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High Ring Stiffness HDPE Krah Pipe for Underground Sewer Projects
Product Spotlights
High ring stiffness HDPE Krah pipe featuring a unique hollow-wall structure for superior load-bearing capacity in underground sewer applications. Offers excellent chemical resistance, long lifespan (>50 years), and lightweight design for easier installation. Customizable diameters (200-3000mm) and stiffness classes (SN4-SN16). Manufactured under ISO 9001, 14000, and OHSAS 18001 certified processes, ensuring reliable quality for global infrastructure projects.
Negotiable
MOQ: 1 Set (Price negotiable depending on order volume and customization)
Key Specifications
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Material:
High-Density Polyethylene (HDPE)
Ring Stiffness Class (SN):
SN4 to SN16 (Customizable)
Diameter Range:
DN/ID 200mm to 3000mm (Available upon request)
Payment & Shipping
Payment Methods:
Port of Shipment:
Qingdao
Delivery Detail:
30 days
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Material
High-Density Polyethylene (HDPE)
Ring Stiffness Class (SN)
SN4 to SN16 (Customizable)
Diameter Range
DN/ID 200mm to 3000mm (Available upon request)
Wall Structure
Multi-layer, hollow-wall (Krah technology)
Application
Underground sewer and drainage projects
Connection Type
Spigot and socket, electrofusion, butt welding
Standard Compliance
ISO 9001, ISO 14000, OHSAS 18001 (Company certifications)
Color
Black (Standard), other colors optional
Length
Standard 6m or 12m, customizable
As a leading manufacturer with over a decade of expertise in polymer pipe systems, Qingdao Yongke Machinery Co., Ltd. proudly presents our High Ring Stiffness HDPE Krah Pipe, engineered specifically for the demanding requirements of underground sewer infrastructure. Operating from our expansive 10,000-30,000 square meter facility, we combine advanced Krah production technology with stringent quality controls to deliver pipes that offer exceptional structural integrity, long-term performance, and cost-effectiveness for municipal and industrial sewer projects worldwide.
Our HDPE Krah Pipe is designed to withstand the substantial earth loads and dynamic traffic pressures encountered in buried applications. Its unique hollow-wall structure, produced through the Krah winding process, creates a lightweight yet incredibly rigid profile, ensuring reliable service life and minimizing the risk of deformation or collapse. This makes it an ideal, durable solution for gravity sewer systems, stormwater drainage, and other critical underground conduits.
Core Product Features & Technical Advantages:
- Superior Structural Strength: The patented Krah manufacturing process results in a multi-layer, hollow-wall profile that delivers high ring stiffness (SN ratings), providing excellent resistance to external loads without the need for excessive material usage.
- Exceptional Durability & Chemical Resistance: Made from premium-grade HDPE, the pipe is highly resistant to abrasion, corrosion, and chemical attack from aggressive soils and sewage, ensuring a maintenance-free lifespan exceeding 50 years.
- Lightweight & Easy Installation: Compared to traditional concrete or clay pipes, our HDPE Krah pipes are significantly lighter, reducing transportation costs, handling risks, and installation time. They can be joined using various reliable methods.
- Hydraulic Efficiency: The smooth inner surface minimizes friction loss, improving flow capacity and reducing the potential for blockages and sediment buildup.
- Environmental Sustainability: HDPE is a recyclable material, and the efficient use of material in the Krah structure aligns with sustainable construction practices. Our production processes are managed under ISO 14000 environmental standards.
Key Technical Specifications:
| Parameter | Specification / Range |
| Standard Diameter (Inner) | DN/ID 200mm to 3000mm |
| Ring Stiffness (SN) | SN4, SN8, SN12, SN16 (Customizable) |
| Standard Length | 6 meters or 12 meters |
| Material | High-Density Polyethylene (HDPE) PE100/PE80 |
| Connection Types | Spigot and Socket, Electrofusion Couplings, Butt Welding |
| Color | Black (Standard), other colors available |
Benefits for Your Project:
- Reduced Total Cost of Ownership: Lower installation costs, minimal maintenance, and long service life translate to significant savings over the project lifecycle.
- Enhanced Project Reliability: High resistance to ground movement and seismic activity reduces the risk of pipeline failure and associated repair costs.
- Flexibility in Design: Available in a wide range of diameters and stiffness classes to meet specific project specifications and soil conditions.
- Global Supply Capability: With an annual export value of US$1-1.5 Million and shipments from Qingdao port, we reliably serve major markets across North and South America, Europe, Asia, Africa, and Oceania.
Choosing Qingdao Yongke Machinery means partnering with an established manufacturer backed by ISO9001 quality management, ISO14000 environmental management, and OHSAS18001 occupational health and safety certifications. Our dedicated team of 51-100 professionals ensures every pipe meets rigorous production standards. For your next underground sewer or drainage project, opt for a pipe solution that combines proven Krah technology with manufacturing excellence. Contact us today to discuss your requirements, request samples, or receive a detailed quotation tailored to your needs.
Frequently Asked Questions (FAQ)
-
Q: What is the main advantage of Krah pipe over solid-wall HDPE pipe?
A: The Krah process creates a hollow-wall structure, offering a superior stiffness-to-weight ratio. This means it can achieve high ring stiffness (e.g., SN8, SN16) with less material, making it lighter, more cost-effective for large diameters, and easier to handle while maintaining structural performance. -
Q: How is the pipe joined on-site?
A: Multiple reliable joining methods are available, including spigot-and-socket connections with integrated seals for quick installation, electrofusion for creating strong, leak-proof joints, and butt welding for creating continuous pipelines. The choice depends on project specs and installer preference. -
Q: What is the typical lifespan of this HDPE Krah pipe in sewer applications?
A: When installed correctly, HDPE pipes are known for their exceptional durability. Our pipes are designed for a service life exceeding 50 years, thanks to HDPE's resistance to corrosion, chemical attack, and abrasion. -
Q: Can you produce custom diameters and stiffness classes?
A: Yes. While our standard range is from DN 200mm to 3000mm, we have the capability to customize diameters and ring stiffness (SN values) upon request to meet specific engineering designs and load-bearing requirements. -
Q: Is the pipe suitable for deep-burial applications?
A: Absolutely. The high ring stiffness classes (like SN12 and SN16) are specifically engineered to withstand the high external pressures encountered in deep-burial installations for sewer and drainage systems. -
Q: Do you provide technical support or installation guidance?
A: As a manufacturer, we provide detailed product datasheets, technical manuals, and can offer guidance on installation best practices. For complex projects, further engineering support can be arranged. -
Q: What quality certifications does your production process hold?
A: Our manufacturing operations are certified under ISO 9001 for quality management, ISO 14000 for environmental management, and OHSAS 18001 for occupational health and safety, ensuring consistent product quality and responsible manufacturing. -
Q: What are the main markets you export to?
A: We have extensive export experience, with our products successfully supplied to markets including North America, South America, Eastern and Western Europe, Southeast Asia, Africa, Oceania, and the Middle East.
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1Yr
Business Type
Manufacturer
Year Established
2010
Factory Size
10,000-30,000 square meters
Annual Export Value
US$1 Million - US$1.5 Million
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