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3LPP Coated Steel Pipe Suppliers & Factory in China - High-Performance Multi-Layer Coating for High-Temperature Applications
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).
1
Layer 1: FBE Primer
Fusion Bonded Epoxy (FBE) Primer: Provides corrosion prevention as well as superb adhesion to steel.
2
Layer 2: Copolymer Adhesive
Copolymer Adhesive: The adhesive used to bond the FBE primer to the PP topcoat.
3
Layer 3: PP Top Coat
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)
What is a 3LPP coated steel pipe?
A 3LPP (3-Layer Polypropylene) coated steel pipe is a high-performance pipeline protected by a three-layer coating system consisting of a fusion-bonded epoxy (FBE) primer, a copolymer adhesive, and an outer polypropylene topcoat. It is designed specifically for pipelines operating under high-temperature conditions.
What is the difference between 3LPE and 3LPP coatings?
The primary difference is the outer layer material. While 3LPE uses Polyethylene (PE) for standard temperature applications, 3LPP uses Polypropylene (PP), which offers superior mechanical strength, higher hardness, and much better resistance to elevated temperatures.
What are the primary applications of 3LPP coated pipes?
Due to its high temperature and mechanical resistance, 3LPP coated pipes are ideal for hot oil and steam pipelines, geothermal projects, and pipelines running through extreme environments like deserts.
What are the standard specifications for 3LPP coatings?
3LPP coatings are manufactured and tested in accordance with international standards, including ISO 21809-1, DIN 30678, and EN 10286.
What is the typical thickness and hardness of the 3LPP coating?
The total coating thickness generally ranges from 1.8mm to 4.5mm depending on project requirements, featuring a Shore D hardness of ≥ 60 and a Vicat softening point of ≥ 140°C.