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As a leading manufacturer in China, Qingdao Yongke Machinery Co., Ltd (established in 2010) proudly presents our HDPE Krah Pipe Spiral Winding Extrusion Line, specifically engineered for high-quality corrugated pipe production. With over a decade of expertise and a factory spanning 10,000–30,000 square meters, we deliver robust, reliable, and cost-effective solutions for drainage, sewer, and irrigation systems worldwide. Our line integrates advanced spiral winding technology with precision extrusion, ensuring consistent wall thickness and superior pipe ring stiffness.
This production line is designed to manufacture HDPE Krah pipes (also known as spiral wound corrugated pipes) with diameters ranging from 200 mm to 3000 mm. It combines a high-performance extruder, a spiral winding unit, a cooling system, and a cutting station into one automated process. Whether you need pipes for stormwater management, sewage, or industrial applications, our line offers flexibility, energy efficiency, and long-term durability.
Key Features & Benefits
- Advanced Spiral Winding Technology: Ensures uniform pipe structure and high ring stiffness (SN ≥ 4 kN/m² to SN 16 kN/m²).
- High Output Capacity: With screw diameters from 90 mm to 150 mm, production rates reach 100–500 kg/h, customizable per your requirements.
- PLC Touch-Screen Control: Automates temperature, speed, and winding parameters for consistent quality and reduced labor.
- Energy-Efficient Cooling System: Combines water spray and air cooling to minimize energy consumption while ensuring proper crystallization.
- Flexible Pipe Size: Quick changeover between diameters (200–3000 mm) with simple mold adjustments.
- Durable Construction: Made of high-grade steel and corrosion-resistant components for long service life.
- Low Maintenance: Modular design allows easy access to key parts, reducing downtime.
Technical Specifications
| Parameter | Value / Range |
|---|---|
| Extruder Screw Diameter | 90 mm / 120 mm / 150 mm |
| Pipe Diameter Range | 200 mm – 3000 mm |
| Production Capacity | 100 – 500 kg/h |
| Ring Stiffness (SN) | SN4 – SN16 (kN/m²) |
| Wall Thickness | 3 mm – 30 mm (adjustable) |
| Total Installed Power | 150 – 350 kW |
| Cooling Method | Water Spray + Air Cooling |
| Control System | PLC + HMI Touch Screen |
Detailed Process Overview
The HDPE Krah pipe production line operates through several integrated stages:
- Extrusion: HDPE granules are melted and plasticized in the single-screw extruder. The molten material is fed into the spiral winding head.
- Spiral Winding: The winding head rotates and deposits the melt in a continuous helical pattern over a mandrel, forming the pipe's corrugated structure. A secondary extrusion layer may be added for smooth inner walls.
- Cooling & Sizing: The formed pipe passes through water spray tanks and air knives to solidify the material. A vacuum calibration system ensures precise outer diameter.
- Cutting & Stacking: A synchronized traveling saw cuts the pipe to customer-specified lengths (typically 6 m or 12 m). Pipes are then stacked automatically or manually.
Why Choose Qingdao Yongke Machinery?
With 15 years of experience in extrusion equipment manufacturing, we have supplied complete lines to clients across North America, Europe, Southeast Asia, Africa, and Oceania. Our factory is certified with ISO9001, ISO14000, and OHSAS18001, reflecting our commitment to quality, environmental management, and occupational health. We employ a team of 51–100 skilled professionals and maintain an annual export value of US$1 Million – US$1.5 Million.
We provide end-to-end support: from layout design and installation supervision to operator training and after-sales technical service. Our HDPE Krah pipe line is built to last, with a typical lifespan exceeding 10 years under normal operation. Spare parts are readily available, and our engineers are on call for remote troubleshooting.
Ready to upgrade your pipe production? Contact us today for a customized quotation and free consultation. Let our expertise help you achieve higher efficiency, lower costs, and superior pipe quality.
Frequently Asked Questions (FAQ)
1. What raw materials are suitable for this line?
The line is specifically designed for HDPE (high-density polyethylene) granules. We recommend using virgin or recycled HDPE with appropriate MFI (melt flow index) values between 0.3–1.5 g/10 min for optimal processing.
2. What is the maximum pipe diameter you can produce?
Our standard line can produce pipes from 200 mm to 3000 mm in outer diameter. Custom molds for larger sizes (up to 4000 mm) are available upon request.
3. How long does it take to change pipe sizes?
Changing the mandrel and winding head to adjust the diameter typically takes 2–4 hours for a trained team. The control system stores presets for different sizes to minimize downtime.
4. Do you provide installation and training?
Yes, we offer on-site installation supervision and operator training for your staff. Remote video guidance is also available as an option.
5. What certifications does your line meet?
Our manufacturing facility is certified under ISO9001, ISO14000, and OHSAS18001. The produced pipes can comply with international standards such as ASTM F894, EN 13476, or GB/T 19472 depending on your requirements.
6. What is the typical power consumption?
Total installed power ranges from 150 kW to 350 kW depending on the extruder size. Actual consumption varies with output and material, typically around 0.3–0.5 kWh per kg of pipe.
7. Can I use recycled HDPE material?
Yes, the line can process both virgin and recycled HDPE. However, we recommend blending recycled material with virgin to maintain consistent melt quality and pipe performance.
8. What is the warranty period?
We offer a standard one-year warranty on the entire line, covering defects in materials and workmanship. Extended warranty options are available upon negotiation.
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