What is Plastic Pipe?

Plastic pipes are tubular products made from high-molecular polymers through molding processes such as extrusion, injection molding, hot-melt molding, and electrofusion. Compared to traditional metal pipes, plastic pipes have significant advantages in terms of weight, corrosion resistance, ease of processing, and service life, and have been widely adopted in numerous industries including water supply, drainage, chemical, pharmaceutical, photovoltaic, and semiconductor. Below, we will elaborate on Plastic Pipes from three dimensions: material properties, classification, and technological support, while also highlighting the core competitiveness of Jiangsu Leiting Precision New Materials Co., Ltd.

Material Properties – Advantages of High-Molecular Polymers

1. Polyethylene (PE) Series
Using linear low-density polyethylene (LLDPE) or high-density polyethylene (HDPE) as the base material, these pipes feature a regular molecular chain arrangement and possess excellent impact resistance, low-temperature resistance, and chemical corrosion resistance. They are commonly used in urban water supply, gas transmission, and underground drainage systems.

2. Polyvinyl Chloride (PVC) Series: By adding plasticizers, stabilizers, and other additives, the pipes gain flexibility and weather resistance. PVC-U (unplasticized) is suitable for drinking water and industrial water; PVC-C (plasticized) is commonly used for sewage and exhaust.

3. Polypropylene (PP) Series: PP-R (hot melt) pipes excel in high-temperature resistance (up to 95℃) and chemical resistance, making them suitable for transporting hot water, steam, and some chemical media.

4. Other High-Performance Materials: Such as polyamide (PA) composite pipes and polytetrafluoroethylene (PTFE) lined pipes, providing specialized solutions for extreme corrosion or high-pressure conditions.

5. Common characteristics of these polymer materials include: lightweight (density approximately 0.9-0.95 g/cm³), corrosion resistance (virtually unaffected by acids, alkalis, and salts), ease of processing (allowing for hot melt, electrofusion, and mechanical connections), and long service life (50-100 years), making them the preferred materials in modern piping systems.

Is the Plastic Pipe Series suitable for drinking water systems?

1. National Standard Approval: GB/T13663.5-2018 clearly stipulates that polyethylene (PE) pipe systems can be used in general-purpose drinking water distribution systems under conditions of water temperature ≤40℃ and working pressure ≤2.0MPa.

2. International Standard Compatibility: ASTM D3035-21 further confirms that PE plastic pipes, provided they meet the corresponding specifications, can be safely used in drinking water and non-drinking water systems.

3. Company Advantages: Jiangsu Leiting uses raw materials and processes that comply with GB/T13663.5 and ISO4427-5 standards. Its products have passed multiple domestic and international tests, meeting drinking water hygiene requirements and suitable for the water supply needs of high-end residences, commercial buildings, and industrial parks.

How to achieve local isolation for maintenance in a Plastic Pipe Series network?

1. Isolation Valve Configuration: Installing electrofusion or mechanical isolation valves at key nodes in the pipeline network allows for the rapid closure of local sections without affecting the overall water supply, enabling safe maintenance.

2. Segmented Valve Layout: Isolation valves are installed approximately every 100m, working in conjunction with an automated monitoring system to achieve remote closure and pressure relief, reducing the risks associated with manual operation.

3. Maintenance Process: After closing adjacent upstream and downstream valves, local purging, flushing, and replacement of damaged pipe sections are performed. After completion, valves are gradually restored, and pressure tests are conducted to ensure system integrity.

4. Company Strength: The company possesses complete valve R&D and manufacturing capabilities, enabling it to provide customized local isolation solutions to meet the rapid maintenance needs of demanding industries such as semiconductors, photovoltaics, and pharmaceuticals.

How to prevent performance degradation of Plastic Pipe Series due to sunlight, freezing, and contamination?

1. UV Resistance Treatment: Adding UV absorbers or light stabilizers to the pipe material, and using an external protective coating, significantly improves the weather resistance of outdoor pipelines, preventing aging and brittleness.

2. Antifreeze Measures: In low-temperature regions, use PE-RT or HDPE pipes with low-temperature resistant formulations, and preheat the pipe sections before laying, using insulated sleeves or adding insulation layers to prevent expansion and cracking caused by freezing.

3. Pollution Prevention Strategy: Strict cleaning and disinfection are carried out before and after construction. The pipes are flushed with drinking water and then soaked in a disinfectant solution containing 20-30 mg/L of available chlorine for 24 hours. They are then flushed again until they meet drinking water standards before being put into use.

4. Company Technical Support: Jiangsu Leiting has patented its UV anti-aging formula in its material formulation and has passed multiple antifreeze and anti-corrosion tests, providing customers with long-term stable pipe solutions.

What surface treatments are required for Plastic Pipe Series before installation?

1. Water Pressure Test: The test pressure is 1.5 times the working pressure (not less than 0.8 MPa), and it is conducted 24 hours after bonding to verify the sealing performance of the joints.

2. Flushing: The pipes are flushed with drinking water at a flow rate of ≥0.8 m/s to ensure no residual impurities remain inside.

3. Disinfection: The pipes are soaked in a disinfectant solution containing 20-30 mg/L of available chlorine for 24 hours, and then flushed again until the effluent meets drinking water standards.

4. Inspection and Recording After completing the above steps, record key parameters such as test pressure, rinsing flow rate, and disinfection concentration to form a complete delivery report for easy traceability and quality management later.