Product Overview
| Item | Details |
| Product Name | Anti Corrosion 3PE Coated Seamless Steel Pipe for Crude Oil Transportation |
| Base Pipe Type | Seamless Steel Pipe |
| Standard Compliance | API 5L, ISO 3183, DIN 30670, ISO 21809-1, SY/T 0413 |
| Main Application | Crude oil transmission pipelines, natural gas transportation, offshore oil engineering, water supply projects, chemical industrial piping |
| Minimum Order Quantity | 50 Tons |
| Supply Capacity | 10000 Tons per Month |
| Port of Shipment | Tianjin Port, China |
3PE Coating Layer Structure & Parameters
| Layer No. | Layer Material | Standard Thickness Range | Core Function |
| 1 (Bottom Layer) | Fusion Bonded Epoxy (FBE) | ≥ 100μm | Provides electrochemical corrosion protection, forms strong chemical bonding with steel pipe surface |
| 2 (Middle Layer) | Copolymer Adhesive (AD) | 170μm - 250μm | Acts as molecular bridge, bonds epoxy bottom layer with polyethylene outer layer |
| 3 (Outer Layer) | High Density Polyethylene (PE) | 1.8mm - 3.7mm | Provides mechanical protection, blocks moisture and corrosive medium from penetrating |
Product Size Specifications
| Parameter | Range |
| Outer Diameter (O.D.) | 114.3mm - 3020mm |
| Wall Thickness (W.T.) | 5mm - 60mm |
| Pipe Length | 6m / 12m / custom length available |
Available Steel Grades
| Category | Steel Grades |
| Carbon Steel | Q195, Q235, Q345, 10#, 20# |
| Pipeline Steel | L245(B), L290(X42), L320(X46), L360(X52), L390(X56), L415(X60), L450(X65), L485(X70) |
3PE Coating Performance Parameters
| Performance Test | Standard Requirement | Test Condition |
| Interlayer Peel Strength | ≥ 70N/cm | Room temperature |
| Cathodic Disbonding Radius | < 8mm | 1.5V, 65°C, 28 days |
| Low Temperature Impact Resistance | No crack | -30°C, 3.5J impact energy |
| Oxidation Induction Time | ≥ 20 minutes | 200°C |
| Vicat Softening Point | > 110°C | - |
| Polyethylene Density | 0.94g/cm³ - 0.96g/cm³ | - |
Advantages of 3PE Coated Seamless Steel Pipe
| Advantage | Description |
| Excellent Corrosion Resistance | Three-layer structure forms an impermeable barrier to prevent soil, chemical and microbial corrosion, extend pipe service life by 3-5 times compared to uncoated pipes |
| High Mechanical Strength | Resists external impact, soil stress and plant root penetration, suitable for long-distance buried crude oil pipeline projects |
| Low Moisture Permeability | Effectively blocks water and salt penetration, avoids steel matrix corrosion in high salinity and high humidity soil environments |
| Customizable Coating Thickness | Adjust coating thickness according to project environment and pipe size to balance performance and cost |
| Meets International Standards | Produced and tested in strict compliance with international and industry standards, stable quality for large-scale engineering projects |
Application Environment Recommendations
| Application Scenario | Recommended Coating Standard | Key Notes |
| Onshore Buried Crude Pipeline (Harsh Soil: High Salinity/Acidity) | ISO 21809-1 / SY/T 0413 | Thicker coating required for long-term durability |
| Onshore Standard Soil Environment | DIN 30670 / SY/T 0413 | Standard thickness meets engineering requirements |
| Offshore Crude Oil Pipeline | 3LPP Coating Recommended | 3PE can be used for shallow water applications, 3LPP offers better temperature and UV resistance for deep water offshore environments |
| Long Distance High Pressure Crude Oil Transmission | ISO 21809-1 | Stricter thickness requirements for large diameter high pressure pipes ensure project safety |
Packaging & Delivery
| Item | Details |
| Pipe End Protection | Plastic or metal protective caps for both ends to protect coating and threads |
| Surface Treatment | Available with varnish as optional extra protection |
| Packaging | Bundled with steel strips, seaworthy packing for container or bulk vessel shipment |
| Delivery Time | 15 - 30 working days after deposit received, depends on order quantity |
| Payment Terms | T/T, L/C at sight |
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FAQ
Q: What is 3PE coated seamless steel pipe, and why is it ideal for crude oil transportation?
A: 3PE coated seamless steel pipe uses a three-layer protective structure (fusion bonded epoxy base, adhesive middle layer, polyethylene outer layer) to shield the seamless steel core. This impermeable barrier blocks corrosive elements common in buried/offshore environments, making it perfect for long-distance crude oil transmission. It prevents corrosion leakage and extends pipeline lifespan far beyond uncoated alternatives.
Q: How long does a 3PE coated crude oil pipeline last?
A: With proper installation and maintenance, our 3PE coated pipes service 30-50 years in standard buried conditions, 3-5 times longer than ordinary uncoated steel pipes. This drastically cuts long-term maintenance and replacement costs for large crude oil projects.
Q: What international standards do your products comply with?
A: All our 3PE coated seamless pipes meet global recognized standards including API 5L (pipeline steel), ISO 21800-1 (3PE coating), DIN 30670 and SY/T 0413. Every batch undergoes third-party testing to confirm performance meets all standard requirements before shipment.
Q: How do you prevent common 3PE coating defects?
A: We avoid delamination, cracking and poor adhesion through strict process control: steel pipe surfaces are sandblasted to Sa 2.5 grade with 40-100μm roughness, we strictly monitor heating temperature during production, and test interlayer peel strength for every batch to ensure it meets the ≥70N/cm standard requirement.
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