Coated Steel Pipe
Your Professional Coated Steel Pipe Supplier
GNEE Pipe provides a full range of external pipe coating solutions, including single-layer FBE, dual-layer FBE, 2PE, 3PE, and 3PP coating systems. All coatings are applied in accordance with internationally recognized standards such as DIN 30670, DIN 30671, DIN 30678, CAN/CSA Z245.21, SY/T 4013, and SY/T 0315, ensuring reliable corrosion protection for demanding pipeline applications.
Brief Introduction to Coated Steel Pipe
Coated pipe refers to steel pipe that has been treated with protective coatings to enhance corrosion resistance, durability, and service life. These coating systems are widely applied in oil and gas pipelines, structural steel applications, and various industrial piping systems to protect the pipe surface from corrosion, chemical attack, and environmental damage.
For oil and gas pipeline applications, coated pipes are generally classified into two categories based on the coating location and function: internal pipe coatings, which protect the inner surface from corrosion and flow-related damage, and external pipe coatings, which provide protection against soil corrosion, moisture, and external environmental conditions.
coated pipe specification
Depending on project requirements, coated steel pipes can be supplied with different coating systems, including Fusion Bonded Epoxy (FBE), 2PE, 3PE, 2LPP, 3LPP, internal epoxy coating, concrete weight coating, and ceramic lining. The right coating selection depends on operating temperature, transportation medium, installation environment, and required service life.
| Coating Type | Coating Layer | Coating Thickness |
| 3PE Three layers polyethylene | Inside layer: epoxy (Green) | 2.0-4.5mm |
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Mid layerL adhensive (White) |
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| Outsidelayer: polyethlene (Black) | ||
| 2PE Two layers polyethylene | Inside layer: adgensice | 2.0-4.5mm |
| Outside layer:polythene | ||
| FBE | Epoxy | 200-400um |
| 2FBE Two layers epoxy | Inside layer: expoxy (Green) | 400-800um |
| Outer layer: intensity epoxy (sage green) | ||
| 3PP Three layers polyethylene | Inside layer:expoxy (Green) | 2.5-3.0mm |
| Mid layer: adhensive ( White) | ||
| Outer layer: polypropylene (White) | ||
| CWC | Concrete coating | |
| Rubber Lining Coating | Rubber coating | |
| Plastic Coated | Plastic coating |
| Internal Coating | |
| Liquid Epoxy Coacting | AWWAC210-2007 |
| FBE | AWWAC213-2001 |
| Cement Mortar Lining | BS534-1990, AWWA C205-2001 |
| Bitumen Coating | BS534-1990 |
| Rubber Lining Coating | NACE RP 0178 |
| Abrasion resistant ceramic lined | DIN 50902, ISO 21809 |
| Other special materials | Custom |
| Coating Type | Coating Standard |
|---|---|
| 3LPE / 3LPP | DIN30670-1991; CAN/CSA Z245.21-2010; ISO21809-1-2009; SY/T0413-2002; GB/T23257-2009 |
| 2LPE / 2LPP | SY/T0315-2002; GB/T23257-2009; ISO21809-1-2009 |
| FBE (Fusion Bond Epoxy) | SY/T0315-2005; AWWA C213-2001; CAN/CSA Z245.20-2010; ISO21809-2-2007; API RP 5L9-2001 |
| Bitumen Coating (Enamel & Tape hot-applied) | BS534-1990; AWWA C203-2002; AWWA C214-2000 |
| Liquid Epoxy Coating | AWWA C210-2007 |
| Polyurethane Insulated Coating | SY/T0415-1996; CJ/T114-2000; EN253-1994 |
| Heat Shrinkable Sleeves | ISO21809-3; EN12068; DIN30672; NACE SP303 |
| Plastic-coated | AWWA C213; AWWA C203; AWWA C229; DIN30670; DIN EN 10288; ISO21809-1 |
| Concrete Coated | AWWA C205 |
| Abrasion Resistant Ceramic Lined | DIN50929; ISO21809 |
| Other Special Materials | Custom |
Material Compliance & Global Standards
All base pipes and coating materials are strictly sourced and processed under ISO 9001 quality management:
- Steel Grades: API 5L Grade B, X42, X46, X52, X56, X60, X65, X70, X80; ASTM A53; ASTM A106; EN 10219 (S355J2H).
- Manufacturing Standards: API 5L (PSL1/PSL2), ASTM A252, AWWA C200, AS/NZS 1579.
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Bare pipe |
SSAW |
LSAW |
ERW |
SMLS |
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Production Range: |
OD:219mm-3120mm |
OD:16"-64" |
OD: 1/8"-24" |
OD: 1/8"-36" |
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Length: |
· Random Length / Fixed Length / SRL / DRL |
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Usage: |
Mechanical Tubing |
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Test: |
1.Chemical Component Analysis 2.Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation) |
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Coating Type: |
Fusion bond Epoxy Coating/ Coal Tar Epoxy /3PE /2PE/FBE/2FBE/3PP Varnish Coating |
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Applications by Coating Type
FBE Coated Pipe (Fusion Bonded Epoxy)
FBE coated pipes are widely used where excellent corrosion resistance, strong adhesion, and good abrasion protection are required. Typical applications include:
Fire Protection Systems: Automatic sprinkler piping, fire water mains, and other fire suppression pipeline systems.
