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Table E-3: PEX pipe expansion arm calculations ½" to 3"
Table E-3: PEX pipe expansion arm calculations ½" to 3"
2" PEX pipe expansion arm
Delta
T (ΔT)
Run
(ft)
Delta
L (in)
Flexible arm
length (in)
L1
(in)
L2
(in)
PEX has a free-body thermal expansion rate of 1.1"/10°F ΔT/100 ft. (27.94mm/5.56°C ΔT/30.48m).
130
50 7.15 46.77 9.35 18.71
60 8.58 51.24 10.25 20.50
70 10.01 55.34 11.07 22.14
80 11.44 59.17 11.83 23.67
90 12.87 62.76 12.55 25.10
100 14.3 66.15 13.23 26.46
140
50 7.7 48.54 9.71 19.42
60 9.24 53.17 10.63 21.27
70 10.78 57.43 11.49 22.97
80 12.32 61.40 12.28 24.56
90 13.86 65.12 13.02 26.05
100 15.4 68.65 13.73 27.46
150
50 8.25 50.24 10.05 20.10
60 9.9 55.04 11.01 22.02
70 11.55 59.45 11.89 23.78
80 13.2 63.55 12.71 25.42
90 14.85 67.41 13.48 26.96
100 16.5 71.06 14.21 28.42
160
50 8.8 51.89 10.38 20.76
60 10.56 56.85 11.37 22.74
70 12.32 61.40 12.28 24.56
80 14.08 65.64 13.13 26.26
90 15.84 69.62 13.92 27.85
100 17.6 73.39 14.68 29.35
2½" PEX pipe expansion arm
Delta
T (ΔT)
Run
(ft)
Delta L
(in)
Flexible arm
length (in)
L1
(in)
L2
(in)
10
50 0.55 14.42 2.88 5.77
60 0.66 15.79 3.16 6.32
70 0.77 17.06 3.41 6.82
80 0.88 18.24 3.65 7.30
90 0.99 19.34 3.87 7.74
100 1.1 20.39 4.08 8.16
20
50 1.1 20.39 4.08 8.16
60 1.32 22.34 4.47 8.93
70 1.54 24.13 4.83 9.65
80 1.76 25.79 5.16 10.32
90 1.98 27.36 5.47 10.94
100 2.2 28.84 5.77 11.53
2½" PEX pipe expansion arm
Delta
T (ΔT)
Run
(ft)
Delta L
(in)
Flexible arm
length (in)
L1
(in)
L2
(in)
PEX has a free-body thermal expansion rate of 1.1"/10°F ΔT/100 ft. (27.94mm/5.56°C ΔT/30.48m).
30
50 1.65 24.97 4.99 9.99
60 1.98 27.36 5.47 10.94
70 2.31 29.55 5.91 11.82
80 2.64 31.59 6.32 12.64
90 2.97 33.51 6.70 13.40
100 3.3 35.32 7.06 14.13
40
50 2.2 28.84 5.77 11.53
60 2.64 31.59 6.32 12.64
70 3.08 34.12 6.82 13.65
80 3.52 36.48 7.30 14.59
90 3.96 38.69 7.74 15.48
100 4.4 40.78 8.16 16.31
50
50 2.75 32.24 6.45 12.90
60 3.3 35.32 7.06 14.13
70 3.85 38.15 7.63 15.26
80 4.4 40.78 8.16 16.31
90 4.95 43.26 8.65 17.30
100 5.5 45.60 9.12 18.24
60
50 3.3 35.32 7.06 14.13
60 3.96 38.69 7.74 15.48
70 4.62 41.79 8.36 16.72
80 5.28 44.67 8.93 17.87
90 5.94 47.38 9.48 18.95
100 6.6 49.95 9.99 19.98
70
50 3.85 38.15 7.63 15.26
60 4.62 41.79 8.36 16.72
70 5.39 45.14 9.03 18.06
80 6.16 48.25 9.65 19.30
90 6.93 51.18 10.24 20.47
100 7.7 53.95 10.79 21.58
80
50 4.4 40.78 8.16 16.31
60 5.28 44.67 8.93 17.87
70 6.16 48.25 9.65 19.30
80 7.04 51.59 10.32 20.63
90 7.92 54.72 10.94 21.89
100 8.8 57.67 11.53 23.07
90
50 4.95 43.26 8.65 17.30
60 5.94 47.38 9.48 18.95
70 6.93 51.18 10.24 20.47
80 7.92 54.72 10.94 21.89
90 8.91 58.03 11.61 23.21
100 9.9 61.17 12.23 24.47