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Help CenterKrah Helical Extrusion Pipe Production Line for Corrosion-Resistant Pipe Applications
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Qingdao Yongke Machinery Co., Ltd. (established in 2010) is a professional manufacturer of advanced plastic pipe production lines. Our Krah Helical Extrusion Pipe Production Line is specifically designed for manufacturing corrosion-resistant pipes used in demanding applications such as chemical transport, water supply, sewage, and mining. With over 10 years of experience and a factory spanning 10,000-30,000 square meters, we deliver high-efficiency, reliable machinery that meets global quality standards. This line integrates helical winding technology with precision extrusion, offering unmatched pipe strength and durability while reducing material waste.
The production line operates on the well-established Krah helical extrusion process, which continuously winds and extrudes a melt strip onto a rotating mandrel to form large-diameter, thick-wall pipes. The resulting pipes exhibit excellent corrosion resistance, high hoop strength, and long service life — making them an ideal choice for aggressive fluid handling environments. Our system is fully customizable to produce pipes with varying diameters, wall thicknesses, and material formulations.
Key Technical Features
- Helical Winding Mechanism: Advanced servo-controlled winding ensures uniform wall thickness and tight weld layers.
- High-Performance Extruder: Equipped with grooved feed bushings and barrier screws for high output and melting stability.
- Precision Cooling System: Multi-zone water cooling maintains optimal material temperature for consistent product quality.
- PLC + HMI Control: User-friendly touch screen interface with real-time monitoring of production parameters.
- Online Cutting & Chamfering: Integrated saw and chamfering unit for clean, ready-to-use pipe ends.
- Anti-corrosion Design: All wetted parts are made of stainless steel or corrosion-resistant materials.
- Low Energy Consumption: Energy-efficient drives and insulation reduce operational costs by up to 15%.
Technical Specifications (Sample Model YK-Krah-3000)
| Parameter | Value |
| Pipe Diameter | 300 – 3000 mm (optional up to 4000 mm) |
| Wall Thickness | 10 – 80 mm (customizable) |
| Extruder Output | 300 – 600 kg/h (depending on material) |
| Main Motor Power | 110 kW (AC drive) |
| Line Speed | 0.8 – 2.5 m/min |
| Total Installed Power | ~180 kW |
| Machine Dimensions (L×W×H) | 35m × 5m × 6m |
Advantages for Your Business
- Corrosion Resistance: Pipes made with this line withstand aggressive chemicals and acidic environments, extending infrastructure life.
- Large Diameter Capability: Produce pipes up to 4 meters in diameter, suitable for main water and industrial pipelines.
- Material Flexibility: Supports HDPE, PP, and PE-RT, allowing you to target multiple market segments.
- Reduced Raw Material Waste: Continuous helical winding process uses material efficiently, saving up to 5% compared to conventional extrusion.
- Easy Operation: Automated control reduces labor requirements and minimizes human error.
- Global Shipping & Support: We ship from Qingdao Port and provide on-site installation, training, and remote technical assistance.
Trust & Reliability
As a manufacturer with ISO9001, ISO14000, and OHSAS18001 certifications, Qingdao Yongke Machinery Co., Ltd. ensures every production line meets rigorous quality and environmental standards. Our factory size of 10,000-30,000 sqm houses advanced CNC machining centers and skilled technicians. With an annual export value of US$1-1.5 million and a team of 51-100 employees, we have successfully delivered machinery to markets across North America, Europe, Southeast Asia, Africa, and the Middle East. Our total employee count of 51-100 people includes dedicated R&D engineers who continuously improve the Krah helical extrusion technology. We stand behind our products with a comprehensive warranty and responsive after-sales service.
Choosing our Krah Helical Extrusion Pipe Production Line means investing in a proven technology that delivers high-output, corrosion-resistant pipes with minimal maintenance. Contact us today to request a detailed quotation or schedule a factory visit — we are ready to customize the line to your specific pipe dimensions and material needs.
Frequently Asked Questions
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Q: What types of materials can this line process?
A: It is designed for HDPE, PP, and PE-RT. For other thermoplastics, please consult with our engineers for feasibility evaluation. -
Q: What is the minimum pipe diameter achievable?
A: The standard range starts from 200 mm. We can produce pipes as small as 160 mm with optional adjustments. -
Q: How thick can the pipe wall be?
A: Typical wall thickness ranges from 10 mm to 100 mm depending on diameter and material. Custom requirements are supported. -
Q: Is the production line fully automatic?
A: Yes, the line features PLC + HMI control for automatic winding, cooling, cutting, and chamfering. Manual override is available for maintenance. -
Q: What certifications does the machine have?
A: Our production line is manufactured under ISO9001:2015 quality management system. The final machine can be CE-certified upon request. -
Q: How long does installation and training take?
A: On-site installation typically takes 2-3 weeks, followed by 1 week of operator training. Remote support is provided after handover. -
Q: Can you customize the line for a specific pipe application?
A: Absolutely. We offer customization for diameter, wall thickness, output speed, and auxiliary equipment such as inline testing devices. -
Q: What is the warranty period?
A: We provide a standard 12-month warranty for mechanical parts and electrical components. Extended warranty options are available.
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