Poly Pipe - Blue Stripe PN12.5

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Metric "Blue-Stripe" HDPE polyethylene pipe is manufactured to operate at specific maximum operating pressures and these are generally known as "PN" or the new "SDR".   In PE100 HDPE, the PN 6.3 metric pipe is also known as SDR 26 and the maximum operating pressure of theat pipe with water at 20 degrees C is 630 kPa.   Note that this is the maximum safe maximum working pressure and allowance must be made for pressure bounce that will occur when pumps start and stop and valves open and close.

Maximum Operating Pressures PE100 PN & SDR (Standard Dimension Ratio)









PN6.3

PN 8

PN 10

PN 12.5

PN16.0

PN 20


SDR 26

SDR 21

SDR 17

SDR 13.6

SDR 11

SDR 9








Bar

6.3

8

10

12.5

16

20








kPa

630

800

1,000

1,250

1,600

2,000








M of Head

63

80

100

125

160

200








psi

90

114

142

178

228

285








Maximum operating pressures are with water at 20 degrees C