Monday, September 25, 2017

Pipe

Polyethylene -  PE - is popular and and commonly used material in water pipes. It is usual to use PE-LD (polyethyline Low Density) or PE-HD (polyethylene high density) for these applications

PE pipes are produced in different pressure grades - PN grades - indicating the pressure in bars the pipe can support with water at 20 oC.

The pressure grades available according to European standards are

  • 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 = 10.20 m H2O = 750 mmHg
European standards and available PEH pipes
pvcPIPE
:
Outside Diameter
(mm)
Pressure Rating
PN 2.5 PN 4 PN 6 PN 10 PN 16
Inside Diameter (mm)
20 16 14.4
25 21 20.4 18
32 28 26.2 23.2
40 36 35.4 32.6 29
50 46 44.2 40.8 36.2
63 59.8 58.2 55.8 51.4 45.8
75 71.2 69.2 66.4 61.4 54.4
90 85.6 83 79.8 73.6 65.4
110 104.6 101.6 97.4 90 79.8
125 118.8 115.4 110.8 102.2 90.8
140 133 129.2 124 114.6 101.6
160 152 147.6 141.8 130.8 116.2
180 171.2 166.2 159.6 147.2 130.8
200 190.2 184.6 177.2 163.6 145.4
225 214 207.8 199.2 184 163.4
250 237.6 230.7 221.6 204.6 181.6
280 266.2 258.6 248.2 229.2 203.4
315 299.6 290.8 279.2 257.8 229
355 337.6 327.8 314.8 290.6 258
400 380.4 369.4 354.6 327.4 290.6
450 428 415.6 399 368.2 327
500 475.4 461.8 443.4 409.2
560 532.6 517.2 496.6 458.4
630 599.2 581.8 558.6 515.6
710 675.2 655.6 629.6
800 760.8 738.8 709.4
900 856 831.2 798
1000 951 923.6 887
1200 1141.2 1108.2
1400 1331.4 1293
1600 1521.6 1477.6