> News > Industry Knowledge

What advantage of POK Pipe Extrusion Equipment UL

2025-06-19

POK (Polyoxymethylene Ketone) pipe extrusion equipment—especially UL-certified systems—offers unique advantages due to the material's high-performance properties and the precision demands of regulated markets (such as electrical conduit, high-temperature plumbing, or fuel delivery). Below are the key advantages of POK pipe extrusion equipment built for UL standards:

✅ Advantages of POK Pipe Extrusion Equipment (UL Certified)

Advantage	Explanation
1. High-Temperature Stability	POK processes at 240–270°C, requiring extrusion lines with high-temp zones, corrosion-resistant screws, and tight melt control. UL-certified systems ensure consistent wall thickness and thermal resistance.
2. Excellent Dimensional Accuracy	UL-certified equipment incorporates precision calibration sleeves, vacuum tanks, and laser diameter control, essential for tight tolerances in electrical or industrial POK applications.
3. Chemical and Fuel Resistance Compatibility	POK is often used for fuel lines or chemical fluid pipes—equipment must be built with high-alloy steel or bimetallic barrels to resist corrosion and abrasion. UL validation ensures long-term pipe integrity.
4. Flame Retardancy and Compliance	POK pipes for electrical conduits or transport must meet UL 94 V-0 and other flammability standards. UL-rated equipment ensures consistent extrusion quality to pass these tests.
5. Integrated Cooling & Stress Relieving	POK requires controlled cooling and post-extrusion stress relief. UL-certified lines often feature multi-stage water tanks or heating-cooling zones for annealing and dimensional stability
6. Multi-Layer/Co-Extrusion Compatibility	POK pipes can be co-extruded with protective outer layers (e.g., EVOH, flame-retardant). UL-grade lines often include co-extruder integration and multi-channel die-heads.
7. Advanced Automation and Monitoring	UL pipe extrusion lines use PLC + HMI control, with real-time thickness, ovality, and melt pressure monitoring. This ensures consistency for regulated pipe grades.
8. End-Use Certification Support	Machines designed for UL applications often come with supporting documentation, calibration logs, and data tracking for easier pipe batch traceability and UL audit readiness.

Typical Applications of UL-Standard POK Pipes:

· Electrical conduit (UL 651 compliant)

· Fuel system pipes (automotive & aerospace)

· High-pressure chemical transport pipes

· Hot water or steam transport pipes

· Reinforced composite pipes (POK + glass/carbon fiber)

Ideal Line Configuration:

· High-torque single-screw extruder with corrosion-resistant metallurgy

· Melt pumps for precision dosing

· Stainless steel vacuum calibration & spray tanks

· Multi-caterpillar haul-off

· Chipless or planetary cutter

· Optional: In-line annealing tunnel or post-curing oven

Previous:Precautions for using plastic pipe coiling machine

Next:Key Components of a Bulk Plastic Pipe Coiler