CONTROL VALVE HANDBOOK Episode 2 Part 5 pps

Engineering DataFlow of Air Through Schedule 40 Steel Pipe continued FREE AIR INCH PER 100 FEET OF SCHEDULE 40 PIPE FOR AIR AT 100 POUNDS PER SQUARE INCH GAUGE PRESSURE AND 60_F TEMPERAT

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Chapter 10 Engineering Data

227

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Flow of Water Through Schedule 40 Steel Pipe DISCHARGE PRESSURE DROP PER 100 FEET AND VELOCITY IN SCHEDULE 40 PIPE FOR WATER AT 60_F

Velocity (Feet per Sec.)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press Drop (PSI)

Gallons

per

Minute

Cubic Ft.

per

Second

3/4”

1”

1−1/4”

1−1/2”

2”

5 0.01114

2−1/2”

3”

3−1/2”

4”

(continued)

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Flow of Water Through Schedule 40 Steel Pipe (continued) DISCHARGE PRESSURE DROP PER 100 FEET AND VELOCITY IN SCHEDULE 40 PIPE FOR WATER AT 60_F

DISCHARGE

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Gallons

per

Minute

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Cubic Ft.

per

Second

5”

6”

8”

350 0.7798

10”

(continued)

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DISCHARGE

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Gallons

per

Minute

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Cubic Ft.

per

Second

12”

14”

16”

18”

20”

24”

(continued)

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DISCHARGE

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Gallons

per

Minute

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Press.

Drop (PSI)

Cubic Ft.

per

Second

For pipe lengths other than 100 feet, the pressure drop is proportional to the length Thus, for 50 feet of pipe, the pressure drop is approximately one−half the value given in the table—for 300 feet, three times the given value, etc

Velocity is a function of the cross sectional flow area; thus it is constant for a given flow rate and is independent of pipe length

For calculations for pipe other than Schedule 40, see explanation later in this chapter.

Extracted from Technical Paper No 410, Flow of Fluids, with permission of Crane Co.

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Flow of Air Through Schedule 40 Steel Pipe FREE AIR

q’m

COMPRESSED

INCH PER 100 FEET OF SCHEDULE 40 PIPE FOR AIR AT 100 POUNDS PER SQUARE INCH GAUGE PRESSURE AND 60_F TEMPERATURE

Cubic Feet Per

Minute at 60_F and

14.7 psia

Cubic Feet Per Minute at 60_F and

100 psig

1/2”

3/4”

1”

1−1/4”

1−1/2”

2”

2−1/2”

(continued)

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Flow of Air Through Schedule 40 Steel Pipe (continued) FREE AIR

COMPRESSED AIR Cubic Feet Per

14.7 psia

PRESSURE DROP OF AIR IN POUNDS PER SQUARE INCH PER 100 FEET OF SCHEDULE 40 PIPE FOR AIR AT 100 POUNDS PER SQUARE INCH GAUGE PRESSURE AND 60_F TEMPERATURE

100 psig

3”

3−1/2”

4”

5”

(continued)

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14.7 psia

100 psig

6”

8”

10”

11.8

12”

(continued)

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14.7 psia

100 psig

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236

For lengths of pipe other than 100 feet, the pressure drop is proportional to the length Thus, for 50 feet of pipe, the pressure drop is approximately one−half the value given in the table—for 300 feet, three times the given value, etc.

The pressure drop is also inversely proportional to the absolute pressure and directly proportional to the absolute temperature.

Therefore, to determine the pressure drop for inlet or average pressures other than 100 psi and at temperatures other than 60 _ F, multiply the values given in the table by the ratio:

ǒ 100 ) 14.7

where:

P is the inlet or average gauge pressure in pounds per square inch, and,

t is the temperature in degrees Fahrenheit under consideration.

The cubic feet per minute of compressed air at any pressure is inversely propor-tional to the absolute pressure and directly proporpropor-tional to the absolute tempera-ture.

To determine the cubic feet per minute of compressed air at any temperature and pressure other than standard conditions, multiply the value of cubic feet per min-ute of free air by the ratio:

ǒ 14.7

Calculations for Pipe Other than Schedule 40

To determine the velocity of water, or the pressure drop of water or air, through pipe other than Schedule 40, use to following formulas:

D Pa+ D P40ǒ d40

Subscript a refers to the Schedule of pipe through which velocity or pressure

drop is desired.

