High-density polyethylene (HDPE) pipes are widely used in municipal water supply, gas transmission, industrial pipelines and other fields due to their excellent corrosion resistance, flexibility and long life. Among them, HDPE 315mm PE100 pipes have become the preferred material for large-flow transmission systems due to their excellent mechanical properties and environmental protection characteristics. This article will explore its characteristics, production process, application scenarios and future development trends in depth.
1. Material and grade
HDPE PE100 is a high-grade product of high-density polyethylene pipes. Compared with PE80, its ring stiffness, compressive strength and temperature resistance are better. PE100 is produced by bimodal or multimodal polymerization process, with a more uniform molecular weight distribution and both rigidity and toughness.
2. Core performance
Corrosion resistance: It can resist acids, alkalis, salts and most chemical media, and is suitable for chemical industry, sewage treatment and other fields.
Flexibility: The elongation at break exceeds 500%, it can adapt to foundation settlement, and has excellent seismic resistance.
Long life: Under normal use conditions, the service life can reach more than 50 years.
Lightweight: The density is only 1/8 of that of steel pipes, and the transportation and installation costs are low.
Hygiene and safety: It complies with GB/T 17219-1998 standards and is suitable for drinking water transportation.
3. Advantages of 315mm specifications
315mm is a large-diameter pipe, suitable for municipal water supply, gas trunk pipelines, industrial fluid transportation and other scenarios. Its high flow capacity and compressive strength (PN10-PN16) make it an ideal choice for medium and high pressure pipelines.
1. Raw materials and polymerization process
PE100 usually adopts bimodal polymerization technology, and controls the molecular weight distribution through two series reactors to optimize the long-term crack resistance of the pipe. The raw materials are mainly imported resins such as Borealis and Basel to ensure product stability.
2. Extrusion molding
315mm PE100 pipes are produced by single-screw or twin-screw extruders. The key points of process control include:
Melt temperature: 200-230℃ to avoid high-temperature oxidation.
Cooling and shaping: water cooling or vacuum shaping to ensure uniform wall thickness.
Carbon black addition: 2%-2.5% carbon black enhances UV resistance and is suitable for open-air environments.
3. Connection technology
Hot-melt butt: suitable for large-diameter pipes, and the interface strength is higher than the pipe body.
Electrofusion connection: high degree of automation, suitable for complex construction environments.
1. Municipal water supply system
HDPE 315mm pe100 pipes are widely used in urban water supply trunk pipes. Their smooth inner wall and low resistance can reduce pumping energy consumption.
2. Gas transportation
As PE100 gas pipes, their resistance to slow crack growth (SCG) and rapid crack propagation (RCP) is better than traditional steel pipes, and they are safer.
3. Industrial pipelines
Applicable to chemical, mining, sewage treatment and other fields, resistant to acid and alkali corrosion, and reduce maintenance costs.
4. Agricultural irrigation
Large diameter hdpe pipe can be used for drip irrigation system trunk pipes, with strong weather resistance and suitable for long-term outdoor use.
1. Purchase points
Certification standards: Check GB/T 13663 (water supply pipe) or GB 15558.1 (gas pipe) certification.
Brand reputation: give priority to pipes produced with raw materials from Borealis Chemical.
2. Construction precautions
Hot melt temperature control: 260±5℃, avoid over-melting or cold welding.
Underground protection: add casing to prevent freezing and avoid mechanical damage.
HDPE 315mm pe100 pipe has become the core material of modern pipeline engineering due to its advantages of high strength, corrosion resistance and long life. With technological progress and policy promotion, its application scope will be further expanded, especially in emerging fields such as smart water services and hydrogen energy transportation. In the future, the industry needs to strengthen standardized production and green manufacturing to meet the challenges of global competition.
