DN300 Cost-Effective Pre-Insulated 3PP Steel Pipes with Corrosion Resistant

This product is a cost-effective, turnkey solution specifically designed for projects with stringent requirements for long-term thermal insulation efficiency and corrosion protection lifespan, such as municipal district heating, industrial steam transmission, district cooling, and chemical medium transportation. It successfully addresses industry pain points like uncontrollable quality, long construction periods, and high long-term energy consumption associated with traditional field-applied insulation.

Core Parameters (Strictly Aligned with Global Engineering Procurement Search Habits)

● Material & Specifications: Manufactured from high-strength carbon steel conforming to API 5L PSL2 standard, Grade B and above, ensuring fundamental mechanical properties. Product size: DN300 (NPS 12, OD 323.9mm), with wall thickness range from 6.35mm to 12.7mm, capable of meeting diverse pressure ratings from low-pressure water supply to medium/high-pressure oil & gas transmission.

● Process & Structure: Featuring a Three-Layer Polypropylene (3PP) Anti-Corrosion Coating System: a base layer of Fusion-Bonded Epoxy (FBE) for superior adhesion and cathodic disbondment resistance, a middle-layer polymer adhesive, and a top layer of highly weather-resistant Polypropylene (PP), ensuring stable performance in extreme temperatures from -30°C to 120°C. The pipes are pre-insulated with Polyurethane (PUR) Foam Insulation and a High-Density Polyethylene (HDPE) Casing, forming a complete pre-insulated pipe system that significantly reduces on-site installation complexity.

● Standards & Certifications: Production strictly adheres to the ISO 9001:2015 Quality Management System. Manufacturing and testing can be provided in accordance with international standards such as EN 253 (District heating pre-insulated pipe systems), AWWA C210/C213, and DIN 30678 based on project requirements.

● Surface Treatment: The 3PP coating achieves a dry film thickness of ≥ 2.5mm and undergoes ≥ 15kV holiday (pinhole) detection, ensuring a continuous, defect-free coating that guarantees corrosion protection for up to 30 years.

1. Performance Advantages: Speaking with Data, Addressing Key Decision-Maker Concerns

● Exceptional Corrosion Resistance & Extended Lifespan: The outer Polypropylene (PP) coating offers high impact resistance (≥ 5J) and excellent abrasion resistance, effectively withstanding impacts from transportation, installation, and soil/gravel. Its superior chemical corrosion resistance withstands most acids, alkalis, and salts, making it especially suitable for highly corrosive environments like coastal areas, saline-alkali lands, and chemical parks. Compared to traditional 3PE, 3PP performs exceptionally well in high-temperature corrosion protection.

● Long-lasting Thermal Efficiency & Energy Economy: The Polyurethane foam insulation features a low thermal conductivity of ≤ 0.033 W/(m·K), combined with the watertight HDPE casing, ensuring heat loss reduction of over 60% throughout the pipeline's lifecycle. This translates to substantial long-term energy cost savings for operators, achieving the optimal balance between "initial investment" and "total cost of ownership (TCO)."

● Excellent Mechanical Protection & Structural Integrity: The 3PP coating bonds tightly with the insulation and steel pipe, forming a composite pipe structure that significantly enhances the pipe's resistance to soil stress, ground movement, and water pressure, ensuring long-term safe operation in complex geological conditions.

2. Authoritative Compliance Certifications (Your "Credit Passport" for Global Procurement)

As a core export product of the YTDR Group, we provide a complete international certification package to clear obstacles for your project bidding and acceptance:

● Product Certifications: API 5L (Line Pipe), CE Marking (Compliant with EU Construction Products Regulation CPR), ISO 9001 Quality System.

● Third-Party Inspection: Can be arranged at any time with internationally recognized bodies like SGS, Bureau Veritas (BV), TÜV for Factory Audits, In-Process Inspection (IPI), and Pre-Shipment Inspection (PSI).

● Trade Documentation: Provides a full set of customs clearance and acceptance documents including Certificate of Origin (CO), Material Test Certificate (MTC), UN/UKCA Marking (for casing pipe), etc.

3. Deep Customization Capability (Meeting Your Unique Project Requirements)

We understand that standard products cannot cover all project needs. YTDR Group offers flexible engineering-driven customization services:

● Specification Customization: Non-standard wall thicknesses, lengths (up to 18 meters maximum), and special steel grades (e.g., X42-X70).

● Pre-fabricated Connection Solutions: Capable of beveling, flange welding, pre-insulated joint assembly, etc., enabling "ready-to-install" delivery, drastically reducing on-site construction time.

● Packaging & Marking: Provides export-grade fumigated wooden crates, steel-strapped pallets, and can print project logos, line numbers, QR codes for traceability as per your requirements, facilitating on-site management and asset tracking.

1. Dimensional Customization:

● Diameter & Wall Thickness: While 4020mm is our standard large diameter, we can adjust both OD and wall thickness according to your design specifications and pressure ratings.

● Pipe Length: Custom cut lengths from 6 to 18 meters, with precise beveling ends ready for field welding.

● Pipe Ends Configuration: Options include plain ends, beveled ends (30-37.5°), special tolerances, or flanged ends to match your connection requirements.

2. Material Specification:

● Steel Grade Selection: Available in various API 5L grades (B, X42, X46, X52, X56, X60, X65, X70) to match your pressure and mechanical requirements.

● Plate Specifications: Custom chemical composition and mechanical properties to meet specific environmental challenges (low temperature, sour service, etc.).

3. Coating System Customization:

● FBE Coating Thickness: Adjustable DFT (Dry Film Thickness) from 300μm to 1000μm based on corrosion protection requirements.

● Coating Type Variations: Single-layer FBE, dual-layer FBE, or composite systems (FBE primer with polyolefin topcoat) for enhanced mechanical protection.

● Special Formulations: High-temperature FBE (up to 150°C), UV-resistant FBE for exposed sections, or drinking water certified FBE formulations.