Product Description

Produced by applying coal tar epoxy coating onto blasted steel pipe surface in multiple layers, often reinforced with fiberglass cloth. Features excellent corrosion resistance, good cathodic disbondment resistance, strong adhesion, and low water absorption. Base pipe materials: carbon steel (API 5L Gr B, X42–X80, ASTM A106 Gr B, Q235B, Q355B). Pipe outer diameter: 60.3mm – 1420mm. Wall thickness: 2.5–40mm. Standard length: 6m, 12m. Coating structure: primer + coal tar epoxy (one or more coats) + fiberglass reinforcement (optional). Total dry film thickness: 300µm – 1000µm (standard: 400–600µm). Color: black or dark brown. End treatment: cut-back (50–100mm bare pipe for welding). Application temperature: -40°C to +80°C. Coating adhesion: ≥ 10 MPa (pull-off). Holiday test: 5kV spark test. Meets AWWA C210, SY/T 0447, or GB/T 21238 standards. Custom coating thickness, reinforcement layers, and cut-back length available.

Parameter

Product Name	Coal Tar Epoxy Coated Steel Pipe (CTE Coated Pipe)
Base Pipe Materials	Carbon steel: API 5L Gr B, X42, X46, X52, X56, X60, X65, X70, X80; ASTM A106 Gr B; Q235B, Q355B
Base Pipe Type	Seamless, ERW, LSAW, SSAW
Pipe Outer Diameter	60.3 mm – 1420 mm (2" – 56")
Wall Thickness	2.5 mm – 40 mm (depending on diameter and grade)
Standard Length	6 m, 12 m (custom up to 18 m)
Coating Type	Coal Tar Epoxy (CTE) – with or without fiberglass reinforcement
Coating Structure	Primer + 1-3 coats of coal tar epoxy; optional fiberglass cloth between coats
Total Dry Film Thickness	300 µm – 1000 µm (standard: 400 – 600 µm)
Number of Coats	2 or 3 coats (reinforced) or 1-2 coats (non-reinforced)
Coating Color	Black or dark brown
End Treatment	Cut-back – bare pipe ends 50 – 100 mm for field welding
Service Temperature	-40°C to +80°C (continuous), up to +100°C intermittent
Coating Adhesion (Pull-off)	≥ 10 MPa (or as specified per standard)
Holiday Test (Porosity)	5 kV spark test, zero holidays
Cathodic Disbondment	≤ 8 mm (28 days, 65°C, test per NACE TM0186)
Water Absorption	≤ 0.1% (after 7 days at 25°C)
Impact Resistance	≥ 5 J/mm (depending on coating system)
Chemical Resistance	Good resistance to diluted acids, alkalis, salts, crude oil, and natural gas
Surface Preparation	Near-white metal blast cleaning (Sa 2.5) with anchor profile 40-100 µm
Standards Compliance	AWWA C210, SY/T 0447, GB/T 21238 (or customer specification)
Custom Options	Coating thickness, number of reinforcement layers, cut-back length, special colors

Application description

Widely used in buried water transmission pipelines, sewage systems, oil and gas gathering lines, and cooling water circuits in power plants. Also suitable for underground fire water systems, irrigation projects, and pipelines in highly corrosive soil environments. The CTE coating provides excellent long-term protection against soil stress, moisture, and chemicals, extending service life.

Production description

Steel pipe is shot blasted to Sa 2.5. Primer is applied, followed by multiple coats of coal tar epoxy with optional fiberglass reinforcement between coats. Each coat is cured. The coated pipe is inspected for thickness and porosity (5kV spark test), and ends are cut back for field welding.

Shipping Packaging

For export, CTE coated pipes are fitted with plastic end caps, bundled with wooden separators and steel straps, packed on ISPM-15 pallets or steel skids, and protected with edge protectors. Coated surfaces may be wrapped with moisture-proof polyethylene. Labels include grade, coating thickness, dimensions, and heat number for safe sea freight.

Why Choose Us?

1.Factory Strength: Direct manufacturer with shot blasting lines, multi-coat spraying systems, and fiberglass wrapping equipment, producing CTE coated steel pipes from 60.3mm to 1420mm OD to AWWA C210, SY/T 0447, and GB/T 21238 standards.

2.Quality Assurance: Strict control of coating adhesion (pull-off ≥10 MPa), holiday-free (5kV spark test), cathodic disbondment, and dry film thickness; reinforced with fiberglass for enhanced mechanical strength; 100% porosity and thickness inspection.

3.Certifications & Reports: Mill test certificates for base pipe and coating materials with each shipment; third-party inspections (SGS, BV) and coating test reports (adhesion, thickness, porosity, cathodic disbondment) available upon request.

4.Customization & Service: Wide base pipe grades (API 5L Gr B–X80, ASTM A106, Q235B/Q355B), diameters 60.3–1420mm, coating thickness 300–1000µm, number of reinforcement layers (1–3), cut-back length custom, and fast lead times.

5.Export Packaging: Plastic end caps + moisture-proof wrapping + wooden separators + steel strapping + ISPM-15 pallets/steel skids + edge protectors + clear labeling for safe sea freight and coating protection.

FAQ

1. How to store CTE coated steel pipes to prevent coating damage?

Store on dry, level, padded supports (wooden sleepers with soft covering), keep pipes bundled and elevated. Avoid dragging or rolling pipes over sharp or abrasive surfaces. For outdoor storage, cover with tarpaulin to prevent dirt accumulation and UV exposure. Minor coating chips should be repaired with coal tar epoxy repair compound.

2. What is the difference between coal tar epoxy (CTE) and 3PE or FBE coatings?

CTE coating is a solvent-based epoxy with coal tar, applied in liquid form with optional fiberglass reinforcement. It is economical and provides excellent moisture resistance and cathodic disbondment, suitable for mildly corrosive buried environments. 3PE offers thicker, more abrasion-resistant coating for rocky terrain. FBE provides outstanding adhesion and high-temperature resistance. Choose CTE for water pipelines and general anti-corrosion where high impact resistance is not critical.

3. Can CTE coated pipes be used for drinking water transmission?

Yes, when the coating formulation meets potable water standards. Our CTE coating system can be supplied with materials certified for drinking water contact (e.g., AWWA C210 or local health approvals). For such applications, ensure proper curing and avoid any leaching. We can provide compliance documentation upon request.

CLIENT FEEDBACK

Has a professional foreign trade team and a well-established export service system. We have built long-term and stable cooperation relationships with customers from Southeast Asia, the Middle East, Africa, South America, and other regions.

CUSTOMER VISIT

We sincerely welcome global partners to contact us for mutual growth. With high-quality products and professional service, we look forward to working with you to create a prosperous future together.

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