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Home Products plastic-coated steel pipe PLASTIC-CAATED STEEL PIPE
PLASTIC-CAATED STEEL PIPE
PLASTIC-CAATED STEEL PIPE
PLASTIC-CAATED STEEL PIPE
PLASTIC-CAATED STEEL PIPE
PLASTIC-CAATED STEEL PIPE
PLASTIC-CAATED STEEL PIPE
PLASTIC-CAATED STEEL PIPE
PLASTIC-CAATED STEEL PIPE

PLASTIC-CAATED STEEL PIPE

supplies plastic-coated steel pipes (epoxy/PE) from Φ21 mm to Φ1620 mm, combining steel strength with anti-corrosion coatings. Compliant with GB/T 28897, CJ/T 120, API 5L and ASTM standards. Ideal for drinking water, fire-fighting, oil & gas, and municipal projects. Custom internal/external coating solutions and mill certificates available."
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Product Details

1. Product Overview

Product Name: Plastic-Coated Steel Pipe (Epoxy Coated / PE Coated Steel Pipe)

Core Feature: Combines the high mechanical strength of steel pipes with the excellent corrosion resistance and smoothness of plastic coatings, solving the issues of rust, scaling, and secondary pollution common in traditional bare steel pipes.


2. Specification & Dimensions

Outer Diameter (OD): Φ21 mm – Φ1620 mm (Custom large diameters available)
Wall Thickness (WT): 2.0 mm – 60 mm (Selected based on substrate pipe: ERW/LSAW/Spiral)
Length: 5.8 m, 6 m, 11.8 m, 12 m (Random or fixed lengths supported)
Coating Types:

Internal & External Epoxy (FBE)

Internal Cement Mortar / External 3PE (Common for large diameters)

Internal Plastic (PE/PVC) / External Galvanized

IPN8710 Drinking Water Coating

Coating Thickness:

FBE: 250–500 μm

PE/PVC: 1.0–3.0 mm

3PE: 2.5–4.5 mm


3. Material & Substrate

Substrate Pipe: ERW, LSAW, SSAW (Spiral), Seamless
Carbon Steel: Q235, Q345 (Q355), 20#
Pipeline Steel: L245 (Gr.B), L290 (X42), L360 (X52), L415 (X60), L450 (X65)
Standards Compliance: GB/T 3091, GB/T 9711, API 5L, ASTM A53, ASTM A252

4. Executive Standards

GB/T 28897: Steel plastic composite pipe for water supply
CJ/T 120: Internal epoxy coating steel pipe for water supply
GB/T 9711: Petroleum and natural gas industries steel pipe
API Spec 5L: Specification for line pipe
ASTM A53 / A252: Standard specifications for pipe
ISO 3183: Petroleum and natural gas industries steel pipe

5. Mechanical & Performance Features

Corrosion Resistance: Dual-layer protection (substrate + plastic) prevents rust and extends service life (up to 50 years in buried conditions).
Smooth Inner Wall: Low friction coefficient, improving flow rate and reducing pumping energy costs.
High Mechanical Strength: Retains the pressure-bearing capacity and impact resistance of the steel substrate.
Hygienic & Non-Toxic: Food-grade/epoxy coatings (IPN8710) suitable for drinking water, no secondary pollution.
Thermal Stability: Resistant to high/low temperatures depending on coating material (FBE for high temp, PE for standard).
Strong Adhesion: Fusion bonding ensures the coating does not peel or scale.

6. End Preparation

Plain End (PE) / Beveled End (BE): For welding (coating repaired post-weld).
Threaded & Coupled (T&C): Common for small diameters (ERW substrate).
Flanged Ends: Coated flange connections for easy assembly.
Grooved Ends: For fire-fighting pipelines.
End Protectors: Plastic/steel caps to protect coating during transit.

7. Surface Treatment & Coating Options

Internal Coating: FBE, Epoxy, PE, PVC, Cement Mortar, IPN8710.
External Coating: 3PE, 3PP, FBE, Galvanized + Plastic, Coal Tar Epoxy.
Combo Solutions:

Internal FBE + External 3PE (Oil/Gas/Water)

Internal PE + External Galvanized (Fire-fighting/Drainage)

Internal Cement + External PE (Municipal Water)


8. Testing & Inspection

Coating Thickness Test: Magnetic gauge measurement.
Adhesion Test: Cross-cut or pull-off test.
Hydrostatic Test: 100% pressure test for substrate.
Holiday (Leak) Test: Spark testing for coating pinholes.
Dimensional Inspection: OD, WT, Length, Ovality.
Chemical & Mechanical: Substrate material certification (MTC provided).

9. Typical Applications

Drinking Water Supply: Municipal pipelines, residential water (hygienic coating).
Fire-Fighting Systems: Internal PE/External galvanized (smooth flow).
Oil & Gas: Anti-corrosion transmission (3PE + FBE).
Chemical Industry: Acid/alkali resistant pipelines.
Mining: Slurry and tailings (wear-resistant coating).
Marine/Offshore: Seawater desalination and piling (heavy corrosion zones).

10. Packing & Delivery

Packing: Bundle packing with steel strips, end caps, protective wrapping.
Shipping: Container (20ft/40ft) for standard lengths; Bulk vessel for oversized.
Marking: Heat number, OD, WT, Coating type, Standard, Manufacturer.


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