3LPE Coating Anti-Corrosion SSAW Steel Pipe
3LPE Coating Anti-Corrosion SSAW Steel Pipe
Product Introduction
3LPE (Three-Layer Polyethylene) coating is one of the most effective anti-corrosion systems for steel pipes, providing excellent protection in harsh environments. When applied to SSAW (Spiral Submerged Arc Welded) steel pipes, the 3LPE coating ensures enhanced durability and longevity, making these pipes ideal for various applications, including oil and gas transportation, water pipelines, and infrastructure projects.
Characteristics of 3LPE Coating
- Corrosion Resistance: Provides outstanding protection against corrosion, chemical exposure, and environmental factors.
- Durability: Highly resistant to impact and abrasion, ensuring long-term performance.
- Flexibility: Adapts to the pipe’s surface, maintaining integrity even under mechanical stress.
- Adhesion: Excellent adhesion to the steel substrate, preventing delamination and coating failure.
- UV Resistance: Resistant to ultraviolet (UV) radiation, making it suitable for above-ground and buried applications.
Structure of 3LPE Coating
The 3LPE coating consists of three layers:
- Layer 1 – Fusion Bonded Epoxy (FBE):
- Function: Provides excellent adhesion to the steel surface and acts as the primary corrosion protection layer.
- Thickness: Typically 100-200 microns.
- Layer 2 – Adhesive:
- Function: Binds the epoxy layer to the outer polyethylene layer, enhancing the overall coating system’s integrity.
- Thickness: Typically 200-300 microns.
- Layer 3 – Polyethylene (PE):
- Function: Provides mechanical protection against physical damage and environmental factors.
- Thickness: Typically 1.8-3.0 mm, depending on application requirements.
Advantages of 3LPE Coated SSAW Steel Pipe
- Enhanced Corrosion Protection: Superior resistance to corrosion in harsh environments, extending the pipe’s service life.
- Mechanical Strength: High impact and abrasion resistance, protecting the pipe during handling, installation, and operation.
- Thermal Stability: Maintains performance across a wide temperature range, suitable for various climates and conditions.
- Cost-Effective: Reduces maintenance and replacement costs due to its long-lasting protective properties.
- Versatility: Suitable for both underground and above-ground applications in various industries.
Application of 3LPE Coated SSAW Steel Pipe
- Oil and Gas Pipelines: Used for transporting crude oil, natural gas, and refined products.
- Water Pipelines: Ideal for potable water and wastewater transportation.
- Infrastructure Projects: Utilized in construction projects requiring durable and corrosion-resistant piping systems.
- Chemical and Petrochemical Plants: Suitable for transporting corrosive substances and chemicals.
Process Flow of 3LPE Coated SSAW Steel Pipe
- Pipe Manufacturing: SSAW pipes are produced by forming and welding steel coils into a spiral shape.
- Surface Preparation: The pipe surface is cleaned using abrasive blasting to achieve the required surface roughness and remove contaminants.
- Fusion Bonded Epoxy (FBE) Application: The first layer of epoxy is applied to the heated pipe surface.
- Adhesive Application: The adhesive layer is applied over the cured epoxy layer.
- Polyethylene Application: The outer polyethylene layer is extruded onto the adhesive layer, forming the final protective coating.
- Cooling and Inspection: The coated pipe is cooled and inspected to ensure the coating’s quality and uniformity.
Inspection and Testing
To ensure the quality and performance of 3LPE coated SSAW steel pipes, the following inspection and testing procedures are implemented:
- Visual Inspection: Examination of the coating for any visible defects or irregularities.
- Thickness Measurement: Verification of the coating thickness using appropriate measuring devices.
- Adhesion Testing: Ensuring the coating adheres properly to the steel substrate.
- Impact Resistance Testing: Assessing the coating’s ability to withstand mechanical impacts.
- Holiday Testing: Detecting any pinholes or discontinuities in the coating.
- Peel Test: Evaluating the cohesive strength of the coating layers.
Packaging and Delivery
Proper packaging and handling of 3LPE coated SSAW steel pipes are crucial to prevent damage during transportation and storage:
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- Packaging:
- Pipes are typically bundled and secured with steel strips.