Subscript 40 refers to the velocity or pressure drop through Schedule 40 pipe, as given in the tables earlier in this chapter titled Flow of Water Through Schedule

40 Steel Pipe.

Extracted from Technical Paper No 410, Flow of

Fluids, with permission of Crane Co.

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Chapter 11

Pipe Data

Pipe Engagement Length of Thread on Pipe to Make a Tight Joint

Nominal Pipe Size (Inches)

Dimension A (Inches)

Nominal Pipe Size (Inches)

Dimension A (Inches)

Dimension A is the sum of L1 (handtight engagement) and L3 (wrench makeup length for internal thread) from ASME B1.20.1−1992

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Chapter 11 Pipe Data

Pipe Data Carbon and Alloy Steel − Stainless Steel Identification, wall thickness and weights are extracted from ASME B36.10M and B36.19M The notations STD, XS and XXS indicate

Standard, Extra Strong, and Double Extra Strong pipe, respectively.

Transverse internal area values listed in “sq.ft” also represent volume in cubic feet per foot of pipe length.

NOMINAL

PIPE

SIZE

(INCHES)

OUTSIDE DIAMETER (Inches)

IDENTIFICATION

WALL THICKNESS (t) (INCHES)

INSIDE DIAMETER (d) (INCHES)

AREA OF METAL (SQUARE INCHES)

TRANSVERSE INTERNAL AREA WEIGHT

PIPE (LB/FT)

WATER WEIGHT (LB/FT PIPE)

Steel Stainless

Steel Sched.

No.

Iron Pipe Size

Sched.

No.

(a) (Square Inches)

(A) (Square Feet)

1/8 0.405

– – – – – – STD XS

– – – 30 40 80

10S – – – 40S 80S

0.049 0.057 0.068 0.095

0.307 0.291 0.269 0.215

0.0548 0.0623 0.0720 0.0925

0.0740 0.0665 0.0568 0.0363

0.00051 0.00046 0.00039 0.00025

0.19 0.21 0.24 0.31

0.032 0.029 0.025 0.016

1/4 0.540

– – – – – – STD XS

– – – 30 40 80

10S – – – 40S 80S

0.065 0.073 0.088 0.119

0.410 0.394 0.364 0.302

0.0970 0.1071 0.1250 0.1574

0.1320 0.1219 0.1041 0.0716

0.00092 0.00085 0.00072 0.00050

0.33 0.36 0.42 0.54

0.057 0.053 0.045 0.031

3/8 0.675

– – – – – – STD XS

– – – 30 40 80

10S – – – 40S 80S

0.065 0.073 0.091 0.126

0.545 0.529 0.493 0.423

0.1246 0.1381 0.1670 0.2173

0.2333 0.2198 0.1909 0.1405

0.00162 0.00153 0.00133 0.00098

0.42 0.47 0.57 0.74

0.101 0.095 0.083 0.061

1/2 0.840

– – – – – – – – – STD XS – – – XXS

– – – – – – 30 40 80 160 – – –

5S 10S – – – 40S 80S – – – – – –

0.065 0.083 0.095 0.109 0.147 0.188 0.294

0.710 0.674 0.650 0.622 0.546 0.464 0.252

0.1583 0.1974 0.2223 0.2503 0.3200 0.3851 0.5043

0.3959 0.3568 0.3318 0.3039 0.2341 0.1691 0.0499

0.00275 0.00248 0.00230 0.00211 0.00163 0.00117 0.00035

0.54 0.67 0.76 0.85 1.09 1.31 1.71

0.172 0.155 0.144 0.132 0.101 0.073 0.022 (continued)

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Pipe Data (continued) Carbon and Alloy Steel − Stainless Steel Identification, wall thickness and weights are extracted from ASME B36.10M and B36.19M The notations STD, XS and XXS indicate

NOMINAL

PIPE

SIZE

(INCHES)

WEIGHT PIPE (LB/FT)

TRANSVERSE INTERNAL AREA AREA

OF METAL (SQUARE INCHES)

IDENTIFICATION OUTSIDE

DIAMETER (Inches)

NOMINAL

PIPE

SIZE

(INCHES)

Stainless Steel Sched.

No.

