3PE pipe

Three-layer Polyethylene Coated Steel Pipes

3pe pipes offer superior corrosion resistance for oil, gas, water, and chemical applications in extreme environments.

3PE Pipe Three-Layer Polyethylene Pipe Corrosion-Resistant Pipe Coated Steel Pipe +2 More

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3PE pipe

Three-layer Polyethylene Coated Steel Pipes

3pe pipes offer superior corrosion resistance for oil, gas, water, and chemical applications in extreme environments.

3PE Pipe Three-Layer Polyethylene Pipe Corrosion-Resistant Pipe Coated Steel Pipe +2 More

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3PE Pipes are steel pipes coated with a three-layer polyethylene system, consisting of a fusion-bonded epoxy (FBE) base (150-300 µm), an adhesive layer (170-250 µm), and a polyethylene outer layer (1.8-3.7 mm), designed for superior corrosion resistance in extreme environments. Compliant with DIN 30670, ISO 21809-1, and SY/T0413-2002 standards, these pipes are ideal for oil and gas pipelines, water transmission systems, and chemical processing plants, offering a minimum tensile strength of 415 MPa.

The coating process involves surface preparation via shot blasting (Sa 2.5 cleanliness), followed by FBE application, adhesive extrusion, and polyethylene coating at ~200-240°C. Available in sizes from OD 159 mm to 2020 mm, wall thicknesses from 5 mm to 25 mm, and lengths of 6 m, 12 m, or customized up to 18 m, Three-Layer Polyethylene Pipes meet diverse project needs. Ends are plain, beveled, or threaded, with protective caps or rings for transport and installation.

Rigorous testing, including peel strength (≥100 N/cm at 20°C), impact resistance (≥7 J/mm coating thickness), and holiday detection (25 kV), ensures compliance with industry standards. The FBE layer provides chemical resistance, the adhesive ensures strong bonding, and the polyethylene offers mechanical protection against abrasion and corrosion, making Corrosion-Resistant Pipes suitable for underground and marine pipelines.

Compared to 2PE or single-layer FBE pipes, 3PE Pipes offer enhanced protection for severe conditions, with a lifespan of 40-50 years. They are ideal for buried pipelines and industrial fluid transport but may have higher costs due to the multi-layer coating. Regular inspections are recommended in highly abrasive environments.

3PE Pipes address pipeline corrosion, mechanical wear, and environmental degradation, delivering robust, long-lasting solutions for critical infrastructure and industrial applications.

3PE Pipes offer superior protection compared to other coated and uncoated pipes. Below is a comparison of key features.

Comparison of 3PE Pipes with Other Pipes
Feature	3PE Pipe	2PE Pipe	Single-Layer FBE Pipe
Coating Type	FBE + Adhesive + Polyethylene (2.2-4.5 mm)	Adhesive + Polyethylene (2-4.5 mm)	Single-layer FBE (300-500 μm)
Corrosion Resistance	Superior for extreme environments	Excellent for moderate conditions	Good for mild environments
Cost	Higher cost	Moderate cost	Cost-effective
Lifespan	40-50 years	30-40 years	20-30 years
Applications	Oil, gas, water, underground pipelines	Oil, gas, sewage, marine	Water, HVAC, fire protection

Key Features and Advantages of 3PE Pipes

3PE coated pipes are widely used in industries like oil and gas, water supply, and chemical pipelines due to their exceptional durability and performance.

Corrosion Resistance

The 3PE coating provides excellent protection against corrosion, preventing rust and extending the lifespan of steel pipes, even in aggressive environments such as underground or underwater installations.

High Durability and Impact Resistance

3PE pipes withstand mechanical stress, abrasion, and impact. The coating provides extra protection during transportation, installation, and operation, making them ideal for harsh conditions.

High Temperature Resistance

The polyethylene coating can handle temperatures from -40°C to +80°C, making 3PE pipes suitable for both low and high-temperature environments.

Chemical Resistance

The 3PE coating resists acids, alkalis, and other aggressive substances, making these pipes ideal for chemical and industrial applications.

Environmental Protection

3PE pipes are environmentally friendly and meet safety standards, preventing leaks and ensuring contaminants do not pollute the surrounding environment.

Easy Installation and Maintenance

These pipes are easy to install and require minimal maintenance due to their durable, long-lasting coating, reducing maintenance costs over time.

Cost-Effective

While offering superior protection, 3PE pipes are relatively affordable, providing long-term savings by reducing the need for frequent repairs and replacements.

Flexibility in Application

3PE pipes are versatile and can be used in water pipelines, oil and gas transportation, and chemical industry systems.

Thermal Insulation

The polyethylene coating provides excellent thermal insulation, preventing heat loss during fluid transport and ensuring energy efficiency in high-temperature applications.

3PE Pipes are steel pipes with a three-layer coating (fusion-bonded epoxy, adhesive, polyethylene) designed for superior corrosion resistance in extreme environments, ideal for oil, gas, and water applications.

The 3PE coating system consists of three layers: a fusion-bonded epoxy (FBE) layer for primary corrosion protection, an adhesive layer to bond the FBE and polyethylene, and a polyethylene (PE) layer for mechanical protection and additional corrosion resistance.

