Product Description

Manufactured by spray or pour application of two-component liquid polyurethane (PU) onto blast-cleaned steel pipe surface, forming a seamless, elastomeric protective layer. Features excellent abrasion resistance, high mechanical strength, good cathodic disbondment resistance, and outstanding resistance to impact, cavitation, and seawater. Base pipe materials: carbon steel (API 5L Gr B, X42–X80, ASTM A106 Gr B, Q235B, Q355B) and stainless steel. Pipe outer diameter: 50mm – 1420mm. Wall thickness: 2.5–40mm. Standard length: 6m, 12m (custom). Coating thickness: 1.0mm – 5.0mm (standard 1.5–3.0mm). Coating color: typically dark grey (RAL 7016) or custom. End treatment: cut-back (bare pipe 50–150mm for field welding). Service temperature: -60°C to +100°C (some formulations to +120°C). Hardness: 80–90 Shore A. Tensile strength: ≥ 20 MPa. Elongation at break: ≥ 400%. Abrasion resistance: extremely high (≤ 50mm³ loss per Taber test). Holiday test: 5–15kV spark test. Meets ISO 21809-11, DIN 30670, AWWA C222, or GB/T 24527 standards. Custom coating thickness, colors, and cut-back length available.

Parameter

Product Name	Polyurethane Coated Steel Pipe (PU / PUR 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; stainless steel (304/316L) available
Base Pipe Type	Seamless, ERW, LSAW, SSAW
Pipe Outer Diameter	50 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 Material	Two-component liquid polyurethane (elastomeric)
Coating Application	Spray or pour (solvent-free)
Coating Thickness	1.0 mm – 5.0 mm (standard: 1.5 – 3.0 mm)
Coating Color	Dark grey (RAL 7016 standard), custom RAL available
End Treatment	Cut-back – bare pipe ends 50 – 150 mm for field welding
Service Temperature	-60°C to +100°C (continuous), up to +120°C (intermittent)
Hardness	80 – 90 Shore A
Tensile Strength	≥ 20 MPa
Elongation at Break	≥ 400%
Abrasion Resistance	≤ 50 mm³ (Taber test, H22 wheels, 1000 cycles, 1000g)
Impact Resistance	≥ 20 J (depending on thickness)
Cathodic Disbondment	≤ 8 mm (28 days, 65°C)
Water Absorption	≤ 1.0% (7 days at 25°C)
Adhesion (Pull-off)	≥ 10 MPa (or cohesive failure in coating)
Holiday Test (Porosity)	Spark test 5 – 15 kV (depending on coating thickness), zero holidays
UV Resistance	Good (requires UV-stabilized formulation for continuous outdoor exposure)
Surface Preparation	Blast cleaning to Sa 2.5, anchor profile 40 – 100 µm
Standards Compliance	ISO 21809-11, DIN 30670, AWWA C222, GB/T 24527
Custom Options	Coating thickness, color, cut-back length, UV-stabilized or high-temperature formulation

Application description

Widely used in offshore pipelines (risers, subsea flowlines), directional drilling, slurry transport, sewage outfall lines, and water intake systems. Also suitable for abrasive media transport, pipe jacking projects, and coastal protection works. The high abrasion, impact, and corrosion resistance make it ideal for harsh environments including rock contact, high flow velocity, and marine conditions.

Production description

Steel pipe is shot blasted to Sa 2.5 and preheated. Two-component liquid polyurethane is mixed and applied by spray or pour onto the pipe surface, forming a seamless elastomeric layer. The coating cures without heating. Coated pipe is inspected (holiday test, thickness) and ends cut back for field welding.

Shipping Packaging

For export, polyurethane 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 foam or polyethylene film. Labels include grade, coating thickness, dimensions, and heat number for safe sea freight.

Why Choose Us?

Factory Strength: Direct manufacturer with automated shot blasting lines, polyurethane spray/pour application equipment, and in-house curing/holiday testing, producing PU coated pipes from 50mm to 1420mm OD to ISO 21809-11, DIN 30670, AWWA C222, and GB/T 24527 standards.

Quality Assurance: Strict control of coating adhesion (pull-off ≥10 MPa), holiday-free (5-15kV spark test), abrasion resistance (≤50mm³ Taber loss), and mechanical properties (tensile ≥20MPa, elongation ≥400%); 100% thickness and porosity inspection.

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

Customization & Service: Wide base pipe grades (API 5L Gr B–X80, ASTM A106, Q235B/Q355B, stainless steel), diameters 50–1420mm, coating thickness 1.0–5.0mm, custom colors (RAL), UV-stabilized or high-temperature formulations, cut-back length custom, and fast lead times.

Export Packaging: Plastic end caps + foam/polyethylene 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 polyurethane coated pipes to prevent coating damage?

Store on dry, level ground on padded wooden sleepers with soft separators between layers. Keep pipes bundled and elevated. Avoid rolling, dragging, or impact that could cut or tear the elastomeric coating. For outdoor storage, UV-stabilized PU grades are recommended; standard PU should be covered with light-blocking tarpaulin within 3 months. Repair deep scratches with polyurethane repair compound.

2. What is the difference between polyurethane (PU) coating and 3PE or FBE coatings?

PU coating is a flexible elastomer with extremely high abrasion resistance (≤50mm³ Taber loss) and good impact resistance, ideal for offshore, directional drilling, pipe jacking, and slurry transport where mechanical damage is severe. 3PE offers thick, rigid protection for buried pipelines. FBE provides excellent adhesion and cathodic disbondment at lower thickness. Choose PU for dynamic mechanical stress, 3PE for general buried, FBE for high-temperature or thin-film applications.

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

Yes, provided the polyurethane formulation meets drinking water standards (e.g., NSF/ANSI 61, ACS, WRAS). We offer drinking water grade PU coatings that are inert, non-toxic, and resistant to disinfectants. Request certification documentation for compliance.

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.

Customer visit