PRESSURE NOMINAL - PN
PE pipes are produced in different pressure grades (PN grades), which indicates the pressure in bars the pipe can support with water at 20°C.
The pressure grades available according to European standards are as follows:
- PN 2.5 - max pressure 2.5 bar
- PN 4-max pressure 4 bar
- PN 6-max pressure 6 bar
- PN 10 - max pressure 10 bar
- PN 16-max pressure 16 bar
- 1 bar 10 Pa (N/m²)=0.1 N/mm² = 10,197 kp/m² = 10.20 m H,O=0.9869 atm = 14.50
- psi (lb/in) 10° dyn/cm² = 750 mmHg.
PRODUCT STANDARDS
- DIN-8074/75
- ISO-4427/37
- PS-3580
TESTING STANDARDS:
Density test ISO-1183
Heat Reversion Test ISO 4427-2:1997 (E) Ref: ISO-2505
Hydrostatic Pressure Test ISO-4427-2:2007/4437 (E) ISO- 1167
Melt Flow Index Test ISO – 1133
SDR
“Standard Dimension Ratio” – SDR The ratio of pipe diameter to wall thickness (SDR = D/s) D- pipe outside diameter (mm, in) s pipe wall thickness (mm, in) SDR 26 (Diameter Dis 26 times the wall thickness