Plastic-lined steel pipe, also known as steel-plastic composite pipe, is a piping material that combines the mechanical properties of steel pipe with the corrosion resistance of plastic pipe. The base material can be either galvanized seamless or welded steel pipe. After undergoing a special treatment process, the inner wall is lined with food-grade polyethylene (PE) pipe of the same inner diameter as the galvanized pipe, after removing the weld ribs. This treatment ensures that the thickness of the polyethylene lining meets relevant standards. The pipe is then heat-pressed and shaped, making it an upgraded alternative to traditional galvanized pipe.
Plastic-lined steel pipe combines the advantages of high strength, high pressure resistance and corrosion resistance of steel pipe and the advantages of anti-aging, anti-scaling and wear resistance of plastic pipe, and realizes the complementary and optimization of pipe performance.
Types and Specifications
Plastic-lined steel pipe comes in various types, including steel-lined polypropylene (GSF.PP), steel-lined polyvinyl chloride (GSF.PVC), steel-lined polyethylene (GSF.PE), and steel-lined polyolefin (GSF.PO). These types of plastic-lined steel pipe are constructed with ordinary carbon steel as the main structure, and the inner lining is made of a thermoplastic with superior chemical properties, manufactured through cold-drawn composite or rotational molding processes.
Production Process
The production process of plastic-lined steel pipe significantly impacts its performance. This rib-embedded plastic-lined steel pipe utilizes a unique mechanical drawing and lamination technology. By reducing the diameter of the metal pipe, the inner plastic layer is compressed, achieving a permanent, optimal interference fit between the two materials. This technology also combines the uniquely designed patterned ribs on the inner surface of the welded pipe to embed themselves within the outer surface of the plastic pipe, along with physical and chemical modification of the plastic pipe prior to lamination, ensuring the pipe's stability and durability.
Advantages
1. Strong Corrosion Resistance: Excellent corrosion resistance, suitable for conveying media such as acids, alkalis, salts, and corrosive gases.
2. Excellent Mechanical Properties: Retains the mechanical strength and rigidity of steel pipes.
3. Easy to Clean: The smooth inner wall resists fouling, making it suitable for use in harsh environments.
4. Long Service Life: Special processing techniques significantly extend service life.
Our Factory
Hebei Yugang Pipe Manufacturing Co., Ltd. is located in the Yanshan Development Zone in Cangzhou, the heart of China's pipeline industry. Founded in 2005, the company transformed and upgraded in 2014 into a comprehensive group integrating pipeline technology, equipment manufacturing, and accessories production. In 2024, it was awarded the title of High-Tech Enterprise, demonstrating its innovative strength. Its main products include 3PE anti-corrosion steel pipes for oil and gas, spiral welded pipes, and insulated pipes. The company is equipped with five spiral pipe production lines, three anti-corrosion pipe production lines, six insulated pipe production lines, and two straight seam pipe production lines, with an annual production capacity of 300,000 tons. The company is ISO9001 certified, and its products comply with API Spec 5L/5CT/5B international standards.
Frequently Asked Questions (FAQ)
Q: What is the production cycle and delivery time?
A: Delivery time depends on order volume, specification complexity, and current production schedule. Standard products are generally delivered faster, while large orders or complex customizations may take longer. We will confirm the exact delivery schedule with you before placing an order.
Q: Do you support custom processing?
A: Yes. We offer customized design and production services for a variety of steel pipe products, and we can adjust dimensions, materials, and performance parameters to meet customer needs.
Q: Can I request sample testing?
A: We can provide samples of some products. Please contact the sales department for details on sample type and delivery procedures.
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