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Frequently Asked Questions

In which industries are PVC pipes primarily used, and how should the right type be selected for different applications?

PVC pipes are widely used in three major sectors: municipal water supply and drainage, residential plumbing and electrical renovation, and landscaping irrigation. Municipal projects utilize UPVC double-wall corrugated pipes, which must offer high compressive strength and corrosion resistance, with a service life of 30 to 50 years. Residential applications employ PVC conduit and water supply pipes, prioritizing environmental safety and electrical insulation. Landscaping irrigation relies on UPVC pipes modified with anti-aging additives, offering installation costs approximately 25% lower than those of concrete pipes.

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What are the latest development trends and technological upgrades in the PVC pipe industry for 2026?

The PVC pipe industry is moving in three directions toward 2026: stricter environmental standards, with a complete phase-out of lead-salt stabilizers in favor of lead-free, eco-friendly formulations; technological upgrades, utilizing modification techniques to improve low-temperature impact resistance by approximately 20%; and deeper market segmentation, with the development of specialized products for home renovation, municipal infrastructure, and agricultural irrigation. When purchasing, consumers should look for branded products that comply with the latest national standards and check the relevant environmental test reports.

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What is PVC pipe? What are its main classifications and suitable applications?

PVC pipes are plastic pipes manufactured through high-temperature extrusion using polyvinyl chloride (PVC) resin as the primary raw material, accounting for approximately 40% of the domestic pipe market. They are categorized into three types based on application: water supply pipes (compliant with GB/T 10002.1-2023; for municipal water supply), drainage pipes (compliant with GB/T 5836.1-2018; for building drainage), and electrical conduits (compliant with JG 3050-1998; for cable routing and wiring). High-quality PVC pipes feature a tensile strength of ≥40 MPa and a normal service life exceeding 50 years.

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What is the working principle of PVC pipes? What are the differences between the various types of PVC pipes?

PVC pipes perform their functions based on the physical properties of the material: water supply pipes utilize smooth inner walls to reduce flow resistance and dense outer walls to block corrosive substances, with a pressure rating of 1.0–2.5 MPa; electrical conduits rely on insulating properties to prevent electrical conduction and a rigid structure to withstand external crushing forces. Water supply pipes have wall thicknesses of 2.0–10 mm and must comply with drinking water hygiene standards, whereas electrical conduits have wall thicknesses of 1.2–2.0 mm and do not need to meet drinking water standards; the two types are not interchangeable.

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What common issues should be considered regarding the purchase, installation, and maintenance of PVC pipes?

PVC pipes function based on their material properties: water supply pipes utilize smooth inner walls to reduce flow resistance and dense outer walls to block corrosive substances, with a pressure rating of 1.0–2.5 MPa; electrical conduits rely on insulating properties to prevent electrical conduction and a rigid structure to withstand external crushing forces. Water supply pipes (wall thickness 2.0–10 mm) must meet drinking water hygiene standards, whereas electrical conduits (wall thickness 1.2–2.0 mm) do not; the two types are not interchangeable. When purchasing, assess quality by examining the appearance (smooth surface, free of air bubbles), checking the weight, and verifying certification markings; common sizes for residential drainage pipes are 110 mm and 50 mm, while electrical conduits typically use 16 mm and 20 mm. Installation involves standard steps: cleaning the joints, trial assembly, applying adhesive, and pressure testing; pipes of different materials should not be connected directly but rather joined using adapters. For maintenance, clear minor blockages with a drain snake and repair small cracks with PVC repair adhesive, avoiding the use of highly corrosive drain cleaners.

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