Steel Skeleton Reinforced Polyethylene Pipe For Oil Gas Transmission

Product Specification

High Rigidity Steel Skeleton Reinforced PE Composite Pipe for Oil and Gas Field Transmission

The Steel Skeleton Reinforced Polyethylene (PE) Composite Pipe is a high-performance, multi-layer composite piping system engineered for demanding oil and gas field applications. It features a high-strength, three-dimensional rigid skeleton formed by punched, rolled, and longitudinally welded steel mesh strips, which is seamlessly encapsulated within premium high-density polyethylene (HDPE) matrixes.

Unlike conventional composite pipes that rely solely on adhesive resins, this pipeline utilizes a unique mechanical interlocking structure. During the extrusion process, the molten plastic flows through the perforations of the steel skeleton, fusing the inner and outer PE layers into a single, virtually inseparable unit. This structural synergy perfectly combines the pressure-bearing capacity of steel with the exceptional corrosion resistance of HDPE against produced water, hydrocarbons, and downhole chemicals commonly encountered in oil and gas operations.

Advantages

• Exceptional Rigid-Flexible Balance and Dimensional Stability The welded steel skeleton provides the pipe with outstanding rigidity and structural integrity, drastically reducing thermal expansion and contraction compared to pure plastic pipes. This dimensional stability is critical for long-distance oil and gas transmission lines subjected to wide temperature fluctuations.

• Superior Anti-Delamination and Peel Strength Thanks to the continuous punched-steel matrix, the inner and outer plastic layers form a highly stable, mechanical interlocking system through the holes. This structural design ensures zero delamination under high-pressure gas surges and maintains reliable sealing integrity throughout the pipeline's service life.

• Outstanding Corrosion and Scale Resistance The outer and inner linings are composed of inert high-density polyethylene, which effectively resists corrosion from produced water, CO2, H2S, and aggressive chemicals used in oilfield operations. The ultra-smooth inner surface prevents scale buildup, paraffin deposition, and bio-growth, maintaining long-term flow efficiency.

• Reliable and Leak-Proof Joining System The pipeline primarily utilizes Electrofusion (EF) connections or customized flange joints. The electrofusion process creates a homogenous bond between the pipe and the fittings, ensuring joints are as strong as or stronger than the pipe itself, guaranteeing a 100% leak-free system for environmentally sensitive oilfield applications.

• Long Service Life and Low Maintenance Engineered to endure harsh oilfield environments, the pipe is immune to electrochemical corrosion and offers a design service life of over 50 years under standard operating conditions, significantly reducing lifecycle and maintenance costs for energy infrastructure.

Applications

Given its robust structural properties and superior corrosion resistance, this pipe is widely adopted across the oil and gas sector:

• Crude Oil Gathering Systems: Transporting crude oil from wellheads to central processing facilities and storage terminals.

• Produced Water Injection Lines: High-pressure water injection pipelines for enhanced oil recovery and reservoir pressure maintenance.

• Natural Gas Transmission: Low to medium pressure gas gathering and distribution networks within oilfield operations.

• Long-Distance Municipal Water Transmission: High-pressure water supply, fire protection loops, and cross-country water conveyance projects.