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Special features and advantages of NPVC pipes |
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| NPVC pipes |
Here are the main advantages of non-plasticized polyvinylchloride (NPVC) pipes are:
- no weld is required when assembling;
- bell-mouthed NPVC pipes are easily connected, hence construction and maintenance are simple and inexpensive.
Besides, NPVC pipes possess extra benefits:
- Low weight. Specific gravity is 5 times less than that of steel pipes
- No corrosion. Resistance of NPVC to acids, alkalis and salts is incomparably high than those of other materials.
- Hygiene and ecological safety. No color or smell is rendered to transported water, no sediment-assisting properties.
- Excellent hydraulic properties.Low hydraulic resistance, throughput capacity remains stable during lifetime.
- High elasticity and resistance to water-hammers
- Specific heat conductivity is around values of thermal insulators. The temperature of transported matter stays steady regardless of outer temperature fluctuations.
- Excellent electrical insulation.Damage and failure of pipes as a result of electrical corrosion is absolutely impossible.
- NPVC pipes are non-toxic, non-explosive, lowly flammable; combustion temperature is 500°C (932,00°F).
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Main physical and mechanical properties of polyvinylchloride, polyethylene and polypropylene for comparison
| Property |
HDPE |
LDPE |
PVC |
PP |
Density, g/cm3 3 |
0,94-0,96 |
0,91-0,93 |
1,4 |
>0,91 |
Calculated coefficient of linear expansion, mm/(m*°С) |
0,2 |
0,2 |
0,07 |
0,15 |
Design factor of tension fluidity, МPа |
20-30 |
10 |
50-56 |
25-28 |
Extension fluidity limit, МPа |
19-25 |
20-38 |
30-50 |
28-35 |
Tensile strength (at breakage), MPa |
800 |
600 |
50 |
350 |
Heat conductivity, Wt/(m*°С) |
0,42 |
0,35 |
0,15-0,25 |
0,28 |
Flammability |
"Flammable" |
"Flammable" |
"Lowly flammable" |
"Flammable" |
Lifetime period, years |
50 |
50 |
50 |
50 |
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