Why Oil Pipelines Clad with Aluminum Coil Polysurlyn?

Cladding oil pipelines with aluminum coil laminated with Polysurlyn (a high-performance surlyn polymer film) is a standard industry practice for protecting the underlying insulation and the pipe itself. This combination is specifically engineered to combat Corrosion Under Insulation (CUI), which is one of the most expensive and dangerous issues in midstream oil and gas operations.

Common alloy: 3003 / 3105 H14

Common thickness: 0.4mm - 1.2mm

Standard width: 200mm - 1200mm

Laminated film: 3mil(0.076mm) special Polysurlyn moisture barrier film

Here is why this specific material pairing is used:

1. Superior Moisture Barrier (The 3mil Polysurlyn Layer)

Standard aluminum jacketing can sometimes experience "pitting" or galvanic corrosion on its interior surface when moisture gets trapped between the metal and the insulation.

• Zero Permeability: Polysurlyn acts as a moisture-proof shield. Unlike older water-based paints or kraft paper barriers, Polysurlyn is a multi-layer film that does not degrade or peel over time.

• Eliminating Galvanic Cells: It prevents the aluminum from coming into direct contact with wet insulation, which would otherwise create an electrolytic cell and corrode the jacket from the inside out.

2. Resistance to CUI (Corrosion Under Insulation)

CUI occurs when water seeps through the outer cladding and reaches the carbon steel pipe.

• Sealing Integrity: The lamination process ensures there are no pinholes in the barrier. This keeps the insulation dry, maintaining its thermal efficiency and preventing the steel pipe from rusting.

• Chemical Resistance: Polysurlyn is highly resistant to the salts and environmental chemicals often found in refineries and offshore environments.3. Durability and Thermal Performance (The Aluminum Layer)

Aluminum is the preferred outer "skin" for several mechanical reasons:

• Corrosion Resistance: Aluminum naturally forms an oxide layer that protects it from the elements (rain, UV rays, and snow).

• Weight-to-Strength Ratio: It is lightweight, making it easier to install on long pipeline spans, yet rigid enough to protect the fragile insulation (like mineral wool or calcium silicate) from mechanical damage.

• Emissivity: Aluminum has low emissivity, which helps minimize heat gain or loss, ensuring the oil remains at the correct viscosity for transport.

4. Long-Term Cost Efficiency

While the initial cost of Polysurlyn-laminated aluminum is higher than basic kraft-paper-backed cladding, it saves money in the long run:

• Reduced Maintenance: It significantly extends the interval between pipeline inspections and cladding replacements.

• Easy Installation: The material is flexible and resists creasing, allowing for a tighter, more secure fit around elbows and valves.

Comparison of Other Internal Barriers

5. Extreme Weather & Mechanical Durability

- Operates reliably from ‑50°C to 80°C; UV‑resistant for outdoor/coastal installations.

- Stucco‑embossed or smooth surface—high bendability, no cracking during installation.

- Lightweight (3003/3105 alloy, 0.4–1.2mm) yet tough—resists dents, scratches, and installation damage.

6. Oil/Gas Industry Compliance & Safety

- FDA‑compliant for food‑grade oil/gas contact; meets refinery/pipeline specs.

- Non‑flammable, low smoke—safer than plastic/foam barriers in fire‑prone oil facilities.

Some user may ask us, how many years of life warranty by working condition for the pipeslines with aluminum coil polysurlyn cladding?  It's service life will depends on the environments: 

1) Standard industrial working conditions (inland plants, conventional oil & gas pipelines): Designed service life 20-25 years, regular industry warranty is 20 years

2. Mild & dry environment: With standardized installation and regular maintenance, service life can reach over 25-30 years

3. Harsh corrosive environment (coastal salt spray, chemical parks, high humidity & low temperature): Stable service life 15-20 years

Comparative advantage: Its service life is 2-3 times that of ordinary plain aluminum coil and kraft paper laminated aluminum coil, with lower full-cycle operation and maintenance cost.

Summary

Oil pipelines use PSMB aluminum coil because it stops moisture, beats corrosion, keeps insulation working, and lasts decades—the most cost‑effective protection for critical oil/gas infrastructure. Our company is specialized in producing and supplying aluminum rolls jacketing for pipe insulation since ten years ago,  we already export this product to international market regularly, if you are looking for high quality aluminum roll jacketing for pipelines insulation, welcome contact us freely.