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3PE (Three-Layer Polyethylene) Coated Steel Pipe is a high-performance anti-corrosion steel pipe, which is based on HFW steel pipe or LSAW steel pipe as the base pipe, and is coated with a three-layer composite anti-corrosion structure through professional processing technology. The three-layer structure is composed of an inner fusion-bonded epoxy (FBE) layer, a middle adhesive layer and an outer polyethylene (PE) layer. It integrates the excellent adhesion of epoxy resin, the good bonding performance of the adhesive and the wear resistance, impact resistance and anti-aging performance of polyethylene, forming a comprehensive anti-corrosion protection system. It is widely used in long-distance pipeline transportation, municipal engineering and other fields that have high requirements for anti-corrosion and service life.
2.1 Superior Anti-Corrosion Performance: The three-layer composite structure forms a dense barrier, which can effectively isolate the base pipe from soil, water, air and chemical media, preventing corrosion, rust and erosion, and fundamentally extending the service life of the steel pipe.
2.2 Strong Adhesion: The inner FBE layer is closely bonded to the steel pipe surface after high-temperature melting, the middle adhesive layer firmly connects the FBE layer and the outer PE layer, and the overall bonding strength is high, which is not easy to peel off or fall off even under harsh construction and service conditions.
2.3 Excellent Mechanical Properties: The outer PE layer has good toughness, wear resistance and impact resistance, which can effectively protect the pipe from external mechanical damage during transportation, installation and use; the inner FBE layer has high hardness and scratch resistance.
2.4 Good Weather Resistance & Anti-Aging: It can adapt to various harsh environments such as high temperature, low temperature, humidity and strong UV radiation, with stable performance, no cracking, no aging, and long-term anti-corrosion effect.
2.5.Environmentally Friendly & Non-Toxic: The raw materials of the 3PE coating are non-toxic, odorless and in line with environmental protection standards, which will not pollute the conveyed medium (such as water, oil, natural gas) and the surrounding environment.
2.6 Easy Construction: The surface of the 3PE coating is smooth, which reduces the friction resistance during pipeline transportation and installation; it can be directly welded, and the joint can be treated with matching 3PE repair materials to ensure the integrity of the anti-corrosion system.
Product Name | 3PE Coated Steel Pipe (Three-Layer Polyethylene Coated Steel Pipe) |
Base Pipe Type | HFW Steel Pipe, LSAW Steel Pipe |
Outer Diameter (OD) | 114.3mm-1219mm |
Wall Thickness (WT) | 3mm-40mm |
3PE Coating Thickness | FBE Layer: 100–300μm; Adhesive Layer: 100–200μm; PE Layer: 1.5–5.0mm (customizable according to requirements) |
Base Pipe Steel Grade | GRADE B,X42–X70,S275-S460,L245-L485 |
Execution Standards | DIN30670,CSA Z245,ISO21809,SY/T0413 |
Coating Material | Inner Layer: Fusion-Bonded Epoxy (FBE); Middle Layer: Copolymer Adhesive; Outer Layer: High-Density Polyethylene (HDPE) |
Testing Method | Adhesion Test, Impact Test, Cathodic Peel Test, Hydrostatic Test, Ultrasonic Flaw Detection |
Length | 6m-13m |
End Type | Plain End, Beveled End, Flange Connection, Threaded End (customizable) |
Service Temperature | -40℃-80℃ |
4.1 Long Service Life: The 3PE coating provides comprehensive anti-corrosion protection, which can make the service life of the steel pipe reach 30–50 years, far longer than that of ordinary painted or galvanized steel pipes, reducing the cost of pipeline maintenance and replacement.
4.2 Comprehensive Anti-Corrosion Protection: Compared with single-layer or double-layer anti-corrosion coatings, the three-layer structure complements each other, not only resisting chemical corrosion and electrochemical corrosion, but also isolating physical erosion, suitable for various harsh working environments (such as saline-alkali soil, wetland, coastal areas, chemical industrial areas).
4.3 Cost-Effective: Although the initial investment of 3PE coated steel pipe is slightly higher, its long service life, low maintenance cost and no need for frequent replacement make it have obvious cost advantages in the long run, especially suitable for large-scale and long-distance pipeline projects.
4.4 Strong Adaptability: It can be customized according to different base pipe specifications, coating thicknesses and end types to meet the needs of different fields and projects; it can adapt to a wide temperature range and various complex geological and environmental conditions.
4.5 Compliance with International Standards: The production process and product quality comply with national and international standards, with stable performance and reliable quality, which can meet the requirements of high-standard pipeline projects at home and abroad.
4.6 Protect Conveyed Medium: The non-toxic and inert 3PE coating will not react with the conveyed medium (such as drinking water, crude oil, natural gas), ensuring the purity and safety of the medium.
5.1 Oil & Gas Industry: Long-distance transmission pipelines for crude oil, natural gas and refined oil; oilfield gathering and transportation pipelines, wellhead pipelines, and offshore oil and gas pipelines (resisting seawater corrosion).
5.2 Municipal Engineering: Urban water supply and drainage pipelines (especially drinking water pipelines, complying with environmental protection standards); urban natural gas pipelines, heating pipelines, and underground comprehensive pipe gallery pipelines.
5.3 Chemical Industry: Pipelines for conveying chemical media (such as acid, alkali, salt solution, organic solvent), which can resist chemical corrosion and ensure the safety and stability of transportation.
5.4 Hydraulic & Water Conservancy Engineering: Reservoir water delivery pipelines, river diversion pipelines, irrigation pipelines, and water conservancy hub pressure pipelines (adapting to humid and corrosive soil environments).
5.5 Power Industry: Power plant cooling water pipelines, thermal power transmission pipelines, and renewable energy (solar, wind power) supporting pipelines.
5.6 Other Fields: Mine tailings conveying pipelines, port and wharf engineering pipelines, bridge and steel structure supporting pipelines, and industrial circulating water pipelines.