The FBE layer provides strong adhesion to the steel surface, excellent cathodic disbondment, and corrosion resistance across a wide temperature range (-40°C to 100°C). The adhesive layer, primarily polyolefin, forms hydrogen or chemical bonds with the FBE and has affinity with the PE layer for firm bonding. The PE layer offers electrical insulation, low water absorption (<0.01%), and strong resistance to mechanical damage.

3PE Pipes offer high sealing, energy savings, and environmental protection. They provide excellent corrosion and impact resistance, low water absorption (<0.01% at low temperatures), and high-strength epoxy combined with flexible PE and adhesive for reliable corrosion protection. Their service life extends up to 30-50 years.

Unlike bare pipes, which corrode in harsh environments and have a reduced lifespan, 3PE Pipes protect against corrosion, extending service life to 30-50 years. They reduce construction and maintenance costs, offer thermal insulation (25% of traditional pipe heat loss), and can be laid directly in underground or water environments, including frozen soil, without a ditch.

3PE Pipes have a service life of up to 50 years due to the stability and anti-aging properties of the three-layer coating under normal temperature and pressure conditions, providing excellent corrosion and mechanical protection.

3PE Pipes combine the advantages of 2PE (adhesive and PE layers) and FBE pipes (epoxy layer) while avoiding their weaknesses. The FBE layer enhances corrosion resistance, the adhesive ensures strong bonding, and the PE layer provides superior mechanical protection, making 3PE Pipes ideal for extreme environments compared to 2PE’s moderate protection and FBE’s limited mechanical strength.

E.g., Gr. B: Tensile ≥415 MPa, Yield ≥240 MPa, Elongation ≥30%. The PE layer also provides strong impact resistance, enhancing overall durability.

Yes, their three-layer coating provides excellent corrosion and impact resistance, making them ideal for buried applications, including direct installation in frozen soil or water without a ditch.

DIN 30670, ISO 21809-1, SY/T0413-2002, API 5L, and other standards ensure quality and performance for corrosion resistance and mechanical strength.

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Standards and Specifications

• 3PE Pipe specifications
• DIN 30670 coated steel pipes
• ISO 21809-1 3PE pipes
• Three-Layer Polyethylene Pipe standards

Applications

• 3PE Pipes for oil and gas pipelines
• Coated steel pipes for water transmission
• Corrosion-resistant pipes for chemical plants
• Durable piping for underground pipelines

Material and Grades

• 3PE Pipe material properties
• API 5L Gr. B coated pipes
• Polyethylene coated steel pipe grades
• Corrosion-resistant pipe materials

Manufacturing and Testing

• 3PE Pipe manufacturing process
• Coated steel pipe quality testing
• Polyethylene coating thickness standards
• Corrosion-resistant pipe adhesion testing

Note: 3PE Pipes meet international standards, ensuring high performance and durability. Contact suppliers for detailed specifications.

3PE pipe Standard Specifications

Manufacturing Standards for 3PE pipe
Standard	Description
GB/T3091	Welded steel pipe for low pressure liquid delivery
GB/T9711	Petroleum and natural gas industries -- Steel pipe for pipelines
IS: 3589	Steel tubes for water and sewage
IS: 1978-1982	Steel tubes for use in transportation of oil, gas, and petroleum products
ASTM A53	Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
DIN 2458	Welded steel pipes and tubes
EN10217	Welded steel tubes for pressure purposes. Technical delivery conditions. Non-alloy steel tubes with specified room temperature properties
API 5L	Line Pipe
SY/T5037	Spiral submerged arc-welded steel pipe for pipelines for low pressure field fluid service
SY/T5040	Spiral submerged arc-welded steel pipe piles
CJ/T3022	Spiral submerged-arc welded steel pipe for municipal heat supply
ASTM A252	Welded and seamless steel pipe piles

The zinc coating (80-100 microns) enhances the corrosion resistance of 3PE pipe , protecting the carbon steel base in harsh environments. The chemical composition ensures weldability and durability for

Coating Standards for 3PE pipe
Standard	Description
ANSI/AWWA C104/A21.4	American National Standard for Cement-Mortar Lining for Ductile-Iron Pipe and Fittings for Water
ISO 21809	Petroleum and natural gas industries -- External coatings for buried or submerged pipelines used in pipeline transportation systems
DIN 30670	Polyethylene coatings of steel pipes and fittings

These standards ensure that 3PE pipe meet rigorous requirements for corrosion resistance, mechanical strength, and suitability for applications like oil and gas pipelines, water transmission, and chemical processing.

3PE pipe Applications

3PE pipe typically refers to a type of polyethylene-coated steel pipe used in water distribution, drainage, and gas supply systems.

Water Supply – Common in municipal water systems and irrigation.
Sewer Systems – Used for drainage and wastewater applications.
Gas Distribution – Suitable for transporting natural gas and propane.
Extended Service Life – The 2PE coating significantly increases lifespan.
Low Maintenance – Enhanced protection lowers operational costs.
Customizability – Available in varied diameters and thicknesses.
Oil and Gas Transportation – Widely used for crude oil, petroleum products, and LNG/LPG pipelines.
Marine Pipelines – Designed for offshore drilling, subsea transport, and marine applications.

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