3LPP STEEL PIPE
3PP STEEL PIPE
Outside Diameter：Φ60mm – 3000mm (2″ – 118″)
Wall Thickness：5.0 – 40mm (0.2″-1.6″)
Quality Standards：ISO 21809-3, CSA Z245.21, DIN 30678, NACE RP0185
Length：6 – 12.5m(20″-40″)
Coating：3PP (3-Layer Polypropylene) or customized solutions
description
3PP steel pipes are corrosion-resistant pipes coated with three layers of polypropylene, including epoxy primer, adhesive copolymer, and polypropylene top layer. The system has excellent resistance to mechanical damage, chemical corrosion and high temperatures (up to 110°C). It is mainly used in harsh environments such as subsea pipelines, chemical transportation, and high-temperature industrial applications, extending pipeline life to 30-50 years while reducing maintenance costs. The coating is applied by automatic electrostatic spraying, and each layer is subject to strict quality control.
Product Name: 3PP Coated Pipe, 3-Layer PP Steel Pipe, Polypropylene Anti-Corrosion Pipe.
Specifications:
Outer Diameter: 60mm-3000mm
Wall Thickness: 5-40mm
Length: 6m / 6m / 12m / 12.5m (customizable)
Standard and Steel Grade:
API SPEC 5L：Gr.B, X42, X52, X60, X65, X70 (PSL1/PSL2)
EN 10217-1：P235GH, P265GH, P355NH
ASTM A106/A53：Grade B
GB/T 9711：L245, L290, L360, L415
Ends: Bevelled ends / Cap-protected / Flange-ready
Surface Treatment: Sandblasted to Sa 2.5 (ISO 8501-1),Coating: 3PP (Fusion-Bonded Epoxy + Adhesive + PP Overwrap)
Specification
| Category | Parameter | FBE Steel Pipe | 3PE Steel Pipe | 3PP Steel Pipe |
| Basic Specs | OD (mm/in) | 60-3000 (2″-118″) | 60-3000 (2″-118″) | 60-3000 (2″-118″) |
| Wall Thickness (mm) | 5.0-40 | 6.0-45 | 6.0-45 | |
| Length (m/ft) | 6-18 (20′-60′) | 6-18 (20′-60′) | 6-18 (20′-60′) | |
| Coating Color | Green/Beige/Custom | Black (Std) | Yellow/Custom | |
| Temp. Range (°C) | -40~100 (150°C DL*) | -40~80 | -40~140 | |
| Coating Structure | Base Layer | FBE Primer | FBE Primer | FBE Primer |
| Intermediate Layer | N/A | Copolymer Adhesive | Copolymer Adhesive | |
| Top Layer | N/A | Polyethylene (2-4mm) | Polypropylene (2-4mm) | |
| Certifications | Intl. Standards | ISO 21809-2 CSA Z245.20 | ISO 21809-1 DIN 30670 | ISO 21809-3 GB/T 23257 |
| Special Certs | NSF/61 (Potable Water) | – | – | |
| Performance | Cathodic Compatibility | Excellent | Good | Excellent |
| Abrasion Resistance | Moderate | Good | Superior | |
| Chemical Resistance | Good | Moderate | Superior | |
| Packaging | End Protectors | Beveled/Plain End Caps | Same as FBE | Same as FBE |
| Interlayer Padding | Specialty Spacers | Reinforced Spacers | Reinforced Spacers | |
| Max. Stack Height | 3.5m | 3.0m | 3.0m | |
| Commercial Terms | Delivery Time | 30-60 days | 45-75 days | 45-75 days |
| Payment Terms | 30% Deposit 70% Pre-ship | Same as FBE | Same as FBE | |
| 20’GP Container Loading | 28 MT | 25 MT | 25 MT |
production process
application
3PP coated steel pipes are widely used in transportation and structural engineering in harsh environments:
Oil and gas transportation: submarine crude oil/natural gas trunk lines, city gas pipeline network
Chemical industry: acid and alkaline medium transportation pipelines, chemical plant reaction area pipelines
Energy engineering: steam pipelines for thermal power plants, casing for geothermal wells, carbon capture systems
Water conservancy projects: seawater desalination pipes, municipal water supply and drainage trunk pipes, hydropower station pressure pipelines
Mining and metallurgy: slurry transportation pipelines, high-temperature flue gas pipes in smelters, tailings backfill pipes
Infrastructure engineering: anti-corrosion support pipes for cross-sea bridges, pile pipes for port wharves, and tunnel support structures
Environmental protection projects: flue gas treatment pipes for garbage incineration plants, aeration pipes for sewage treatment plants
Special use: steam pipes for food industry, clean media conveying pipes for pharmaceutical factories
advantages
Triple-layer protection, withstanding harsh environments
A three-layer composite structure builds a robust defense against seawater corrosion, fluctuating soil pH values, and chemical penetration, designed specifically for severe corrosion conditions.
Superior impact resistance, durable and long-lasting
The polypropylene outer layer provides excellent impact resistance, effectively reducing the risk of surface damage caused by rock excavation or mechanical construction.
Stable performance under high temperatures
Suitable for high-temperature working conditions, it is an ideal choice for the transportation of thermal fluids and geothermal applications, ensuring the performance stability of the coating in thermal environments.
Environmentally safe and certified
Meets international drinking water safety standards, uses environmentally friendly materials, and is suitable for ecologically sensitive areas.
