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Qingdao Yongke Machinery Co., Ltd., a trusted manufacturer since 2010 with a factory spanning 10,000–30,000 square meters, is proud to introduce our Large Diameter Customized Krah Marine Pipe Machine. This advanced equipment is purpose-built for the production of high-strength, large-diameter HDPE pipes used in offshore intake pipeline manufacturing. Combining Krah spiral winding technology with robust engineering, our machine delivers pipes that meet the demanding requirements of marine environments, including seawater intake, cooling water systems, and desalination plants. With a team of 51–100 skilled employees and annual export value of US$1–1.5 million, we ensure each machine is crafted to deliver reliable performance and long service life.
Our Krah Marine Pipe Machine offers unmatched customization – from pipe diameter and wall thickness to color and coating – allowing you to produce pipes perfectly tailored to your project specifications. Whether you need pipes for subsea outfalls or intake lines, this machine provides the flexibility and precision required for offshore applications.
Key Features & Technical Specifications
- Proven Krah Technology: Uses spiral wound, rib-reinforced HDPE pipe manufacturing method for superior ring stiffness and pressure resistance.
- Large Diameter Capacity: Capable of producing pipes from 300 mm up to 4000 mm or more, depending on configuration.
- High Output Efficiency: Automated PLC control system ensures consistent quality and reduces labor costs.
- Marine-Grade Materials: Compatible with HDPE resins that offer excellent corrosion resistance, UV stability, and impact strength.
- Customizable Tooling: Molds and dies can be tailored for specific pipe dimensions, joining methods (e.g., electrofusion), and end finishes.
- Energy-Saving Design: Optimized heating and cooling systems minimize power consumption.
- Easy Installation & Maintenance: Modular construction allows quick setup on-site; after-sales technical support available globally.
| Parameter | Specification |
|---|---|
| Pipe Diameter Range | 300 mm – 4000 mm (customizable) |
| Production Speed | 0.2 – 1.5 m/min (depends on diameter) |
| Wall Thickness | Up to 60 mm |
| Ring Stiffness | SN4 – SN16 (per EN ISO 9969) |
| Power Supply | 380V / 50Hz (customizable) |
| Control System | PLC + Touchscreen (Siemens/Omron optional) |
| Machine Dimensions (L×W×H) | 35m × 6m × 4m (approx., configurable) |
Benefits for Your Offshore Projects
- Reduced Installation Costs: Large-diameter pipes with high ring stiffness allow longer spans and fewer supports underwater.
- Long Service Life: HDPE pipes resist corrosion, chemical attack, and marine growth, ensuring 50+ years of operation.
- Fast Production: Our machine's efficient Krah process enables rapid manufacturing to meet tight project timelines.
- Low Maintenance: Smooth inner surface minimizes friction loss and reduces pumping energy.
- Environmentally Friendly: HDPE is 100% recyclable; production process has low carbon footprint.
Why Choose Qingdao Yongke?
With 13 years of experience in machinery manufacturing, ISO9001, ISO14000, and OHSAS18001 certifications, and a factory covering 10,000–30,000 sqm, we are a reliable partner for global clients. Our equipment has been exported to North America, South America, Europe, Asia, Africa, Oceania, and the Middle East, serving industries such as water supply, drainage, and marine engineering. Every Krah Marine Pipe Machine undergoes rigorous quality testing before shipment from the port of Qingdao. We offer comprehensive after-sales support, including installation guidance, training, and spare parts supply.
Contact us today to discuss your project requirements and request a tailored quotation. Let Qingdao Yongke be your trusted partner in offshore pipeline manufacturing.
Frequently Asked Questions
Q1: What is the maximum pipe diameter your Krah Marine Pipe Machine can produce?
A: The machine can be customized to produce pipes up to 4000 mm in diameter. Larger diameters are available upon request, depending on tooling configuration.
Q2: Can the machine produce pipes with different wall thicknesses for varying pressure ratings?
A: Yes, the wall thickness is adjustable from 10 mm up to 60 mm, allowing you to achieve ring stiffness classes from SN4 to SN16 or custom requirements.
Q3: What materials are compatible with this Krah machine?
A: The machine is primarily designed for HDPE (PE80, PE100) resins. Other thermoplastic materials such as PP or PVC are also possible after consultation with our engineers.
Q4: Do you provide installation and training services for overseas customers?
A: Absolutely. We offer on-site installation supervision, commissioning, and training for your operators. Remote technical support is also available via video call.
Q5: How long is the lead time for a customized Krah Marine Pipe Machine?
A: Standard lead time is approximately 60–90 days after order confirmation, depending on customization complexity. Urgent orders can be discussed.
Q6: What certifications does your machine hold?
A: Our factory management system is certified to ISO9001, ISO14000, and OHSAS18001. The machine can also be manufactured to meet CE or other international standards upon request.
Q7: Is it possible to produce pipes with integrated joints (e.g., bell-socket ends)?
A: Yes, we can customize the winding mandrel and cutting system to create spigot/socket ends or prepare the pipe for electrofusion coupling.
Q8: What spare parts do you recommend keeping in stock?
A: We recommend stocking a set of extrusion dies, heating elements, and PLC modules. Our team will provide a detailed spare parts list after purchase.
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