3pe anti-corrosive steel pipe is a carbon steel pipe protected by a three layer polyethylene (3PE) external coating system. The fusion-bonded epoxy (FBE) primer provides strong adhesion and chemical resistance, the copolymer adhesive bonds the layers together, and the outer polyethylene layer shields the pipe from moisture, soil and electrochemical corrosion. Coated and tested at the factory in strict accordance with GB/T 23257, ISO 21809-1 and DIN 30670, it is the preferred anti-corrosion solution for buried pipelines that require decades of reliable service.
Grade and Thickness
|
No. |
Nominal Diameter of Steel Pipe DN (mm) |
Epoxy Coating Layer (μm) |
Adhesive Layer (μm) |
Minimum Anticorrosive Coating Thickness (mm) – Standard Grade |
Minimum Anticorrosive Coating Thickness (mm) – Reinforced Grade |
|
1 |
DN≤100 |
≥120 |
≥170 |
1.8 |
2.5 |
|
2 |
100 |
≥120 |
≥170 |
2.0 |
2.7 |
|
3 |
250 |
≥120 |
≥170 |
2.2 |
2.9 |
|
4 |
500≤DN<800 |
≥120 |
≥170 |
2.5 |
3.2 |
|
5 |
DN≥800 |
≥120 |
≥170 |
3.0 |
3.7 |
Product Features
Complete corrosion protection
Isolates the steel from soil, groundwater and stray currents, greatly reducing the need for cathodic protection.
01
Strong layer adhesion
The FBE primer and adhesive create a tight bond that resists disbondment and prevents moisture from spreading under the coating.
02
Mechanical durability
The tough polyethylene jacket withstands impact, abrasion and soil pressure during handling and burial.
03
Full quality assurance
Every pipe undergoes holiday (spark) detection, adhesion, thickness and bending tests, with mill certificates and third-party inspection available (SGS / BV / TUV).
04
Low lifecycle cost
Minimal maintenance and long service life make 3PE pipe economical over the full project cycle.
05
Applications
Long-distance oil and natural gas transmission pipelines
Municipal water supply and water conveyance pipelines
Chemical and industrial process piping
Mining slurry and other buried media pipelines
Any buried steel pipeline where long-term corrosion resistance is critical
Customization
Pipe size: outer diameter, wall thickness and length per your project drawings
Steel grade & specification: API 5L (X42–X80) or GB/T 9711 equivalents
Coating grade: normal, reinforced or heavy per design requirements
End preparation: plain end or beveled for field welding
Inspection & documents: third-party inspection reports, EN 10204 3.1/3.2 certificates, material test certificates
Packing & shipping: pipe end caps, protective packing for sea freight, loading supervision and shipping marks per request
Customization Process
1
The client provides project specifications or operating parameters, including pipe diameter, wall thickness, steel grade, coating grade, and quantity requirements.
2
Xingbang's technical team prepares the coating scheme, technical drawings, and a detailed quotation.
3
Both parties confirm technical parameters, delivery schedules, and payment terms.
4
Following incoming inspection of the steel pipes, production is organized according to standard processes, with quality control points established for key stages.
5
Finished products undergo comprehensive performance testing at a CNAS-accredited facility, and a complete test report is issued.
6
Products are packaged and labeled according to client requirements, and shipment is arranged via sea or land transport.
Quality Control & Testing
At Xingbang Pipe, quality is managed throughout production, not just checked at the end. Our ISO 9001-certified quality system covers every process from steel pipe incoming inspection to finished coating, and our testing center has passed CNAS laboratory accreditation.
Every batch is tested in our own laboratory in accordance with GB/T 23257 (or your project standard) before release:
Visual inspection of the full coating surface
Coating thickness measurement at defined points
Holiday (pinhole) detection with high-voltage spark testing
Adhesion (peel) strength testing
Impact resistance and indentation testing
Bending tests for applicable diameters
Cathodic disbondment testing to verify long-term anti-corrosion performance
Each pipe is marked with a traceable production code, so any batch can be traced back to its production line and date. Along with the shipment we provide complete test reports and material certificates, and we are happy to arrange third-party inspection by SGS, BV, TUV or other agencies at your request.
Process Flow Diagram
Recommendations for Project Specifications
Catering to the international market, Xingbang's 3PE anti-corrosive steel pipe can meet the combined standard requirements of various regions. Below are common standard combinations for international projects:
|
Target Market / Project Type |
Steel Pipe Standard |
Coating Standard |
Special Requirements |
|
Middle East Oil & Gas Projects |
API 5L PSL2 |
ISO 21809-1 |
High-temperature FBE primer + thick PE topcoat |
|
European Municipal Projects |
EN 10217 / EN 10219 |
DIN 30670 |
CE marking, environmental compliance certification |
|
African Long-distance Pipelines |
API 5L PSL1/PSL2 |
ISO 21809-1 |
UV-resistant reinforced topcoat, high-temperature resistance |
|
Southeast Asia Water Supply Project |
ASTM A53 / GB/T 9711 |
ISO 21809-1 |
Drinking water safety certification, anti-bacterial coating |
|
South American Oil and Gas Projects |
API 5L PSL2 |
ISO 21809-1 |
High-performance thick coating system for high-strength steel grades (X70–X80) |
FAQ
Q: Which standards do your 3pe anti-corrosive steel pipe comply with?
A: We manufacture and test per GB/T 23257 and can also supply to ISO 21809-1, DIN 30670 or your project specification.
Q: Can you provide certificates and third-party inspection?
A: Yes - material certificates, coating test reports, and third-party inspection by SGS, BV, TUV or other agencies are available on request.
Q: What is your MOQ and lead time?
A: MOQ and lead time depend on size and coating grade - contact us with your specification for a confirmed quote and schedule.
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