Product Description

Our Inner Epoxy Resin Outer Polyethylene Coated Composite Steel Pipe represents the pinnacle of innovation in anti-corrosive technology. This remarkable steel-plastic composite product is engineered with precision, utilizing a pre-treated steel pipe as its core. The inner surface is expertly coated with a fusion bonded epoxy powder, ensuring robust protection against corrosion. Meanwhile, the outer layer is enveloped in a high-quality polyethylene powder, providing an additional shield of durability and performance. Experience the perfect blend of strength and resilience with our cutting-edge solution.

Nominal Diameter/ mmInner Coating Layer /mmOuter coating layer,mm Ordinary levelStrengthen level DN ≤65>0.3>0.6>0.8 65≤DN≤150>0.35>0.8>1.0 150≤DN≤300>0.35>0.8>1.2 300≤DN≤800>0.4>1.0>1.3 800≤DN≤1200>0.45>1.2>1.8 1200≤DN≤4000>0.45>1.5>1.8

Product Features

1. Corrosion Resistance
Crafted with anti-corrosion materials such as polyethylene and epoxy resin, these superior polymer materials exhibit unparalleled resistance to corrosion. They effectively shield the pipeline from soil and fluid damage, thereby dramatically extending its service life.

2. Excellent Hydraulic Properties
Featuring a brilliantly smooth inner wall, our pipes resist scaling with a low friction coefficient. The smooth, non-stick surface ensures optimal pipeline conveying capacity while minimizing pressure loss and reducing energy consumption during water transmission.

3. Good Hygiene Performance
The epoxy resin coating provides a smooth, hygienic surface that resists scaling, ensuring safety and meeting GB/T17219 health standards. This effectively prevents contamination of water quality by the pipeline.

4. Superior Adhesion of Coating
Our advanced formulation combines modified epoxy resin and polyethylene powder to form a robust chemical bond with metal surfaces, ensuring strong adhesion. The tough outer polyethylene layer offers excellent impact resistance, guarding against scratches from dragging or knocking, and it effectively withstands plant root penetration.

5. Long Life
Engineered for longevity, these anti-corrosion steel pipes boast a remarkable usage span of 30 to 50 years under normal construction and usage conditions, significantly surpassing the lifespan of conventional steel pipes.

6. Good Connection Security
Offering an array of connection methods to suit varied environments and pressure needs, our pipes can be flanged, quick-coupled, butt-welded, stainless steel lined, or socket connected. Each connection method is mature, reliable, and designed for secure operation.

Appliation Cases

Our Advantages

1. At Shandong Donghong Pipe Industry Co., Ltd., we believe the excellence of our Spiral Welded Steel Pipe rests on meticulous process design and precision manufacturing. Leveraging state-of-the-art equipment and years of seasoned expertise, we ensure superior quality control in every key process. This commitment enables us to deliver products of unparalleled quality, earning us the trust and confidence of our esteemed clientele.
To meet the surging demand for robust large-diameter pipelines, Donghong introduces its large-diameter anticorrosion steel pipes, crafted to meet top international standards. These first-class products are a testament to our dedication to innovation and quality.  

2. Recognizing the diverse needs of various projects, Donghong has ingeniously engineered multiple connection methods for large-diameter anticorrosive steel pipes. Our offerings include flexible socket connections, butt welding, socket lap welds, ball lap welds, custom bevels, and more. Notably, we pioneered the large-diameter socket flexible connection, boasting a maximum socket caliber of 1.8M. This groundbreaking innovation has already been implemented in major Chinese water conservancy projects, establishing Donghong as the forerunner and leader in the domain of large-diameter steel pipe socket connections.
Donghong also takes pride in its expansive high-pressure pipe fittings factory, specializing in the production of large-diameter, high-pressure pipe fittings tailored for various projects. We offer bespoke solutions, customizing pipe fittings according to specific customer requirements and project environments, ensuring that each need is met with precision and excellence. Explore our diverse range of connection methods to discover the perfect fit for your project needs.

Socket type connectionFlange ConnectionClamp Connection