Hot Products
China 3LPP Coated Steel Pipe Suppliers - High-Performance Polypropylene Coating from a Reliable Factory
Detailed Description of 3LPP Coated Steel Pipe
The 3LPP coating system offers a pipeline protection solution based on 3LPE technology tailored for elevated temperature situations and claims the same construction scheme as 3LPE but with the outer layer being polypropylene (PP). PP is ideally suited for high temperature pipeline service because of its excellent mechanical properties and temperature resistance. With that, it is the camera in hot oil or steam pipelines and pipelines crossing high temperature areas (i.e. deserts or geothermal).
🔵
Layer 1: Fusion Bonded Epoxy (FBE) Primer
Provides corrosion prevention as well as superb adhesion to steel.
🟠
Layer 2: Copolymer Adhesive
The adhesive used to bond the FBE primer to the PP topcoat.
🟢
Layer 3: Polypropylene (PP) Top Coat
Corrosion resistant, high temperature resistance, high hardness, high abrasion resistance. Also provides protection against mechanical damage.
Key Parameters
| Parameter | Details |
|---|---|
| Coating Structure | FBE Primer + Adhesive Layer + PP Top Coat |
| Executive Standards | ISO 21809-1, DIN 30678, EN10286 |
| Total Coating Thickness | 1.8 – 4.5mm (or as per project/standard requirements) |
| Hardness | Shore D Hardness ≥ 60 |
| Vicat Softening Point | ≥ 140°C |
| Tensile Strength | ≥ 20 MPa |
Frequently Asked Questions (FAQ)
Q
What is 3LPP coated steel pipe and how does it differ from 3LPE?
3LPP (Three-Layer Polypropylene) coated steel pipe shares the same three-layer construction as 3LPE (Three-Layer Polyethylene), but replaces the outer polyethylene layer with polypropylene (PP). This substitution significantly improves the pipe's ability to withstand higher operating temperatures, making 3LPP the preferred choice for hot oil, steam, and high-temperature environment applications.
Q
What temperature range can 3LPP coated steel pipes handle?
3LPP coated steel pipes are engineered for elevated temperature service. The polypropylene top coat has a Vicat Softening Point of ≥ 140°C, allowing these pipes to perform reliably in high-temperature environments such as desert crossings, geothermal zones, and hot oil or steam pipeline systems.
Q
What international standards govern 3LPP coated steel pipes?
3LPP coated steel pipes are manufactured in compliance with internationally recognized standards including ISO 21809-1, DIN 30678, and EN 10286. These standards define requirements for coating structure, thickness, adhesion, mechanical properties, and performance testing to ensure consistent quality and safety.
Q
What is the role of each coating layer in the 3LPP system?
The three layers each serve a distinct function: Layer 1 (FBE Primer) provides primary corrosion protection and strong adhesion to the steel substrate. Layer 2 (Copolymer Adhesive) bonds the FBE layer to the outer PP coat, ensuring structural integrity. Layer 3 (PP Top Coat) delivers mechanical protection, abrasion resistance, and high-temperature performance for the pipeline's outer surface.
Q
What is the typical coating thickness for 3LPP coated steel pipes?
The total coating thickness for 3LPP coated steel pipes typically ranges from 1.8mm to 4.5mm. The exact thickness may vary depending on the pipe diameter, operating conditions, and specific project or standard requirements. Customized thickness specifications can also be accommodated upon request.
Q
What are the main application scenarios for 3LPP coated steel pipes?
3LPP coated steel pipes are widely used in industries and environments where high temperatures and harsh conditions are present. Typical applications include hot oil transmission pipelines, steam injection lines, pipelines routed through desert or geothermal regions, and any infrastructure requiring superior corrosion resistance combined with elevated temperature tolerance.