PPR, PE, PVC, HDPE pipe how to distinguish?(3)

PVC tubing

U-pvc is also known as hard PVC, it is vinyl chloride monomer polymerization reaction and made of amorphous thermoplastic resin with certain additives (such as stabilizer, lubricant, filler, etc.) composition. In addition to additives, the method of blending with other resins is also adopted, so that it has obvious practical value. These resins are CPVC, PE, ABS, EVA, MBS and so on.

UPVC has high melt viscosity and poor fluidity. Even if the injection pressure and melt temperature are increased, the fluidity will not change much. In addition, the resin molding temperature and thermal decomposition temperature is very close, can be molding temperature range is very narrow, is a difficult molding material.

The characteristics of PVC

1. Light quality, convenient handling and loading and unloading: PVC pipes are light in texture, convenient handling, loading and unloading and construction, and save labor.

2. Excellent chemical resistance: PVC pipe has excellent acid resistance, alkali resistance and corrosion resistance, which is very suitable for chemical industry.

3. Small resistance: PVC pipe wall is smooth, small resistance, its friction coefficient is only 0.009.

4. Good electrical insulation: PVC pipe has excellent electrical insulation performance, suitable for the protection of wires and cables.

5. Easy construction: PVC pipe and pipe fitting combination construction fast, low construction cost.

6. Does not affect the water quality: PVC pipe is confirmed by the dissolution test does not affect the water quality, and is the best pipe for tap water piping.

7. High mechanical strength: the water pressure resistance, external pressure resistance and impact resistance of PVC pipe are very high, which is suitable for piping engineering under various conditions.

Characteristics of PVC drainpipe

1. The surface hardness and tensile strength of the pipe are excellent, and the pipe safety factor is high.

2. The linear expansion coefficient of pipeline is small, 0.07mm/℃, and the deformation is small under the influence of temperature. Low thermal conductivity and elastic modulus, excellent freezing resistance compared with cast iron drainpipe.

3. The pipe and fittings can be connected by bonding. The construction method is simple, the operation is convenient and the installation efficiency is high.

4.Good aging resistance, normal service life can reach more than 50 years.

5. The pipeline has excellent corrosion resistance to inorganic acid, alkali and salt, which is suitable for industrial sewage discharge and transportation.

6. The friction coefficient of the pipeline is small, the water flow is smooth, it is not easy to block, and the maintenance workload is less.

7. Material oxygen index is high, with self-extinguishing.