Advantages of PVC pipes:

1. It has good tensile and compressive strength, but its flexibility is not as good as other plastic pipes.

2. Low fluid resistance: The wall of PVC pipes is very smooth, and the resistance to fluid is very small. Its roughness coefficient is only 0.009, and its water transport capacity can be increased by 20% compared to cast iron pipes of the same diameter and 40% compared to concrete pipes

3. Excellent corrosion resistance and drug resistance: It has excellent acid, alkali, and corrosion resistance, and is not affected by moisture and soil pH. No anti-corrosion treatment is required when laying pipelines.

4. Has good water tightness: The installation of PVC pipes, whether connected by adhesive or rubber rings, has good water tightness.

5. Anti bite: It is not a nutrient source and therefore will not be eroded by rodents. According to experiments conducted by the National Health Foundation in Michigan, mice do not bite PVC pipes.

6. Performance testing: Curing time, shrinkage rate, splitting strength, tensile strength, peeling strength, thermal stability, applicable period, storage period, release of harmful substances.

process conditions

1. Drying treatment is usually not required.

2. Melting temperature: 185-205C

3. Mold temperature: 20~50C

4. Injection pressure: can be as high as 1500bar

5. Maintaining pressure: can be as high as 1000bar

6. Injection speed: To avoid material degradation, a considerable injection speed is generally required.

5. Runner and Gate: All conventional gates can be used. If processing smaller components, use needle shaped or submerged gates. For thicker components, use sector gates. The diameter of needle shaped or submerged gates should be 1mm; The thickness of the fan-shaped gate of PVC pipes shall not be less than 1mm

Storage precautions

1. For PVC pipes with fragile materials, they should be handled with care and stored properly. It is strictly prohibited to squeeze or invert them.

2. The PVC pipes stored in the warehouse should be classified and placed according to different materials, specifications, and functions, ensuring overall stability, complete labeling, and clear labeling.

3. Do a good job in fire prevention, theft prevention, freezing prevention, moisture prevention, and corrosion prevention, and regularly maintain ventilation.

4. Explosive and flammable substances should be stored separately, avoiding contact with PVC pipes, and regularly inspected.

5. When PVC pipes are stored in the warehouse, the custodian should prepare a purchase list and purchase list, and after passing the inspection, count and store them in the warehouse.