OEM UHMWPE pipe Supplier, Factories

Product Description

UHMWPE Pipe Overview

Ultra-high molecular weight polyethylene (UHMW-PE) pipe is a new type of plastic pipe that is wear-resistant, impact-resistant, corrosion-resistant, non-absorbent and self-lubricating. It is widely applied across various fields:

1. Oil Transportation

Resists harsh acidic soil, seawater, and internal sulfur-containing oil. Handles high viscosity crude oil efficiently and improves pipeline transmission and lifespan.

2. Grouting Filling Pipe

Used for tailings water grouting filling, ground drilling, and high-pressure reinforcement to mitigate surface subsidence and improve project economics.

3. Chemical Industry

Transports highly corrosive media like strong acids, alkalis, brine, salt slurry, and raw salt in the chemical sector.

4. Dredging Projects

Transports sediment in dredging projects across rivers, lakes, ports, and docks.

5. Ocean Engineering

Suitable for seawater transportation in seawater desalination systems.

6. Municipal Engineering

Applied in sewage treatment, domestic water supply, and gas or natural gas transmission.

7. Mechanical Parts

Processed into wear-resistant bearing bushes, sliding bearings, bushings, rollers, and gaskets to replace metal parts.

8. Grain Conveying

Hygienic, non-toxic, wear-resistant, and cost-effective pipeline solution preventing blockage during high-speed conveying.

Lining Technology: UHMWPE oil well lining pipe is an alloy material based on high molecular polymer. Lined tubing reduces sucker rod and tubing wear, limits downhole failures, improves anti-corrosion performance, and extends the pump inspection cycle and overall service life.

Working Principle

1
UHMWPE oil well liner utilizes sucker rod righting technology (including nylon centralizers and roller couplings) to isolate the sucker rod from the oil pipe, avoiding contact wear.
2
It ensures uniform wear of the oil pipe and sucker rod by applying the rotation principle. Rotating wellheads adjust the contact surface during production, extending string life.
3
Maintains the oil pipe and sucker rod in a stretched state, reducing eccentric wear caused by instability or creep. This incorporates anchoring, weighting, and hydraulic feedback technologies.
4
Features an anti-wear pair (polished rod, centering sleeve, and anti-bending joint). The polished rod is ground and chrome-plated, while the sleeve is lined with reinforced nylon 66, converting tube wear into localized, low-friction slider wear.

Product Features

High Wear Resistance

Molecular weight exceeds 2 million, yielding low sliding friction. Wear resistance is 6.6 times higher than alloy steel and 27.3 times higher than stainless steel.

High Impact Resistance

Exhibits high impact toughness (GB1843 standard). Resists damage from severe external impact, internal overload, and high pressure fluctuations.

Corrosion Resistance

Saturated molecular structure prevents chemical corrosion. Remains stable in under 80% hydrochloric acid, 75% sulfuric acid, and 20% nitric acid.

Good Self-Lubrication

Friction coefficient is only 0.219MN/m (GB3960). Excellent dry lubrication performance prevents wear and strain in dusty, sediment-heavy environments.

Low Temperature Resistance

Maintains impact and wear resistance at -269°C. It is capable of stable, long-term operation within a temperature range of -269°C to 80°C.

Scale Resistance

Low friction and non-polarity prevent scaling even in media with a pH level above 9. Ideal for transporting crude oil and mud.

Long Service Life

Boasts high fatigue resistance (over 500,000 cycles) and environmental stress cracking resistance (>4000h). Retains over 70% mechanical strength after 50 years buried.

Easy Installation

Weighs only one-eighth of steel pipes, reducing labor. Safe, reliable, and convenient connection via welding or flanging without anti-corrosion treatments.

Other Key Properties

Features high energy and noise absorption, antistatic behavior, electronic shielding ability, non-absorption, and light specific gravity.

Scope of Application

  • Oil production wells: Prevents wear, waxing, scaling, and corrosion.
  • Water injection wells: Handles high scaling and severe corrosion.
  • Delivery pipes: Reuses old corroded or worn oil pipes as lined delivery pipes.
  • Corrosive gas wells: Resists aggressive H2S and CO2 gases.
  • Offshore oil wells: Lowers maritime production costs through long service life.

Frequently Asked Questions (FAQ)

What are the core performance advantages of UHMWPE pipes?

UHMWPE pipes offer exceptional wear resistance, high impact toughness, chemical corrosion resistance, self-lubrication, anti-scaling properties, and unique stability at extreme temperatures (from -269°C to 80°C).

How does UHMWPE lining prevent sucker rod and tubing wear in oil wells?

It isolates the sucker rod from direct contact with the oil pipe using a low-friction anti-wear pair. System rotation and anchoring technologies are also implemented to guarantee uniform wear distribution and keep components properly tensioned.

Can UHMWPE pipes handle corrosive chemicals and high scaling fluids?

Yes. UHMWPE is highly chemically stable and saturated, resisting strong acids and alkalis. Its non-polar surface and low friction coefficient effectively prevent scaling even when conveying fluids with a pH level above 9.

What is the expected service life of a UHMWPE pipeline?

Buried UHMWPE pipelines can serve for approximately 50 years while maintaining over 70% of their mechanical properties due to their exceptional fatigue resistance and environmental stress cracking resistance.

Is the installation process of UHMWPE pipes complicated?

No. UHMWPE pipes are very lightweight (about 1/8 of the weight of steel pipes), simplifying transportation and handling. They can be installed above ground or buried, and connected securely via flanged joints or welding without extra anti-corrosion coatings.

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