- Ends are capped to prevent contamination.
- Protective measures are taken to prevent damage to the coating during handling and transportation.
- Marking:
- Each pipe is marked with relevant details such as grade, size, heat number, and manufacturer’s name.
- Comprehensive documentation accompanies the shipment, including inspection and testing certificates, material test reports (MTR), and compliance certificates.
- Packaging:
SSAW Steel Pipe(Spiral Submerged Arc Pipe)
Sizes: Out diameter:219mm-3620mm
Wall thickness: 5mm-25.4mm
Length: 3m-48m
Standard and Classfication of SSAW Steel Pipe
| Classfication | Standard | Main Products | ||||||||||||||
| Line Pipe | API 5L PSL1/2 | Line pipe | ||||||||||||||
| Casing | API 5CT/ ISO 11960 PSL1 | Steel pipe for use as casing or tubing for wells of petroleum and natural gas industries | ||||||||||||||
| Steel Pipe for Fluid Service | ASTM A53 | Black and hot-hipped galvanized welded and seamless steel pipe | ||||||||||||||
| BS EN10217-2 | Welded steel tybes for pressure purposes – delivery technical conditions – part2: Electric welded non- alloy and alloy steel tubes with specified elevated temperature properties | |||||||||||||||
| BS EN10217-5 | Welded steel tybes for pressure purposes – delivery technical conditions – part5: submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties | |||||||||||||||
| Steel Pipe for Ordinary Structure | ASTM A252 | Welded and seamless steel pipe piles | ||||||||||||||
| BS EN10219-1 | Cold formed welded structural hollow sections of non-alloy and fine grain steels – part1: Technical delivert conditions | |||||||||||||||
| BS EN10219-2 | Cold formed welded structural hollow sections of non-alloy and fine grain steels – part2: tolerances dimmsions and sectional properties | |||||||||||||||
Chemical Analysis and Mechanical Properties of SSAW Steel Pipe
| Standard | Grade | Chemical Composition(max)% | Mechanical Properties(min) | |||||
| C | Si | Mn | P | S | Tensile Strength(Mpa) | Yield Strength(Mpa) | ||
| API 5CT | h40 | – | – | – | – | 0.030 | 417 | 417 |
| J55 | – | – | – | – | 0.030 | 517 | 517 | |
| K55 | – | – | – | – | 0.300 | 655 | 655 | |
| API 5L PSL1 | A | 0.22 | – | 0.90 | 0.030 | 0.030 | 335 | 335 |
| B | 0.26 | – | 1.20 | 0.030 | 0.030 | 415 | 415 | |
| X42 | 0.26 | – | 1.30 | 0.030 | 0.030 | 415 | 415 | |
| X46 | 0.26 | – | 1.40 | 0.030 | 0.030 | 435 | 435 | |
| X52 | 0.26 | – | 1.40 | 0.030 | 0.030 | 460 | 460 | |
| X56 | 0.26 | – | 1.40 | 0.030 | 0.030 | 490 | 490 | |
| X60 | 0.26 | – | 1.40 | 0.030 | 0.030 | 520 | 520 | |
| X65 | 0.26 | – | 1.45 | 0.030 | 0.030 | 535 | 535 | |
| X70 | 0.26 | – | 1.65 | 0.030 | 0.030 | 570 | 570 | |
| API 5L PSL2 | B | 0.22 | 0.45 | 1.20 | 0.025 | 0.015 | 415 | 415 |
| X42 | 0.22 | 0.45 | 1.30 | 0.025 | 0.015 | 415 | 415 | |
| X46 | 0.22 | 0.45 | 1.40 | 0.025 | 0.015 | 435 | 435 | |
| X52 | 0.22 | 0.45 | 1.40 | 0.025 | 0.015 | 460 | 460 | |
| X56 | 0.22 | 0.45 | 1.40 | 0.025 | 0.015 | 490 | 490 | |
| X60 | 0.12 | 0.45 | 1.60 | 0.025 | 0.015 | 520 | 520 | |
| X65 | 0.12 | 0.45 | 1.60 | 0.025 | 0.015 | 535 | 535 | |
| X70 | 0.12 | 0.45 | 1.70 | 0.025 | 0.015 | 570 | 570 | |
