SSAW Carbon Steel Pipe with 3PE Coating
For demanding industrial and infrastructure projects requiring robust, long-lasting pipelines, our SSAW (Spiral Submerged Arc Welded) Carbon Steel Pipe with 3PE Coating stands as a premier solution. This product combines the structural integrity of spiral-welded steel pipe with the exceptional corrosion protection of a three-layer polyethylene coating (3PE), making it ideal for oil and gas transmission, water supply systems, piling, and dredging applications. We specialize in manufacturing pipes that meet the highest international standards. Our product range includes high-performance options such as the API 5L Large Diameter Spiral Pipe for energy transport, the ASTM A252 Spiral Piling Pipe for foundational support, the AWWA C200 Spiral Welded Steel Pipe for potable water, and specialized Large Diameter Spiral Pipe for Dredging operations. Each pipe is engineered for durability, reliability, and optimal performance in its specific environment.
The SSAW Carbon Steel Pipe with 3PE Coating is manufactured using a continuous spiral forming process, which creates a pipe with a consistent wall thickness and excellent hoop strength, capable of withstanding high internal pressures and external loads. The 3PE coating system, comprising an epoxy powder layer (FBE), a copolymer adhesive layer, and a tough polyethylene outer layer, provides a formidable barrier against corrosive elements, mechanical damage, and soil stress. This multi-layer protection significantly extends the service life of the pipeline, reducing maintenance costs and ensuring long-term operational safety.
Key Specifications of SSAW Carbon Steel Pipe with 3PE Coating
- Standards: API 5L, ASTM A252, AWWA C200, EN 10219, or customized specifications.
- Steel Grade: Typically GR.B, X42 to X80, or as per project requirement.
- Diameter Range (OD): From 406 mm (16") up to 2540 mm (100") and larger.
- Wall Thickness: 6 mm to 25.4 mm, depending on diameter and pressure class.
- Pipe Length: Single random length (~12m) or double random length (~24m), customizable.
- Coating Standard: DIN 30670, CSA Z245.21, ISO 21809-1, or equivalent for 3PE.
- Coating Thickness: Typically 1.8mm to 4.0mm, tailored to soil conditions and application.
- End Finish: Plain end, beveled end, or fitted with special connections.
- Application: Oil & gas pipelines, water transmission, piling foundations, dredging, structural columns.
Detailed Technical Data Table
| Parameter | Typical Value / Range | Remarks |
|---|---|---|
| Outside Diameter (OD) | 406mm - 2540mm | Can be produced beyond this range upon request. |
| Wall Thickness (WT) | 6.0mm - 25.4mm | Thickness tolerance adheres to relevant pipe standards. |
| Yield Strength (Min) | 245 MPa - 555 MPa | Varies with steel grade (e.g., GR.B, X42, X52, X70). |
| Tensile Strength (Min) | 415 MPa - 690 MPa | As per API 5L or other applicable material specifications. |
| 3PE Coating Adhesion | ≥ 70 N/cm (Pull-off test) | Ensures coating remains bonded under mechanical stress. |
| Cathodic Disbondment (65°C, 48h) | ≤ 8 mm radius | Test per ISO 21809-1, indicates excellent FBE layer performance. |
| Impact Resistance (-30°C) | ≥ 10 J/mm | Polyethylene layer maintains toughness in low temperatures. |
| Operating Temperature | -40°C to +80°C | Suitable for most global environmental conditions. |
The manufacturing process involves strict quality control at every stage, from steel coil inspection and edge preparation to automated submerged arc welding (SAW) and comprehensive non-destructive testing (NDT). After hydrostatic testing, the pipe surface is meticulously cleaned and heated before the 3PE coating is applied via electrostatic spraying and extrusion. This controlled process ensures a uniform, defect-free coating with superior bonding to the steel substrate.
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