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Industrial LNG Cylinder Production Line

LNG (liquefied natural gas) cylinders are crucial components for heavy trucks, ships, and storage and transportation equipment. Their production must meet high-pressure, ultra-low temperature (-162°C) requirements, as well as stringent safety standards. Modern automated production lines achieve high-quality and efficient production through precise machining, intelligent assembly, and digital management. Here is a comprehensive analysis of the LNG cylinder automated production line.

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    Description

    • 1. Special characteristics of materials and processes Adaptation to low-temperature materials: Metals must pass the -196℃ Charpy impact test (impact energy ≥ 27J). Thermal insulation technology: The vacuum insulation performance requirement is ≤ 0.2W/m·K (daily evaporation rate < 0.3%).

    • 2. High precision manufacturing requirements The roundness error of the inner liner should be ≤ 0.5mm, and the straightness should be ≤ 1mm/m. The control accuracy of the vacuum interlayer spacing is ±0.1mm.

    • 3. Strict safety standards Compliant with international standards such as ISO 11439 (for vehicles) and EN 13458 (for fixed installations). Full life cycle fatigue test (> 15,000 pressure cycles).

    •4. Intelligent Upgrade Digital Twin: Simulate the distribution of low-temperature stress (such as through ANSYS simulation). Robot welding: The qualification rate of TIG welding by robots is over 99.5%.

    Features

    Lng Cylinder Production Line
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    1. High precision welding control

    2. Vacuum insulation process

    • Multi-layer insulation materials (MLI): Reflectivity ≥ 95%, thermal conductivity ≤ 0.001 W/(m·K).

    • Long-term vacuum maintenance: Built-in getters (such as zirconium-aluminum 16) adsorb active gases.

    3. Intelligent management

    • MES system: Trace welding parameters and inspection data for each gas cylinder.

    • Digital twin: Simulate stress distribution under extreme conditions to optimize design.

    Case studies

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    CIMC Enric production line

    • Annual production of 100,000 LNG vehicle gas cylinders, with an automation rate of 85%, and leak rate PPM ≤ 50.

    • Hexagon Purus factory:

    • Fully automated carbon fiber gas cylinder production line, capable of producing 200 units per shift.

    Industry Trends

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    1. Composite material gas cylinders: carbon fiber winding replaces metal casing, reducing weight by 30%. 

    2. Smart gas cylinders: integrated pressure/temperature sensors, real-time data transmission to the cloud. 

    3. Green manufacturing: welding smoke purification rate ≥ 99%, waste aluminum recycling and reuse.

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