Install it once. Forget about rust. Built for the underground.
Underground infrastructure faces a dual threat: the crushing weight of soil loads and the silent destroyer—corrosion. Traditional steel pipes require expensive coatings and cathodic protection, yet they still fail. Concrete pipes crack and leak.
Qingdao Chengda Huili New Materials Co., Ltd. provides the ultimate alternative: Glass Fiber Reinforced Polymer (GRP/FRP) Piping Systems. Engineered specifically for buried applications, our pipes combine the structural strength of rock with the chemical resistance of high-grade resin, ensuring your pipeline lasts 50+ years with virtually zero maintenance.
Our "Glass Piping" systems are manufactured using advanced filament winding technology, creating a dense composite structure that outperforms metal and concrete in harsh soil conditions.
100% Anti-Corrosion: Inherently resistant to acidic soil, saltwater, stray electrical currents, and corrosive fluids. No expensive cathodic protection or external wrapping is ever needed.
Superior Hydraulic Efficiency: The mirror-smooth glass-resin inner surface minimizes friction loss, allowing for lower pumping costs or smaller pipe diameters compared to steel/concrete.
High Stiffness Design: Engineered with specific Stiffness Classes (SN) to withstand deep burial loads and heavy traffic passing overhead without deformation.
Leak-Free Joints: Our precision Bell & Spigot or Mechanical coupling systems ensure a watertight seal, preventing groundwater contamination or infiltration.
We tailor our pipes to your project’s specific depth, pressure, and fluid requirements.
| Parameter | Specification Range |
| Material Composition | E-Glass Fiber Roving + Thermosetting Resin (Polyester/Vinyl Ester) + Silica Sand |
| Diameter (DN) | 25mm (1") up to 4000mm (157") |
| Pressure Class (PN) | Gravity (PN1) up to High Pressure (PN32 / 32 Bar) |
| Stiffness Class (SN) | SN2500, SN5000, SN10000 N/m² (ISO 10467) |
| Temperature Rating | -40°C to +120°C (Depending on resin) |
| Standard Lengths | 6m, 12m (Reduces installation joints) |
| Standards | API 15LR, ASTM D2996, ISO 14692, AWWA C950 |
Qingdao Chengda Huili piping systems are the backbone of critical underground networks:
Municipal Water & Sewer: Potable water transmission and sewage interceptors.
Oil & Gas Gathering: Flow lines for crude oil and brine water (highly corrosive).
Industrial Firewater Mains: Buried fire loops that must not rust or clog (FM Approved designs available).
Chemical Effluent: Safe transport of industrial acids and waste to treatment plants.
Desalination Plants: Seawater intake and outfall lines.
Installation Advantage: Being 1/4 the weight of ductile iron, our pipes allow for faster installation with lighter excavators, significantly reducing your civil engineering costs.
Precision Engineering: We calculate the exact wall thickness needed for your burial depth to ensure safety without over-engineering costs.
Resin Selection: From standard Isophthalic resin for water to premium Vinyl Ester for aggressive chemicals, we match the material to your fluid.
Complete Fittings: We supply all necessary elbows, tees, flanges, and reducers for a complete system.
Stop digging up rusty pipes. Switch to the corrosion-free standard of the future.
Contact our engineering team for a quote:
? info@composites-factory.com
Contact：
Phone：+8615963283577
E-mail：info@composites-factory.com
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