EN 10290 Liquid Applied PUR and PUR-MOD Coated Steel Pipe

EN 10290 Liquid Applied PUR and PUR-MOD Coated Steel Pipe

The EN 10290 standard defines the specifications for liquid applied Polyurethane (PUR) and Polyurethane Modified (PUR-MOD) coatings on steel pipes, offering a robust solution for enhancing the durability and performance of piping systems in demanding environments. These coatings provide superior protection against corrosion, abrasion, and chemical attack, with PUR coatings delivering flexibility and strong adhesion, while PUR-MOD coatings offer enhanced chemical resistance and improved mechanical properties. By adhering to the EN 10290 standard, manufacturers and engineers ensure that steel pipes are well-suited to withstand extreme temperatures, aggressive chemicals, and high moisture conditions, thereby extending their service life and reducing maintenance needs.

Specifications

Standard	EN 10290 Liquid Applied PUR and PUR-MOD Coated Steel Pipe
Applied Steel Service Pipe	API 5L/ISO 3183 Gr.B-X100, ASTM A53/A106 Gr.B, ASTM A333 Gr.1/3/6, ASTM A671/A672/A691
Processing ability	OD:38mm-1620mm; WT:2mm-30mm
Length	6-18m
Surface Preparation	ISO 8501-1/SIS 055900/DIN 55928 Sa 2.5/NACE No.2/SPCC SP10 (Near White Metal Finish)
Coating Structure	The coating shall consist normally of one layer of liquid product, applied by brush or by an airless spray technique.
Packing	1. Both ends of the pipe are beveled to 30°+5°/-0° according to ASME B16.25. 2. For large-diameter pipes (OD≥NPS 8″), each pipe is equipped with 3 anti-collision ropes (3 locations) and 2 slings, with plastic covers at the ends of the pipes, or reusable metal bevel protectors (with sealing cloth), loosely packed. 3. For small-diameter pipes (OD≤NPS 6″), each pipe is equipped with 3 anti-collision ropes (3 locations), plastic covers at the ends of the pipes, and 2 slings per bundle (the whole bundle can be wrapped in a woven bag according to the coating type or customer requirements) and tied with plastic strips (woven bags are placed underneath to protect the coating from scratches)
Technique	Coated on Seamless/ERW/HFW/LSAW/SSAW/JCOE/UOE/RBE Line Pipes
Service condition	Designed Working Temperature: -20℃ to +80℃; Alkaline or sour
Place of Origin	Made in China
MOQ	Depends on order quantity
Transportation	Railway, By Sea

This coating can be used for the protection of buried or submerged steel tubes for service at the following temperatures and with two thickness classes A (1 000 µm) and B (1 500 µm) based on the following combination.
Lower thickness can be agreed between the coating manufacturer and the purchaser.

Type	Temperature Range	Thickness Class
Type 1	-20°C to 40°C	Class A (1,000 μm) or Class B (1,500 μm)
Type 2	-20°C to 60°C	Class B (1,500 μm)
Type 3	-20°C to 80°C	Class B (1,500 μm)
Additional Notes:
Thickness Adjustment: Lower thickness can be agreed upon between the coating manufacturer and the purchaser.
Custom Temperature Ranges: Other temperature ranges can be agreed upon, with the requirement that tests be conducted at the specified temperatures.

Handling Temperature of the Coating

Type	Temperature Range
Type 1	-30°C to +40°C
Type 2 and 3	-30°C to +60°C

Service Temperature

Type	Temperature Range	Thickness Class
Type 1	-20°C to +40°C	Class A (1,000 μm) or Class B (1,500 μm)
Type 2	-20°C to +60°C	Class B (1,500 μm)
Type 3	-20°C to +80°C	Class B (1,500 μm)

