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Qingdao Yongke Machinery Co., Ltd., established in 2010 and located in Qingdao, Shandong, China, is a specialized manufacturer of advanced plastic pipe production equipment. With a factory spanning 10,000–30,000 square meters and a dedicated team of 51–100 employees, we have been delivering reliable machinery to global markets for over a decade. Our Automatic HDPE Krah Pipe Production Equipment for Spiral Corrugated Large Diameter Pipe represents the pinnacle of our engineering expertise, designed to produce high-strength, lightweight, and cost-effective large-diameter pipes for demanding infrastructure projects. This fully automatic system combines German-inspired Krah technology with our own innovations, ensuring superior pipe quality, energy efficiency, and long-term durability.
The equipment is engineered to manufacture spiral corrugated HDPE pipes with diameters ranging from 200mm up to 3000mm, making it ideal for applications such as stormwater drainage, sewage systems, culverts, and industrial water transportation. The automatic process eliminates manual intervention, reduces labor costs, and guarantees consistent output. Each machine is built with high-grade components, including servo motors, PLC touch-screen controls, and precision-machined molds, to meet the rigorous demands of continuous production.
Key Features & Technical Specifications
- Fully Automatic PLC Control System – Intuitive interface for easy operation, real-time monitoring, and parameter adjustment. Reduces human error and ensures repeatable quality.
- High-Output Extrusion System – Equipped with a powerful single-screw extruder, capable of processing HDPE at rates up to 600 kg/h (depending on model). Output speed ranges from 10 to 30 meters per minute.
- Spiral Winding & Corrugation Technology – Patented forming unit creates precise spiral grooves and corrugations, enhancing pipe ring stiffness while maintaining flexibility.
- Automatic Cooling & Calibration – Multi-stage water spray cooling and vacuum calibration ensure exact pipe dimensions and smooth internal/external surfaces.
- Integrated Cutter & Stacker – Servo-driven traveling saw cuts pipes to preset lengths (usually 6m or 12m) with ±2mm accuracy; automatic unloading system reduces manual handling.
- Energy-Saving Design – High-efficiency heating elements and variable-frequency drives reduce electricity consumption by up to 20% compared to conventional systems.
- Durable Molds & Tooling – Made from hardened alloy steel with chromium coating, offering 3–5 times longer service life than standard molds. Custom molds available for special diameters or wall thicknesses.
| Parameter | Specification |
| Pipe Diameter Range | 200 – 3000 mm |
| Wall Thickness | 2 – 50 mm (customizable) |
| Extruder Model | SJ-90/33 to SJ-150/33 |
| Motor Power | 55 – 160 kW |
| Production Speed | 10 – 30 m/min |
| Total Power | 80 – 250 kW |
| Machine Weight | 18 – 45 tons |
| Dimensions (L×W×H) | 25×4×3 m (typical) |
Advantages for Your Business
- Lower Production Cost – The automatic system reduces labor needs by 70%, and the energy-efficient design cuts electricity bills significantly.
- High Pipe Quality – Consistent wall thickness, smooth inner surface, and high ring stiffness (SN8 to SN16) ensure pipes meet international standards for underground installation.
- Versatility – Easily switch between different diameters and wall thicknesses with quick-change mold sets. Suitable for both SN8 and SN16 rated pipes.
- Reliable After-Sales Service – Qingdao Yongke provides on-site installation, training, and 12-month warranty. Spare parts are readily available from our warehouse.
- Global Experience – We have exported to over 20 countries including North America, South America, Europe, Africa, and Oceania. Our machines are trusted by major pipe manufacturers worldwide.
At Qingdao Yongke Machinery, we are committed to delivering excellence. Our factory is ISO9001, ISO14000, and OHSAS18001 certified, reflecting our dedication to quality management, environmental responsibility, and occupational health safety. With an annual export value of US$1 million to US$1.5 million, we have proven our ability to serve international clients with professionalism. Our experienced team (51–100 people) ensures every machine is rigorously tested before shipment. From the port of Qingdao, we deliver to any corner of the world. Whether you need a standard line or a customized solution, we are ready to discuss your requirements. Contact us today for a competitive quotation and technical proposal.
Frequently Asked Questions (FAQ)
- 1. What raw materials can this machine process?
- Our equipment is specifically designed for HDPE (High Density Polyethylene) resin, typically with a melt flow index (MFI) of 0.2–1.0 g/10min. It can also process certain PE blends and recycled material with proper adjustment. We recommend using virgin HDPE for optimal pipe quality.
- 2. What is the maximum pipe diameter and length?
- The standard machine can produce pipes from 200mm up to 3000mm in diameter. Standard pipe length is 6m or 12m, but custom lengths (e.g., 3m, 8m) can be achieved by adjusting the cutter program. Please specify your required length when ordering.
- 3. How long does it take to change mold for a different diameter?
- A skilled operator can complete a mold change in approximately 4–6 hours. The system is designed with quick-lock mechanisms to minimize downtime. We provide detailed changeover procedures and training.
- 4. What is the typical production output per day (8-hour shift)?
- Output depends on pipe diameter and wall thickness. For a 1000mm pipe with 8mm wall thickness, the machine can produce about 800–1000 meters in an 8-hour shift. For smaller diameters, output can exceed 1500 meters per shift.
- 5. Does the machine come with PLC programming and remote support?
- Yes, the PLC (Siemens or Mitsubishi) is pre-programmed with standard parameters. We offer remote technical support via video call or email. On-site commissioning and training are also available.
- 6. What certifications does your machine have?
- Our factory management system is ISO9001, ISO14000, and OHSAS18001 certified. Individual machine components (motors, drives) carry CE marks upon request. The final production line can be tested to meet customer-specific standards.
- 7. How do you handle spare parts supply?
- We maintain an inventory of commonly used spare parts (screws, barrels, molds, electrical components) in our Qingdao warehouse. For emergency needs, we can ship within 24 hours. A recommended spare parts list is provided with each machine.
- 8. What is the warranty period and after-sales service?
- We offer a 12-month warranty for the entire machine, covering manufacturing defects. Extended warranty options are available upon request. Our service team provides lifetime technical support, including software updates and troubleshooting.
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