve the safety, stability, and long-term operational reliability of LNG insulation systems. This is also a crucial technical basis for the widespread application of LNG elastic felt in related projects.