CAN/CSA Z245.21 Three-Layer Polyethylene (3LPE) Coated Line Pipe

CAN/CSA Z245.21 Three-Layer Polyethylene (3LPE) Coated Line Pipe

CAN/CSA Z245.21 three-layer polyethylene (3LPE) coated line pipes are designed to offer outstanding protection against corrosion and mechanical damage in various environmental conditions. Complying with the stringent standards of CAN/CSA Z245.21, these pipes feature a three-layer coating system: a fusion bonded epoxy (FBE) base layer, an adhesive intermediate layer, and a tough polyethylene outer layer. The 3LPE coating system protects against corrosion, abrasion, and chemical damage, and offers excellent resistance to cracks, punctures, and tears. The pipe is engineered for extreme temperatures (-40°C to 80°C). It is suitable for transporting oil, gas, and petrochemical products and for use in onshore and offshore platforms and land-based infrastructure projects.

Specifications

Standard	CAN/CSA Z245.21 Three-Layer Polyethylene (3LPE) Coated Line 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	Seamless: OD: 21.3-1400mm WT: 2-200mm Welded: OD: 21.3-1422mm WT: 3.2-60mm
Length	5.8m/6m/11.8m/12m
Surface Preparation	ISO 8501-1/SIS 055900/DIN 55928 Sa 2.5/NACE No.2/SPCC SP10 (Near White Metal Finish)
Coating Structure	First Layer: Epoxy Primer Layer; Second Layer: Adhesive Layer; Third Layer: High-density Polyethylene Layer
Packing	1. Both pipe ends are beveled to 30°+5°/-0° according to ASME B16.25. 2. For large-diameter pipes (OD≥NPS 8″), each pipe is equipped with three anti-collision ropes (3 locations) and two 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 three anti-collision ropes (3 locations), plastic covers at the ends of the pipes, and two 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	Design working temperature ranges: -40℃ to +80℃; alkaline or sour service
Place of Origin	Made in China
MOQ	Depends on the order quantity
Transportation	Railway, By Sea

Coating thickness for CAN/CSA Z245.21 Three-Layer Polyethylene (3LPE) Coating

Layer	Thickness Range
Fusion Bonded Epoxy (FBE) Layer	100 – 200 microns (4 – 8 mils)
Adhesive Layer	200 – 400 microns (8 – 16 mils)
Polyethylene Layer	1.8 – 3.0 mm (70 – 120 mils)

CAN/CSA Z245.21 Three-Layer Polyethylene (3LPE) Coating Performace

Property	Performance
Adhesion to Pipe Surface	Excellent
Impact Resistance	High
Cathodic Disbondment Resistance	Superior
Thermal Resistance	Up to 85°C (185°F)
Chemical Resistance	Strong against various chemicals
Abrasion Resistance	Exceptional
UV Resistance	Good

3LPE Coating Production Process

Applications of 3LPE Coated Line Pipe

3LPE coated line pipes are used in a variety of applications, similar to 3LPP coated pipes, with some specific advantages in certain conditions:

Oil and Gas Pipelines

Onshore and Offshore Pipelines: Used extensively for transporting oil and gas due to their excellent resistance to corrosive environments and mechanical damage.
Subsea Pipelines: Ideal for subsea applications where the pipes face harsh marine conditions and mechanical stresses.

Water Pipelines

Potable Water Pipelines: Suitable for carrying potable water due to their non-toxic nature and excellent corrosion protection.
Sewage and Wastewater Pipelines: These are used in sewage and wastewater systems to protect against corrosion and mechanical wear.

Chemical and Petrochemical Pipelines

Transport of Chemicals: The chemical resistance of polyethylene makes these pipes suitable for transporting various chemicals.
Petrochemical Plants: Used in environments where pipes are exposed to aggressive chemicals and require reliable protection.

Industrial Applications

Cooling Water Systems: Employed in cooling water systems in industrial facilities for their durability and corrosion resistance.
Slurry and Mining Pipelines: Used in mining to transport abrasive slurries due to their mechanical strength.

District Heating and Cooling Systems

District Heating Pipelines: These are suitable for district heating systems to transport hot water or steam, providing thermal insulation and corrosion protection.
District Cooling Pipelines: Transport chilled water in district cooling systems and protect against external moisture and corrosion.

Renewable Energy Projects

Geothermal Pipelines: Ideal for geothermal energy projects where the pipes transport corrosive geothermal fluids.
Hydropower Plants: Used in hydropower plants for their resistance to continuous water flow and mechanical stresses.