Steel pipe polyethylene 3PE, 2PE anti-corrosion

The surface of the steel pipe is electrostatically sprayed with epoxy powder, and the adhesive is wound laterally, and the polyethylene anticorrosive layer is wound laterally. Combining the excellent performance of the three, the overall quality of the anticorrosive pipeline is significantly improved. It is resistant to chemical corrosion, cathodic disbondment and mechanical damage.

Keywords:

Product Description

2PE/3PE anticorrosive steel pipe

Specification: Ф89mm-Ф3200mm

Material: Q235B, Q345B, 10# steel, 20# steel, X42-X80 grade

Standard: GB/T23257-2017

2PE/3PE anti-corrosion structure:

The surface of the steel pipe is electrostatically sprayed with epoxy powder, and the adhesive is wound laterally, and the polyethylene anticorrosive layer is wound laterally. Combining the excellent performance of the three, the overall quality of the anticorrosive pipeline is significantly improved. It is resistant to chemical corrosion, cathodic disbondment and mechanical damage.

Before the base material of 2PE/3PE anticorrosive steel pipe is subjected to anticorrosion treatment, it is necessary to inspect and record the steel pipe entering the pipe inlet platform, perform shot blasting to remove rust on the outer surface of the steel pipe, and then check whether the cleanliness and anchor depth of the outer surface of the steel pipe are consistent Requirements, if it does not meet the requirements, it is qualified by hand-grinding and repairing. Wrap tape on the end of the pipe, treat it with fine dust, heat it to the required temperature at medium frequency, spray epoxy powder, wind on the side of the adhesive extruder, and wind on the side of the PE extruder. Water cooling of the anticorrosive pipes, spray marking of qualified products, and the down-pipe platform and stacking are to be shipped.

The 3PE anticorrosive steel pipe has a wide range of applications, and it is suitable for underground coal mine water supply and drainage, underground spraying, positive and negative pressure ventilation, gas drainage, fire sprinkler and other pipe networks. Process water waste residue and return water conveying pipeline in thermal power plant. It has excellent applicability to the water supply pipeline of anti-sprinkling and sprinkling system. Cable protection sleeves for power, communications, highways, etc. It is suitable for high-rise building water supply, heating network heating, tap water engineering, gas transportation, buried water transportation and other pipelines. Process pipelines for transporting corrosive media in industries such as petroleum pipelines, chemical pharmacy, printing and dyeing industries. Sewage treatment discharge pipes, sewage pipes and biological pond anticorrosion projects. For agricultural irrigation pipes, deep well pipes, drainage pipes and other networks, it can be said that 3PE anticorrosive steel pipes are indispensable in the current construction, and it is believed that through the extension of science and technology, it will have more brilliant achievements in the future.

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.

Product Inquiry

Please provide your phone number and email address. This will help us contact you promptly and resolve your issue as soon as possible.