Required Properties

Properties	Requirements	Subclause
Dry thickness of the coating system	Class A: 1,000 μm minimum	7.2
	Class B: 1,500 μm minimum
Hardness Shore “D”	Specified by the manufacturer	7.3
Appearance and continuity	Uniform color, smooth appearance, and free from defects	7.4
Cut back	150 ± 20 mm	7.5
Holiday detection	Free from holidays	7.6
	(23 ± 2)°C: 5 J x k x mm	7.7
	(-5 ± 3)°C: 3 J x k x mm
Adhesion test – Resistance to removal	(23 ± 2)°C: ≤ rating 3	7.8
	Maximum service temperature ± 2°C: ≤ rating 4
Adhesion test – Pull-off method	(23 ± 2)°C: 7 Mpa	7.9
	Maximum service temperature ± 2°C: Results for information
Cathodic disbondment	Average: ≤ 8 mm	7.10
	Maximum: ≤ 10 mm
Specific electrical insulation resistance	Minimum RsR_sRs​ after set number of days at constant temperature	7.11
Adhesion test after immersion in tap water	Results for information	7.12
Indentation resistance	(23 ± 2)°C: ≤ 0.2 mm	7.13
	Maximum service temperature ± 2°C: ≤ 30% of initial measured thickness
Thermal Ageing	Results for information	7.14
Flexibility	Results for information	7.15
Infra-red scan	Acceptable comparison with reference scan	7.16
Elongation	≥ 10%	7.17
Additional Notes:
Different Handling Temperatures: Different handling temperatures can be agreed upon as necessary.

EN 10290 is a European standard that specifies the requirements for liquid-applied coatings, including Polyurethane (PUR) and modified Polyurethane (PUR-MOD), on steel pipes used for various applications. These coatings are crucial for providing long-term protection against corrosion and mechanical damage, making them suitable for a wide range of demanding environments. Below is an overview of the applications for EN 10290 liquid-applied PUR and PUR-MOD coated steel pipes:

Applications of EN 10290 Liquid-Applied PUR and PUR-MOD Coated Steel Pipes

1. Oil and Gas Pipelines

• Onshore and Offshore Pipelines: EN 10290 PUR and PUR-MOD coatings are commonly used in the oil and gas industry for both onshore and offshore pipelines. These coatings offer excellent resistance to corrosion caused by exposure to harsh chemicals, saltwater, and other corrosive substances, ensuring the integrity of pipelines that transport crude oil, natural gas, and refined products.
• High-Pressure Pipelines: The durability and robustness of PUR and PUR-MOD coatings make them ideal for high-pressure pipelines, where the pipes must withstand significant mechanical stress and extreme temperatures without compromising the coating’s protective qualities.

2. Water Transmission Pipelines

• Potable Water Pipelines: EN 10290 coated steel pipes are used in the distribution of potable water. The coatings provide a barrier that prevents contamination of the water supply by protecting the internal pipe surface from corrosion, thereby ensuring the safety and quality of the drinking water.
• Wastewater and Sewerage Systems: PUR and PUR-MOD coatings are also applied to steel pipes in wastewater and sewerage systems. The coatings’ chemical resistance protects the pipes from the corrosive nature of sewage and industrial effluents, extending the service life of the infrastructure.

3. Industrial Applications

• Chemical Processing Plants: In chemical processing facilities, where pipes are exposed to aggressive chemicals, high temperatures, and abrasive substances, EN 10290 PUR and PUR-MOD coatings provide superior protection. This ensures the reliability of pipes used to transport chemicals, reducing the risk of leaks and environmental contamination.
• Mining Industry: The mining sector utilizes these coated pipes for the transportation of slurries, tailings, and other abrasive materials. The mechanical strength and abrasion resistance of PUR and PUR-MOD coatings are critical in these harsh environments, where pipes are subject to wear and tear.

4. District Heating and Cooling Systems

• Thermal Insulation: EN 10290 coated pipes are essential in district heating and cooling systems, where they transport hot or chilled water across long distances. The PUR coatings provide excellent thermal insulation, minimizing heat loss or gain, which enhances the efficiency of these systems and reduces energy costs.

5. Marine and Subsea Applications

• Subsea Pipelines: The superior resistance of PUR and PUR-MOD coatings to seawater corrosion makes them ideal for subsea pipelines, which are exposed to the harsh marine environment. These coatings protect the pipelines from corrosion, biofouling, and mechanical damage caused by currents, waves, and marine life.
• Port and Harbor Infrastructure: EN 10290 coated steel pipes are also used in constructing port and harbor facilities, such as jetties, piers, and underwater structures. The coatings protect steel components from the corrosive effects of saltwater, ensuring the longevity of these critical infrastructures.

6. Infrastructure Projects

• Bridges and Tunnels: Steel pipes coated with EN 10290 PUR and PUR-MOD are often used in infrastructure projects like bridges and tunnels. The coatings provide protection against corrosion in environments where pipes may be exposed to moisture, de-icing salts, and other corrosive elements.
• Fire Protection Systems: These coatings are also employed in fire protection systems, where they help maintain the integrity of steel pipes under high temperatures and during firefighting operations.