How to Verify Material Lifespan at –162°C?

Enpuda’s Electro-Hydraulic Servo Dynamic Fatigue Tester Delivers the Answer

Buses on the road, the flames on our stoves, and the heating that keeps us warm in winter – all of these daily essentials share one “invisible steward”: Liquefied Natural Gas (LNG).

As both a highly efficient and ecologically sound energy source, LNG also serves as a critical bridge in the global transition toward renewable energy.

Liquefied Natural Gas (LNG) must be stored and transported at ultra-low temperatures as low as –162°C. Prolonged exposure to such extreme cold can cause critical components – including storage tanks, pipelines, and valves – to become brittle and develop cracks, posing significant safety hazards.

This is why ultra-low temperature fatigue testing is essential to the integrity of LNG equipment. By simulating the cryogenic cyclic loads that occur in actual service conditions, this testing method rigorously evaluates the long-term durability of materials under extreme cold. The results provide a vital foundation for material selection and design finalization, ensuring that equipment can withstand the harshest operating environments with confidence.

The value of ultra-low temperature fatigue testing extends far beyond the energy sector.

Its critical role is equally prominent in aerospace – where it supports liquid oxygen and liquid methane propulsion systems, deepspace exploration vehicles, and spacecraft external structures – as well as in scientific research and exploration, including high-end components for polar engineering and cryogenic parts for deep-sea submarines.

To address the diverse fatigue-reliability testing requirements of materials used in such extreme cryogenic conditions, Enpuda offers the EH-9105 Electro-Hydraulic Servo Dynamic Fatigue Testing Machine. Equipped with a dedicated cryogenic environmental chamber, this system delivers a complete and mature testing solution, ensuring accurate, repeatable, and reliable performance evaluation across the most demanding applications.

Enpuda EH-9105 Electro-Hydraulic Servo Dynamic Fatigue Testing Machine

This machine is primarily designed for dynamic and static mechanical performance testing of various materials, components, elastomers, shock absorbers, and structural members.

It can perform tensile, compression, bending, low-cycle and high-cycle fatigue, crack growth, and fracture mechanics tests under sinusoidal, triangular, square, trapezoidal, and combined waveforms.

The system can also be equipped with environmental test chambers to conduct simulation tests at different temperatures.

Product Advantages

1. Stable and Durable, Easy to Operate：It uses a closed-frame rack, which provides high overall stiffness with no backlash, making it very stable in operation. The column is hard chrome plated, wear-resistant and corrosion-resistant, ensuring a long service life. The bottom-mounted bidirectional servo cylinder makes sample clamping and adjustments very easy and flexible, capable of accommodating various test sample requirements.

2. High-End Core Components：The machine uses top-brand core components from multiple countries: MOOG servo valve, DOLI controller, Nachi oil pump, Strain gauge sensor, and MTS displacement sensor. The hardware performance is solid, and measurement and control data are very precise. It adopts silent, leak-free hydraulic technology, with stable output pressure and no fluctuations. It operates quietly, dissipates heat well, has high oil filtration precision, and comes with built-in overpressure and over-temperature protection, making the hydraulic system safer to use.

3. Smooth Multi-Mode Switching：It supports three-channel PID closed-loop control for force, displacement, and deformation. Different control modes can switch seamlessly and smoothly, which is ideal for complex dynamic test conditions.

4. Comprehensive Software Functions：Compatible with Windows OS, it can perform various static and dynamic mechanical tests such as tensile, compression, bending, low-cycle fatigue, and fracture mechanics. It also comes with full-process functions like data storage, test management, and one-click report printing, making operation very efficient.

5. Multiple Safety Protections：It integrates comprehensive alarm and shutdown protections for oil circuit blockages, high oil temperature, low oil level, hydraulic overload, motor overheating, reaching fatigue cycles, and specimen fracture. This effectively prevents equipment damage and test failures.

The Enpuda EH-9105 Electro-Hydraulic Servo Dynamic Fatigue Testing Machine is designed not only for ultra-low temperature fatigue performance testing of various materials, but also for crack propagation, fracture toughness, low-cycle and high-cycle fatigue, static tensile/compression and bending, hydrogen embrittlement fatigue, and more.

Looking ahead, we will continue to focus on equipment testing demands across a broader range of industries, delivering precise and stable testing solutions that reinforce the safety and quality foundation of our customers’ products.