| X80 | 0.12 | 0.45 | 1.85 | 0.025 | 0.015 | 625 | 625 | |
| ASTM A53 | A | 0.25 | 0.10 | 0.95 | 0.050 | 0.045 | 330 | 330 |
| B | 0.30 | 0.10 | 1.20 | 0.050 | 0.045 | 415 | 415 | |
| ASTM A252 | 1 | – | – | – | 0.050 | – | 345 | 345 |
| 2 | – | – | – | 0.050 | – | 414 | 414 | |
| 3 | – | – | – | 0.050 | – | 455 | 455 | |
| EN10217-1 | P195TR1 | 0.13 | 0.35 | 0.70 | 0.025 | 0.020 | 320 | 320 |
| P195TR2 | 0.13 | 0.35 | 0.70 | 0.025 | 0.020 | 320 | 320 | |
| P235TR1 | 0.16 | 0.35 | 1.20 | 0.025 | 0.020 | 360 | 360 | |
| P235TR2 | 0.16 | 0.35 | 1.20 | 0.025 | 0.020 | 360 | 360 | |
| P265TR1 | 0.20 | 0.40 | 1.40 | 0.025 | 0.020 | 410 | 410 | |
| P265TR2 | 0.20 | 0.40 | 1.40 | 0.025 | 0.020 | 410 | 410 | |
| EN10217-2 | P195GH | 0.13 | 0.35 | 0.70 | 0.025 | 0.020 | 320 | 320 |
| P235GH | 0.16 | 0.35 | 1.20 | 0.025 | 0.020 | 360 | 360 | |
| P265GH | 0.20 | 0.40 | 1.40 | 0.025 | 0.020 | 410 | 410 | |
| EN10217-5 | P235GH | 0.16 | 0.35 | 1.20 | 0.025 | 0.020 | 360 | 360 |
| P265GH | 0.20 | 0.40 | 1.40 | 0.025 | 0.020 | 410 | 410 | |
| EN10219-1 | S235JRH | 0.17 | – | 1.40 | 0.040 | 0.040 | 360 | 360 |
| S275JOH | 0.20 | – | 1.50 | 0.035 | 0.035 | 410 | 410 | |
| S275J2H | 0.20 | – | 1.50 | 0.030 | 0.030 | 410 | 410 | |
| S355JOH | 0.22 | 0.55 | 1.60 | 0.035 | 0.035 | 470 | 470 | |
| S355J2H | 0.22 | 0.55 | 1.60 | 0.030 | 0.030 | 470 | 470 | |
| S355K2H | 0.22 | 0.55 | 1.60 | 0.030 | 0.030 | 470 | 470 | |
Corrosion prevention of pipes refers to measures to slow down or prevent corrosion and deterioration of pipes under the chemical or electrochemical action of the internal and external media or by the metabolic activities of microorganisms.
A concrete coated pipe, also known as a concrete weight coating pipe (CWC pipe), is a steel pipe that has been externally coated with concrete. The concrete coating consists of a mixture of cement, aggregates, reinforced steel mesh, and water. The purpose of this coating is to provide strong downward force protection or negative buoyancy for the pipelines. These pipes are commonly used in sub-sea (submarine) pipelines, as the concrete coating adds the necessary weight to withstand the pressure of seawater.
FBE coating steel pipe is fusion bonded epoxy coating steel pipe.It is a kind of external heat resin used for pipes.With a form of dry powder at thickness 400-600 microns on to the heated surface of pipe.Once the FBE coated on the pipe surface,the FBE film provides an extremely hard surface with great adhesion to the surface of pipe.The FBE layer in a even form and have good resistance to the chemical reaction.
Pipe Type: FBE (Fusion Bond Epoxy) Coated Pipe, Epoxy Coated Carbon Steel Pipe,Single-layer Anti-corrosion Epoxy Powder Pipe,Double Layer FBE Coating Pipes Application: Used for natural gas, petroleum, water & sewage, and pipe systems
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3PE, which stands for "Three-Layer Polyethylene," is a common coating used to protect steel pipes from corrosion and extend their service life, especially in applications where the pipes are exposed to harsh environments, such as in the oil and gas industry
