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SDR Pipe Reference

Select Mechanical or Inflatable Pipe Plugs based on the below pipe ID and along with the pressure to be blocked

(PETERSEN DOES NOT SELL PIPE)

"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 - D - is 26 times the wall thickness - s )

Thus rated pressure is higher for low SDR ratios and lowwer for higher SDR ratios

SDR

 

These dimentions are for reference only so please verify and let us know of any errors.

Nominal Pipe Size Average Outside Diameter Minimum Wall Thickness (in) And Calculated ID (in)
(in) (in) SDR 64 SDR 41 SDR 32.5 SDR 26 SDR 21 SDR 17 SDR 13.5
Wall ID Wall ID Wall ID Wall ID Wall ID Wall ID Wall ID
1/8 0.405 0.06 0.35
1/4 0.54 0.06 0.46
3/8 0.675 0.06 0.58
1/2 0.84 0.062 0.72
3/4 1.05 0.06 0.95 0.062 0.93 0.078 0.89
1 1.315 0.06 1.21 0.063 1.19 0.077 1.16 0.097
1 1/4 1.66 0.06 1.56 0.064 1.53 0.079 1.50 0.098 1.46 0.123
1 1/2 1.9 0.06 1.78 0.073 1.75 0.09 1.72 0.112 1.68 0.141 1.62
2 2.375 0.073 2.23 0.091 2.19 0.113 2.15 0.14 2.10 0.176 2.02
2 1/2 2.875 0.088 2.70 0.11 2.65 0.137 2.60 0.169 2.54 0.213 2.45
3 3.5 0.085 3.33 0.108 3.28 0.135 3.23 0.167 3.17 0.206 3.09 0.259 2.98
3 1/2 4 0.098 3.80 0.123 3.75 0.154 3.69 0.19 3.62 0.235 3.53 0.296 3.41
4 4.5 0.07 4.36 0.11 4.28 0.138 4.22 0.173 4.15 0.214 4.07 0.265 3.97 0.333 3.83
5 5.563 0.087 5.39 0.136 5.29 0.171 5.22 0.214 5.14 0.265 5.03 0.327 4.91 0.412 4.74
6 6.625 0.104 6.42 0.162 6.30 0.204 6.22 0.255 6.12 0.316 5.99 0.39 5.85 0.491 5.64
8 8.625 0.135 8.36 0.21 8.20 0.265 8.09 0.332 7.96 0.41 7.80 0.508 7.61
10 10.75 0.168 10.41 0.262 10.23 0.331 10.09 0.413 9.92 0.511 9.73 0.632 9.49
12 12.75 0.199 12.35 0.311 12.13 0.392 11.97 0.49 11.77 0.606 11.54 0.75 11.25
14 14 13.56 0.341 13.32 0.43 13.14 0.538 12.92 0.666 12.67 0.823 12.35
16 16 15.50 0.39 15.22 0.492 15.02 0.615 14.77 0.762 14.48 0.941 14.12
18 18 17.44 0.439 17.12 0.554 16.89 0.692 16.62 0.857 16.29 1.059 15.88
20 20 19.38 0.488 19.02 0.615 18.77 0.769 18.46 0.952 18.10 1.176 17.65
24 24 23.25 0.585 22.83 0.738 22.52 0.923 22.15 1.143 21.71 1.412 21.18
30 30 29.06 0.732 28.54 0.923 28.15 1.154 27.69 1.428 27.14 1.765 26.47
36 36 34.88 0.878 34.24 1.108 33.78 1.385 33.23 1.714 32.57 2.118 31.76