2000 Hook-up Book
Compressed Air Line Pressure Drop
Figure 66: Compressed Air Line Pressure Drop 20 10 5 01412 10 8 7 Gauge Pressure – lb. per sq. inch Abs. Pres. – P.S.I.A. 6 5 400 300 200 100
SYSTEM DESIGN
12 10
10000
6000 4000 3000 2000 1000 600 400 300 200
8
6
5
Cubic Feet – Free Air per Minute
4
3 1 /
2 3
2 1 /
2
2
100
1 1 /
60 40 30 20
2
1 1 /
4
1
4 Nominal Pipe Sizes – Std. weight pipe
3 /
10
1 /
2
.03 .04 .06 .08 .1
.2 Pressure Drop lbs per sq. inch per 100 feet .3 .4 .5 .6 .8 1.0 1.5 2
Pipe Expansion
Figure 67: Expansion Chart for Mild Steam Pipe
Temperature difference (°F) 100 200 300 400500600
700 600 500 400 300 200 150 125 100 75
700 800 900
Table 22: Calculation of Pipe Expansion
Expansion ( ∆ ) = L 0 x ∆ t x a (inches) L 0 = Length of pipe between anchors (ft) ∆ t = Temperature difference (°F) a = Expansion coefficient For Temp. Range 30 32 32 32 32 32 32 32 (°F) to to to to to to to to 32 212 400 600 750 900 1100 1300 Mild Steel 0.1-0.2% C 7•1 7•8 8•3 8•7 9•0 9•5 9•7 — Alloy Steel 1% Cr. 1/2% Mo 7•7 8•0 8•4 8•8 9•2 9•6 9•8 — Stainless Steel 18% Cr. 8% Ni 10•8 11•1 11•5 11•8 12•1 12•4 12•6 12•8 Expansion Coefficient a x 10 -5 (inches) Example 7•1 x 10 -5 = 0.000071
12 16 20 26 32 40
Temperature of Saturated Steam psi gauge Temp (°F) 5 228 10 240 25 267 50 298 75 320 100 338 125 353 150 366 200 388 250 406 300 421 400 448 500 470
50
Length of pipe (feet)
25
16
1/2 3/4 1 1 1 /
2 2 3 4 6 Expansion of pipe (inches) 8
66
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