1.System Configuration and Key Advantages
A standard PE gas pipeline production line consists of multiple highly automated core units. Its overall advantages lie in its integrated design, high stability, and high safety:
Core Units: These primarily include high-efficiency single-screw extruders, spiral or basket-type extrusion dies, vacuum sizing and cooling systems, haul-off and cutting systems, and a PLC central control system.
Key Advantages:
High Stability and Reliability: The production line features a unique structural design that enables continuous, stable production, ensuring consistent pipe performance.
High Automation: Full-line automatic control from feeding to cutting is achieved via PLC and touchscreen, simplifying operations.
Versatility and Flexibility: By replacing certain dies, the line can produce various pipe materials such as PP-R and PP, enabling a single machine to serve multiple purposes.
2. Key Technical Features and Stringent Standards
To meet the high standards for gas pipelines, the manufacturing machine incorporates special designs in several core components:
Extrusion Unit: Features a grooved barrel and a specialized screw equipped with a barrier and a mixing head to enhance plasticization and ensure high-speed, stable extrusion. The screw length-to-diameter ratio can reach 38:1, with a maximum extrusion capacity of over 1,000 kg/hour per production line.
Die Technology: Spiral or basket-type die heads are used to ensure uniform material flow, dense pipe walls, and minimal internal stress. Die materials are primarily high-strength 40Cr alloy steel to enhance durability.
Dimension and Cooling Control: Integrated water-ring cooling and sizing sleeves with multi-stage vacuum control units, coupled with advanced in-line wall thickness measurement systems, ensure dimensional accuracy and stable roundness of the pipes. The production capacity and energy efficiency of some equipment can be increased by 100% and approximately 35%, respectively.
Safety Regulations: Both manufacturers and end products must meet stringent safety standards, including obtaining a Special Equipment Manufacturing License and adhering to international standards (such as ISO 4437) or national standards during production.
3. High-Efficiency and Energy-Saving Design
Modern production lines also prioritize operational efficiency and energy consumption:
Energy-Efficient Drive: The screw is driven by an AC motor and cooled by a low-noise fan, achieving energy savings of approximately 35% compared to conventional production lines.
Chip-Free Cutting: Equipped with a planetary cutter, the machine produces smooth, even cuts. It also features a powerful chip extraction system to maintain a clean production environment.
High-Efficiency Cooling: The vacuum sizing and water cooling systems are constructed of stainless steel and feature high-power water pumps and specialized spray nozzles to ensure efficient cooling.
4. Key Product Properties
The PE gas pipes produced by this manufacturing equipment offer exceptional key properties, including: excellent long-term creep resistance and resistance to environmental stress cracking, outstanding heat fusion properties, as well as good flexibility and moderate rigidity.
In summary, a PE gas pipeline manufacturing machine is a highly integrated automated system that adheres to stringent safety standards. At the core of its design is the ability to produce high-quality pipes capable of meeting the long-term safety and reliability requirements for urban gas transmission through high-precision, highly stable production processes.