Cost optimization throughout the entire lifecycle
Reduces long-term maintenance needs and significantly enhances the economic benefits of the project throughout its entire lifecycle.
packing
When transporting large-diameter 3PP corrosion-resistant steel pipes, the main focus is on effectively preventing pipe deformation and ensuring coating integrity. For this, it is necessary to use dedicated transport brackets for reliable fixation and strengthen protection at both ends of the pipe. The main transportation methods are as follows:
Container transportation: Suitable for short pipe sections, featuring cost-effectiveness and operational convenience.
Bulk carrier transportation: Suitable for large-volume transportation, requiring the development of strict pipe fixation plans.
Specialized pipeline transport vessels: Equipped with custom support systems, providing the highest level of transportation safety for long-distance maritime transport.
Protective measures during transportation:
Apply a protective film to the outer surface of the pipeline to prevent scratches and damage.
Install special protective covers at both ends of the pipeline.
When stacking multiple layers, cushioning pads must be placed between each layer.
| Category | Parameter | FBE Steel Pipe | 3PE Steel Pipe | 3PP Steel Pipe |
| Basic Specs | OD (mm/in) | 60-3000 (2″-118″) | 60-3000 (2″-118″) | 60-3000 (2″-118″) |
| Wall Thickness (mm) | 5.0-40 | 6.0-45 | 6.0-45 | |
| Length (m/ft) | 6-18 (20′-60′) | 6-18 (20′-60′) | 6-18 (20′-60′) | |
| Coating Color | Green/Beige/Custom | Black (Std) | Yellow/Custom | |
| Temp. Range (°C) | -40~100 (150°C DL*) | -40~80 | -40~140 | |
| Coating Structure | Base Layer | FBE Primer | FBE Primer | FBE Primer |
| Intermediate Layer | N/A | Copolymer Adhesive | Copolymer Adhesive | |
| Top Layer | N/A | Polyethylene (2-4mm) | Polypropylene (2-4mm) | |
| Certifications | Intl. Standards | ISO 21809-2 CSA Z245.20 | ISO 21809-1 DIN 30670 | ISO 21809-3 GB/T 23257 |
| Special Certs | NSF/61 (Potable Water) | – | – | |
| Performance | Cathodic Compatibility | Excellent | Good | Excellent |
| Abrasion Resistance | Moderate | Good | Superior | |
| Chemical Resistance | Good | Moderate | Superior | |
| Packaging | End Protectors | Beveled/Plain End Caps | Same as FBE | Same as FBE |
| Interlayer Padding | Specialty Spacers | Reinforced Spacers | Reinforced Spacers | |
| Max. Stack Height | 3.5m | 3.0m | 3.0m | |
| Commercial Terms | Delivery Time | 30-60 days | 45-75 days | 45-75 days |
| Payment Terms | 30% Deposit 70% Pre-ship | Same as FBE | Same as FBE | |
| 20’GP Container Loading | 28 MT | 25 MT | 25 MT |
3PP coated steel pipes are widely used in transportation and structural engineering in harsh environments:
Oil and gas transportation: submarine crude oil/natural gas trunk lines, city gas pipeline network
Chemical industry: acid and alkaline medium transportation pipelines, chemical plant reaction area pipelines
Energy engineering: steam pipelines for thermal power plants, casing for geothermal wells, carbon capture systems
Water conservancy projects: seawater desalination pipes, municipal water supply and drainage trunk pipes, hydropower station pressure pipelines
Mining and metallurgy: slurry transportation pipelines, high-temperature flue gas pipes in smelters, tailings backfill pipes
Infrastructure engineering: anti-corrosion support pipes for cross-sea bridges, pile pipes for port wharves, and tunnel support structures
Environmental protection projects: flue gas treatment pipes for garbage incineration plants, aeration pipes for sewage treatment plants
Special use: steam pipes for food industry, clean media conveying pipes for pharmaceutical factories
Triple-layer protection, withstanding harsh environments
A three-layer composite structure builds a robust defense against seawater corrosion, fluctuating soil pH values, and chemical penetration, designed specifically for severe corrosion conditions.
Superior impact resistance, durable and long-lasting
The polypropylene outer layer provides excellent impact resistance, effectively reducing the risk of surface damage caused by rock excavation or mechanical construction.
Stable performance under high temperatures
Suitable for high-temperature working conditions, it is an ideal choice for the transportation of thermal fluids and geothermal applications, ensuring the performance stability of the coating in thermal environments.
Environmentally safe and certified
Meets international drinking water safety standards, uses environmentally friendly materials, and is suitable for ecologically sensitive areas.
Cost optimization throughout the entire lifecycle
Reduces long-term maintenance needs and significantly enhances the economic benefits of the project throughout its entire lifecycle.
When transporting large-diameter 3PP corrosion-resistant steel pipes, the main focus is on effectively preventing pipe deformation and ensuring coating integrity. For this, it is necessary to use dedicated transport brackets for reliable fixation and strengthen protection at both ends of the pipe. The main transportation methods are as follows:
Container transportation: Suitable for short pipe sections, featuring cost-effectiveness and operational convenience.
Bulk carrier transportation: Suitable for large-volume transportation, requiring the development of strict pipe fixation plans.
Specialized pipeline transport vessels: Equipped with custom support systems, providing the highest level of transportation safety for long-distance maritime transport.
Protective measures during transportation:
Apply a protective film to the outer surface of the pipeline to prevent scratches and damage.
Install special protective covers at both ends of the pipeline.
When stacking multiple layers, cushioning pads must be placed between each layer.
