External Polyethylene Cold Wrapping Tape for Corrosion Protection of Bent Pipes

The anti-corrosion system for polyethylene anti-corrosion adhesive tapes consists of an anti-corrosion tape, a protective tape, a joint-repair tape, and a primer. The adhesive tape itself is a strip-shaped anti-corrosion material produced by co-extrusion, comprising a polyethylene-based film with a layer of adhesive applied via hot lamination—this adhesive layer is primarily composed of butyl rubber. It features excellent insulation properties, superior anti-corrosion performance, high mechanical strength, resistance to impact and aging, low water absorption, ease of installation, safety and hygiene, a wide range of applications, and a long service life.

Product Description

Bent-pipe polyethylene anti-corrosion adhesive tape for corrosion protection: Production and processing range from ΦDN80 to DN1800.

Product Introduction

The anti-corrosion system for polyethylene anti-corrosion adhesive tapes consists of an anti-corrosion tape, a protective tape, a joint-repair tape, and a primer. The adhesive tape itself is a strip-shaped anti-corrosion material produced by co-extrusion of a polyethylene-based film with a layer of adhesive primarily composed of butyl rubber, which is thermally laminated onto the film. It features excellent insulation properties, outstanding anti-corrosion performance, high mechanical strength, resistance to impact and aging, low water absorption, ease of construction, safety and hygiene, a wide range of applications, and a long service life. It is widely used for highly effective, long-lasting external corrosion protection of metal pipelines in various pipeline projects and facilities, including those for oil, natural gas, petrochemicals, power generation, metallurgy, urban gas networks, and water supply systems. It is also extensively applied for external corrosion protection of buried metal pipelines in petrochemical, natural gas, coal, and other related projects.

Product Features

Reinforced Polyethylene Adhesive Tape for Pipeline Anti-Corrosion—Reinforced Grade: Composite polyethylene anti-corrosion tape, reinforced-grade polyethylene adhesive tape, polyethylene anti-corrosion adhesive tape, polyethylene cold-wrap tape—commonly referred to as "reinforced-grade tape," polyethylene adhesive tape, polyethylene tape, POLYETHYLENE TAPE—also known as pipeline anti-corrosion tape, anti-corrosion tape, cold-wrap tape, PE anti-corrosion tape, PE TAPE, and IDEAL TAPE. The product performance meets the standards of similar international products, and its quality indicators comply with the requirements of U.S. AWWA C214 and the national standard SY/T0414-2007.

The product features the characteristics of cold-applied tape, offering convenient construction, zero environmental pollution, excellent corrosion resistance, long service life, and low overall costs. It is widely used for external corrosion protection of steel pipelines in pipeline projects such as oil and gas, petrochemicals, urban gas, power and water supply, metallurgy, and shipbuilding.

Polyethylene anti-corrosion cold-wrap tapes are further classified into composite anti-corrosion tapes and polyethylene-modified bitumen anti-corrosion tapes, depending on the material composition and anti-corrosion structure of the product.

The polyethylene-modified asphalt anti-corrosion tape consists of a polyethylene substrate, modified high-viscosity asphalt, and a release liner. This tape features a thick adhesive layer, easy winding, non-slip properties, and high viscosity. A single-layer wrap of this tape can meet the requirements of either the standard or enhanced-level anti-corrosion specified in SY/T0414-2007. By eliminating the need for multiple layers of traditional tapes, this product reduces the impact of human factors on anti-corrosion quality during the application process and lowers construction costs.

