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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