LNG Loading & Unloading Arm: Evolution, Composition, & Benefits

Evolution:
The LNG loading and unloading arm is a testament to engineering ingenuity, evolving from the traditional stainless steel corrugated hose. This advanced design offers unparalleled flexibility and sealing performance, revolutionizing the way LNG is transferred between tank trucks and storage/transportation pipelines.

Composition:
The arm's robust construction comprises premium components, each meticulously selected for optimal performance:

• High-Quality Rotary Joints: Large load-resistant for smooth, effortless rotation.

• Pipes & Accessories: Durable and corrosion-resistant, ensuring safe fluid transfer.

• Balancing Devices: Minimize stress on the process pipeline, enhancing longevity.

• Support Mechanisms: Ensuring stability during operation.

• Column Load-Bearing Structure: Maximizes product lifespan by minimizing mechanical stress.

Integrated Pipelines:
The arm integrates three critical pipelines into one efficient column:

• Liquid Pipeline: Handles the transfer of liquefied natural gas (LNG).

• Gas Pipeline: Facilitates gas flow for balancing or venting purposes.

• Pressurized Liquid Pipeline: Maintains system pressure and ensures smooth fluid movement.

Additional Components:

• Pull-Off Valve & Cryogenic Valve: Ensuring safe and controlled disconnection and temperature management.

• Inner & Outer Arms: Flexible yet sturdy, accommodating a wide range of movements.

• Spring Steel: Provides resilience and durability.

• Static Conduction Device: Ensures safe dissipation of static electricity.

• Nitrogen Blower (Optional): Enhances purging capabilities (though not required for all models).

• Cleaning Device: Facilitates easy maintenance and keeps the system hygienic.

Benefits:

• Versatility: Widely applicable in gas filling stations, storage facilities, LNG liquefaction plants, and more.

• Cost-Effectiveness: Significantly reduces production costs while maintaining high standards of safety.

• Safety: Ensures operator safety through its robust design and sealing performance.

• Longevity: With its load-bearing structure and premium components, the arm offers a long service life.

• Efficiency: Smooth rotation and seamless integration of pipelines streamline the loading and unloading process.

Performance and Key Parameters of LNG Loading & Unloading Arm

1. Usage Scenario:

• The LNG loading and unloading arm is specifically designed for the efficient and safe transfer of liquefied natural gas (LNG) between tanker trucks and storage or transportation pipelines.

2. Main Arm Rotation Radius:

• 3720mm, allowing for wide-range maneuverability and adaptability to various tanker truck configurations.

3. Material Pipes:

• The arm incorporates three primary material pipes:

• LNG Liquid Phase Pipe: Carries the liquefied natural gas.

• Pressurized Liquid Phase Pipe: Maintains system pressure and facilitates smooth fluid flow.

• BOG Gas Phase Pipe: Handles boil-off gas (BOG), ensuring proper venting and pressure management.

4. Swivel Joint Rotation:

• 270°, providing flexibility during the loading and unloading process, enabling smooth and precise alignment with tanker truck connections.

5. Design Temperature:

• -196°C, ensuring compatibility with the extreme cold temperatures of liquefied natural gas.

6. Medium:

• LNG (Liquefied Natural Gas), specifically designed to handle this cryogenic fluid.

7. Maximum Inlet Pressure:

• 1.2 MPa, indicating the upper limit of pressure the system can safely handle at the inlet point.

8. Minimum Inlet Pressure:

• 0.1 MPa, the minimum pressure required for efficient and safe fluid transfer.

9. Maximum Working Pressure:

• 1.4 MPa, the maximum pressure the system can operate under during normal working conditions.

10. Design Pressure:

• 1.6 MPa, a safety margin above the maximum working pressure, ensuring the arm's structural integrity and reliability.

11. Flow Rate:

• 50m³/h (liquid), the maximum flow rate of LNG that can be transferred through the system, ensuring efficient loading and unloading operations.

12. Import Flange:

• DN50, conforming to HG20592-2009B standards, ensuring compatibility with standard tanker truck connections.

13. Outlet Flange:

• DN50, also conforming to HG20592-2009B standards (flanging flange), facilitating seamless integration with storage or transportation pipelines.

This comprehensive set of performance parameters and specifications underscores the advanced capabilities and reliability of the LNG loading and unloading arm, making it an ideal solution for the efficient and safe transfer of LNG in tanker truck operations.