Industrial Pipelines: High-temperature process pipelines, chemical transportation lines, and oil & gas gathering systems.
Water Supply & Drainage: Indoor and outdoor water pipelines, as well as high-pressure water transmission lines.
Other Applications: Power plant piping, seawater pipelines, and pipeline systems requiring enhanced wear resistance.
Liquid Epoxy Coated Pipe
Liquid epoxy coated pipes provide a cost-effective corrosion protection solution for general-purpose pipeline applications, especially where moderate protection requirements are needed.
Civil Construction: Indoor water supply systems, domestic drainage pipelines, and building branch pipe networks.
Municipal Projects: Low-pressure buried water pipelines, sewage transportation systems, and general utility pipelines.
Pipeline Repair & Maintenance: On-site coating repair and recoating of damaged steel pipe surfaces.
Cost-Sensitive Projects: Standard pipeline systems without severe corrosion or operating conditions.
3PE / 3LPE Coated Pipe
3PE and 3LPE coated pipes are designed for long-term underground service, offering excellent resistance to corrosion, moisture, and mechanical damage. They are commonly used in:
Long-Distance Buried Pipelines: Oil transmission pipelines, natural gas pipelines, and large-diameter water transmission projects.
Municipal Underground Networks: Urban water supply systems, buried gas pipelines, and utility pipeline networks.
Crossing Projects: Pipelines installed beneath roads, railways, and other infrastructure crossings.
Remote Field Pipelines: Pipeline systems operating in challenging soil environments and harsh outdoor conditions.
Concrete Coated Pipe (CWC)
Concrete weight coated (CWC) pipes are mainly used for offshore and underwater applications where additional weight, stability, and mechanical protection are required.
Submarine & Offshore Pipelines: Offshore oil and gas pipelines, subsea water pipelines, and marine transportation systems.
River & Lake Crossings: Pipelines requiring buoyancy control and protection against water flow impact.
Underwater Infrastructure: Port facilities, dock pipelines, and other submerged pipeline systems.
Deep Buried Pipelines: Pipelines installed under heavy soil loads or exposed to high external pressure conditions.
Comparison Table
| Feature | Epoxy Coated Pipe | FBE Coated Pipe | 3LPE (3PE) Coated Pipe | Concrete Coated Pipe |
|---|---|---|---|---|
| Full name | Epoxy coated steel pipe | Fusion Bonded Epoxy coated steel pipe | Three-layer Polyethylene coated steel pipe | Concrete weight coated steel pipe |
| Coating type | Organic (liquid or powder epoxy) | Organic (thermoset epoxy powder) | Multi-layer: Epoxy + adhesive + PE | Mineral (concrete) weight coating |
| Primary function | Corrosion protection (mild to moderate) | Corrosion protection (high performance) | Corrosion + mechanical protection | Negative buoyancy + impact protection |
| Impact resistance | Low to moderate | Moderate | High (thick PE outer layer) | Very high (concrete absorbs impact) |
| Typical application | Water lines, sewage, fire sprinkler internal coating | Buried pipelines, rebar, external coating for gas/water | Long-distance oil/gas, subsea pipelines, rocky terrain | Submarine pipelines, river crossings, wetlands |
coated steel pipe process line
Reliable coated steel pipe manufacturers perform strict coating inspections according to project specifications and applicable standards.
- Coating thickness measurement
- Holiday detection test
- Adhesion test
- Impact resistance test
- Cathodic disbondment test
- Surface inspection
Why Choose Our Coated Steel Pipe Solutions?
- Multiple coating systems for different pipeline environments
- Compliance with international coating standards
- Professional coating selection support
- Customized coating thickness and specifications
- Strict quality inspection before shipment
- Solutions for oil, gas, water, offshore, and industrial applications
Our Factory
GNEE Pipe is China's professional one-stop supply chain enterprise for steel products.
Our Certificate
GNEE Pipe Coated Pipe has been recognized by dozens of project companies and has become a star enterprise in Asia.
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Frequently Asked Questions
What is the difference between FBE and 3LPE coated steel pipe?
FBE is a single-layer epoxy coating mainly focused on corrosion protection and adhesion. 3LPE combines FBE, adhesive, and polyethylene layers to provide both corrosion resistance and stronger mechanical protection.
Which coating is better, 3LPE or 3LPP?
3LPE is widely used for conventional buried oil and gas pipelines. 3LPP provides better temperature resistance and abrasion resistance, making it suitable for high-temperature pipelines and offshore applications.
How long does coated steel pipe last?
The service life of coated steel pipe depends on coating type, operating temperature, soil or seawater conditions, installation quality, and maintenance practices. Properly selected coating systems can provide decades of pipeline protection.
Can coated steel pipes be customized?
Yes. Coated steel pipes can be customized according to pipe size, steel grade, coating type, coating thickness, application requirements, and international project standards.
What tests are performed on coated steel pipes?
Common tests include coating thickness inspection, holiday detection, adhesion testing, impact testing, and cathodic disbondment testing.