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Help CenterHDPE Krah Spiral Winding Corrugation Pipe Extrusion Machine
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As a leading manufacturer from Qingdao, China, Qingdao Yongke Machinery Co., Ltd. has been dedicated to the production of reliable extrusion equipment since 2010. Our HDPE Krah Spiral Winding Corrugation Pipe Extrusion Machine represents the latest advancement in large-diameter pipe manufacturing, combining proven Krah technology with robust engineering. This solution is designed to produce high-strength, lightweight structured wall pipes ideal for stormwater drainage, sewer systems, and industrial piping. With ISO9001, ISO14000, and OHSAS18001 certifications, we ensure every machine meets international standards for quality, safety, and environmental responsibility.
Unlike conventional pipe extrusion lines, our Krah spiral winding process produces pipes with a smooth inner wall and a corrugated outer profile, achieving an exceptional strength-to-weight ratio. The machine is fully customizable to match your specific production needs, with options for different screw diameters, output capacities, and downstream equipment. Below we provide a detailed overview of the machine's features, technical specifications, and the advantages you can expect.
Key Features and Technical Specifications
- Advanced Spiral Winding Technology: The pipe is formed by continuously winding and welding an extruded HDPE profile onto a rotating mandrel, creating a seamless corrugated structure with superior ring stiffness (SN2–SN16).
- High Output Efficiency: Depending on the configuration, the machine can produce up to 600 kg of pipes per hour, significantly reducing your production cost per meter.
- Energy-Saving Drive System: All motor drives are equipped with Siemens or equivalent inverters, ensuring precise speed control and lower power consumption.
- Durable Screw and Barrel: Made from nitrided steel with bimetallic lining, the screw and barrel offer extended service life even when processing recycled HDPE materials.
- Comprehensive Downstream Package: Includes vacuum calibration tank, spray cooling unit, haul-off, automatic cutter, pipe stacker, and optional bell socket (socket-forming device for joint connections).
- PLC Touch Screen Control: User-friendly Siemens or Mitsubishi PLC system with HMI touch panel allows one-person operation and real-time monitoring of temperature, pressure, speed, and production data.
- Modular Design: The machine can be easily adapted to produce different pipe diameters (DN200 to DN3000) by changing the winding mandrel and adjusting extrusion parameters.
| Parameter | YK-Krah-1000 | YK-Krah-2000 | YK-Krah-3000 |
| Pipe Diameter Range (mm) | DN200 – DN1000 | DN400 – DN2000 | DN500 – DN3000 |
| Output Capacity (kg/h) | 100 – 250 | 200 – 400 | 300 – 600 |
| Main Extruder Screw Diameter (mm) | 75 | 90 | 120 |
| Total Installed Power (kW) | 120 – 160 | 180 – 230 | 240 – 280 |
| Pipe Length Standard (m) | 6 or customizable | 6 or customizable | 6 or customizable |
Raw Material Flexibility: The machine can process virgin HDPE granules, recycled HDPE (crushed regrind), or a mixture of both. Our screw design ensures excellent homogenization, yielding pipes with consistent wall thickness and mechanical properties. This feature is especially attractive for cost-conscious manufacturers who want to use post-consumer or post-industrial recyclates without compromising quality.
Ease of Installation and Operation: We provide a complete installation guide, on-site commissioning by our experienced engineers (optional), and a detailed operation manual. The machine's compact footprint minimizes factory space requirements. Additionally, our technical team offers remote support via video call to troubleshoot any issues.
Why Choose Our Krah Pipe Line? The spiral winding corrugation process offers distinct advantages over traditional two-wall corrugated (double-wall) pipe lines: better creep resistance, higher ring stiffness for deep burial applications, and lower raw material consumption per meter. Many of our clients in North America, Europe, and Africa have successfully used this machine to produce pipes for municipal drainage, highway culverts, and agricultural irrigation projects.
Trusted Partnership and After-Sales Service
Since 2010, Qingdao Yongke Machinery Co., Ltd. has grown into a reliable supplier with a factory covering 10,000–30,000 square meters and an experienced team of 51–100 employees. Our annual export value of US$1–1.5 million demonstrates our active presence in international markets. We ship from Qingdao Port and have delivered machines to over 15 countries and regions including North America, Southeast Asia, and the Middle East.
Every machine undergoes rigorous testing before shipment, and we provide a 12-month quality warranty. Our spare parts inventory ensures quick delivery of commonly replaced components such as screws, barrels, and cutting blades. We also offer training at our factory or your site to help your operators master the production process quickly. With our ISO-certified management system, you can trust that your investment is protected by consistent quality and responsive service.
Ready to upgrade your pipe production capacity? Contact us today for a detailed quotation, layout drawing, and technical proposal tailored to your specific requirements. Our team is ready to support you from initial consultation to machine commissioning and beyond.
Frequently Asked Questions
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Q: What is the maximum pipe diameter this machine can produce?
A: Our standard models can produce pipes from DN200 up to DN3000 mm. The YK-Krah-3000 model supports up to 3000 mm outer diameter. Larger diameters can be discussed for special orders. -
Q: Can the machine use recycled HDPE material?
A: Yes, the machine is designed to process both virgin and recycled HDPE. We recommend using regrind with a MFI (Melt Flow Index) of 0.3–1.0 g/10 min for optimal results. We also provide a crusher and washing system as optional add-ons to prepare recycled flakes. -
Q: How long is the delivery time?
A: Typical lead time is 45–60 days after receiving the down payment, depending on the configuration and order volume. We can expedite delivery for standard models upon request. -
Q: Do you provide installation and commissioning services?
A: Yes, we offer on-site installation and commissioning by our experienced engineers. The service fee includes travel and accommodation expenses. Alternatively, we can provide detailed video guidance for your team to perform the installation independently. -
Q: What is the minimum order quantity (MOQ)?
A: For this HDPE Krah spiral pipe line, the MOQ is one complete set. We also accept orders for just the extruder or downstream parts if you already have existing components. -
Q: Does the machine come with a warranty?
A: Yes, we provide a 12-month warranty covering defects in materials and workmanship. We also stock common spare parts such as screws, barrels, seals, and heating rings to minimize downtime. -
Q: Can the machine produce pipes with a smooth inner wall and corrugated outer wall?
A: Absolutely. That is the core function of the Krah spiral winding process: the inner wall remains smooth for low friction flow, while the outer wall features a spiral corrugation for high ring stiffness. The result is a pipe that is both strong and lightweight. -
Q: What kind of training do you offer?
A: We provide free training at our factory in Qingdao for up to 3 operators. For remote customers, we can conduct online training via video conference. The training covers machine operation, maintenance, and troubleshooting.
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