Recommended Products

Steel pipe polypropylene 3PP anti-corrosion

2PP/3PP Anti-corrosion Steel Pipe Specifications: Φ89mm–Φ3200mm Material: Q235B, Q345B, 10# Steel, 20# Steel, Grades X42–X80 Standards: SY/T7041-2016, DIN30678 Advantages of the Anti-corrosion Coating The three-layer polyethylene anti-corrosion coating combines the excellent properties of both epoxy coatings and extruded polyethylene coatings. It integrates the interfacial characteristics and chemical resistance of epoxy coatings with the mechanical protection features of extruded polyethylene coatings, significantly enhancing the performance of each component. Therefore, it serves as an outstanding external protective layer for buried pipelines. According to relevant data, the three-layer PE coating can extend the service life of buried pipelines up to 50 years and is currently recognized internationally as one of the most advanced pipeline external anti-corrosion technologies. In 3PE anti-corrosion systems, the three-layer PE coating has been first applied in oil and gas systems. The Shaanxi-Beijing natural gas pipeline and the Kuerle-Shanshan oil pipeline—both already completed in China—along with the nearly 4,000-kilometer West-to-East Gas Pipeline project, all utilize the three-layer PE external anti-corrosion coating. Additionally, the 67-kilometer high-pressure pipeline from Shaanxi to Tianjin, the 30-kilometer outer ring high-pressure natural gas pipeline, and the 122-kilometer pipeline of the Shaanxi-Beijing underground gas storage facility also employ the three-layer PE coating. As such, the three-layer PE coating has become the leading direction for the future development of external anti-corrosion coatings for pipelines. Applications: The product is widely used in oil pipelines, natural gas pipelines, heating pipelines, and water supply pipelines. Application Scope: Currently, China has not yet established an industry standard for 3PP coatings. Therefore, the 3PP anti-corrosion pipelines produced generally follow the German standard DIN30678 “Polypropylene Coatings for Steel Pipelines.” The 3PP coating is primarily used as an anti-corrosion layer for pipelines transporting media at relatively high temperatures, as well as for pipelines located in desert regions characterized by high surface temperatures and prolonged sunlight exposure. Consequently, it has gained increasingly widespread application on buried water, gas, and oil pipelines in areas with high surface temperatures and long periods of sunlight.

Polyurea anti-corrosion coating for steel pipes

The future development of polyurea-coated anti-corrosion steel pipes: Polyurea coatings represent the international trend in next-generation anti-corrosion technology. Currently, major pipeline companies worldwide have adopted polyurea anti-corrosion coatings—for instance, the oil pipelines in Alaska, USA; the Gulf oil pipeline in Indonesia; the Siberian oil pipeline in Russia; and the water transmission pipelines in Kuwait—all of which use polyurea as their anti-corrosion coating. Superiorities of Polyurea-Coated Anti-Corrosion Steel Pipes: Polyurea-coated anti-corrosion steel pipe materials exhibit excellent construction performance when used for pipeline joints. Typically, straight pipe sections are prefabricated in the factory, while joints are connected on-site via spray application. After polyurea treatment, the pipeline maintains outstanding continuity and integrity, ensuring that the entire pipeline system is completely sealed with no seams, thereby guaranteeing its overall anti-corrosion performance and ultra-long service life. Key Features of Polyurea-Coated Anti-Corrosion Steel Pipes: Fast curing speed, allowing for seamless application on vertical and curved surfaces without sagging; excellent corrosion resistance, capable of withstanding erosion by most chemical media; superior physical properties, providing strong adhesion to metal substrates; 100% solid content, non-polluting, and environmentally friendly; seamless coating, completely eliminating the risk of leakage points. Main Applications of Polyurea-Coated Anti-Corrosion Steel Pipes: Overhead pipelines, directly buried pipelines, oil pipelines, gas pipelines, municipal sewage pipelines, and various types of steel pipelines—both internal and external wall anti-corrosion. Future Development of Polyurea-Coated Anti-Corrosion Steel Pipes: Polyurea coatings represent the international trend in next-generation anti-corrosion technology. Currently, major pipeline companies worldwide have adopted polyurea anti-corrosion coatings—for instance, the oil pipelines in Alaska, USA; the Gulf oil pipeline in Indonesia; the Siberian oil pipeline in Russia; and the water transmission pipelines in Kuwait—all of which use polyurea as their anti-corrosion coating. According to international standards, all underground metal pipelines employ a combined protection approach involving an anti-corrosion coating and cathodic protection. Among these, the pipeline anti-corrosion coating serves as the primary barrier. The 3PE anti-corrosion coating, which integrates the advantages of high-density polyethylene wrapping and fusion-bonded epoxy powder, is now widely used. However, its main drawback—the unresolved issue of joint repairs—remains a challenge. The heat-shrink sleeves currently used do not match well with the 3PE coating, significantly reducing the service life of the system.

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