Anti-Corrosive Polyethylene Inner Wrap Tape
Size: 6" × 400 ft | Color: Black | Primary Corrosion Protection Layer
Product Overview
Our Anti-Corrosive Polyethylene Inner Wrap Tape is a heavy-duty, cold-applied protective tape designed as the primary corrosion barrier in pipeline coating systems. Manufactured with a tough polyethylene backing and a high-performance adhesive layer, this tape provides a continuous, watertight seal that protects steel pipelines, field joints, and fittings from external corrosion, moisture ingress, and mechanical damage.
Supplied in a large-format 9-inch width × 400-foot length roll and finished in black, this inner wrap tape is engineered for efficient coverage of large-diameter pipelines and extended joint sections, reducing the number of rolls required and minimizing field splices.
Product Specifications
| Parameter |
Specification |
| Product Type |
Anti-corrosive inner wrap tape |
| Backing Material |
Polyethylene (PE) |
| Dimensions |
6" (Width) × 400 ft (Length) |
| Color |
Black |
| Application Position |
Inner wrap (primary corrosion barrier) |
| Application Method |
Cold-applied, spiral wrap |
Key Features & Benefits
| Feature |
Benefit |
| Polyethylene Backing |
Excellent moisture resistance, chemical resistance, and mechanical durability |
| Anti-Corrosive Adhesive |
Bonds firmly to steel and compatible coatings, forming a continuous corrosion barrier |
| 6" × 400 ft Large Format |
Covers more surface per roll, reducing field splices and installation time on large-diameter pipes |
| Black Color |
Standard for pipeline protection; UV-stable and suitable for exposed conditions |
| Watertight Seal |
Prevents moisture and water ingress at field joints and repaired areas |
| Cold-Applied |
No heat or specialized equipment required; suitable for field application |
| Conformable |
Adapts to pipe curvature and irregular surfaces when applied with proper tension |
System Integration
The Anti-Corrosive Polyethylene Inner Wrap Tape is designed as the first protective layer in a multi-layer pipeline coating system. Typical system configuration:
| Layer |
Product |
Function |
| 1 (innermost) |
PE Inner Wrap Tape (this product) |
Primary corrosion barrier; bonds to steel and plant coating |
| 2 |
PE Outer Wrap Tape |
Mechanical protection; additional moisture barrier |
| 3 (optional) |
Outerwrap / Topcoat |
UV protection and abrasion resistance for exposed environments |
The inner wrap tape is applied directly to the prepared steel surface and overlapping onto the adjacent plant coating, creating a continuous bond across the joint or repair zone.
Typical Properties (Reference)
| Property |
Typical Value |
| Backing Material |
Polyethylene (PE) |
| Total Thickness |
0.3 – 0.8 mm (product-dependent) |
| Width |
9 inches (228.6 mm) |
| Length |
400 ft (121.9 m) |
| Color |
Black |
| Adhesive Type |
Anti-corrosive mastic / butyl-based adhesive |
| Service Temperature |
Standard pipeline service range |
| Water Vapor Transmission |
Very low |
| Dielectric Strength |
> 15 kV/mm |
Values are indicative and shall be confirmed against the specific CNPetro product data sheet.
Primary Applications
Pipeline field joints – Girth welds, tie-ins, and repair areas
Large-diameter pipelines – The 9" width is ideal for efficient coverage of large-circumference joints
Buried and submerged pipelines – Onshore and offshore environments
Coating rehabilitation – Repair of damaged PE, FBE, and bitumen coatings
Fittings and connections – Valves, flanges, and irregular geometries (with profiling compound where required)
Water and gas transmission lines – External corrosion protection
Application Summary
Surface Preparation: Clean the steel surface to remove loose rust, dirt, oil, and contaminants. Surface should be dry and frost-free.
Apply Primer (if specified): Apply a compatible primer to the prepared surface and allow to dry.
Apply Inner Wrap Tape: Starting at one end, apply the tape spirally around the pipe with the specified overlap (typically 50%), pressing firmly to ensure intimate contact and eliminate air pockets.
Overlap onto Plant Coating: Extend the tape onto the adjacent sound plant coating to create a continuous sealed barrier.
Apply Outer Wrap (if specified): Install the outer wrap tape over the inner wrap for mechanical protection.
Inspect: Verify complete coverage, sealed edges, and proper overlap. No curing time is required before backfill.
Packaging and Availability
| Item |
Details |
| Roll Dimensions |
6" × 400 ft |
| Color |
Black |
| Packaging |
Individually wrapped rolls in cartons |
| Customization |
Other widths, lengths, and thicknesses available on request |
For product data sheets, samples, or technical consultation, please contact our sales team.
Keywords: anti-corrosive inner wrap tape, polyethylene tape, 9 inch × 400 ft, black pipeline tape, corrosion protection tape, field joint coating, PE inner wrap, pipeline wrapping tape
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