Steel OUTSIDE

NOMINAL

PIPE

SIZE

(INCHES)

WEIGHT PIPE (LB/FT) (A)

(Square Feet)

No.

Sched.

No.

Iron Pipe Size

3/4 1.050

– – – – – – – – – STD XS – – – XXS

– – – – – – 30 40 80 160 – – –

5S 10S – – – 40S 80S – – – – – –

0.065 0.083 0.095 0.113 0.154 0.219 0.308

0.920 0.884 0.860 0.824 0.742 0.612 0.434

0.2011 0.2521 0.2850 0.3326 0.4335 0.5717 0.7180

0.6648 0.6138 0.5809 0.5333 0.4324 0.2942 0.1479

0.00462 0.00426 0.00403 0.00370 0.00300 0.00204 0.00103

0.69 0.86 0.97 1.13 1.47 1.94 2.44

0.288 0.266 0.252 0.231 0.187 0.127 0.064

– – – – – – – – – STD XS – – – XXS

– – – – – – 30 40 80 160 – – –

5S 10S – – – 40S 80S – – – – – –

0.065 0.109 0.114 0.133 0.179 0.250 0.358

1.185 1.097 1.087 1.049 0.957 0.815 0.599

0.2553 0.4130 0.4301 0.4939 0.6388 0.8365 1.0763

1.103 0.9452 0.9280 0.8643 0.7193 0.5217 0.2818

0.00766 0.00656 0.00644 0.00600 0.00500 0.00362 0.00196

0.87 1.40 1.46 1.68 2.17 2.84 3.66

0.478 0.410 0.402 0.375 0.312 0.226 0.122

1−1/4 1.660

– – – – – – – – – STD XS – – – XXS

– – – – – – 30 40 80 160 – – –

5S 10S – – – 40S 80S – – – – – –

0.065 0.109 0.117 0.140 0.191 0.250 0.382

1.530 1.442 1.426 1.380 1.278 1.160 0.896

0.3257 0.5311 0.5672 0.6685 0.8815 1.1070 1.5340

1.839 1.633 1.597 1.496 1.283 1.057 0.6305

0.01277 0.01134 0.01109 0.01039 0.00891 0.00734 0.00438

1.11 1.81 1.93 2.27 3.00 3.76 5.21

0.797 0.708 0.692 0.648 0.556 0.458 0.273 (continued)

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NOMINAL

PIPE

SIZE

(INCHES)

NOMINAL

PIPE

SIZE

(INCHES)

No.

Steel OUTSIDE

NOMINAL

PIPE

SIZE

(INCHES)

(Square Feet)

No.

Sched.

No.

Iron Pipe Size

1−1/2 1.900

– – – – – – – – – STD XS – – – XXS

– – – – – – 30 40 80 160 – – –

5S 10S – – – 40S 80S – – – – – –

0.065 0.109 0.125 0.145 0.200 0.281 0.400

1.770 1.682 1.650 1.610 1.500 1.338 1.100

0.3747 0.6133 0.6970 0.7995 1.068 1.429 1.885

2.461 2.222 2.138 2.036 1.767 1.406 0.9503

0.01709 0.01543 0.01485 0.01414 0.01227 0.00976 0.00660

1.28 2.09 2.37 2.72 3.63 4.86 6.41

1.066 0.963 0.927 0.882 0.766 0.609 0.412

– – – – – – – – – STD XS – – – XXS

– – – – – – 30 40 80 160 – – –

5S 10S – – – 40S 80S – – – – – –

0.065 0.109 0.125 0.154 0.218 0.344 0.436

2.245 2.157 2.125 2.067 1.939 1.687 1.503

0.4717 0.7760 0.8836 1.075 1.477 2.195 2.656

3.958 3.654 3.547 3.356 2.953 2.235 1.774

0.02749 0.02538 0.02463 0.02330 0.02051 0.01552 0.01232

1.61 2.64 3.00 3.65 5.02 7.46 9.03

1.715 1.583 1.537 1.454 1.280 0.969 0.769

2−1/2 2.875

– – – – – – – – – STD XS – – – XXS

– – – – – – 30 40 80 160 – – –

5S 10S – – – 40S 80S – – – – – –

0.083 0.120 0.188 0.203 0.276 0.375 0.552

2.709 2.635 2.499 2.469 2.323 2.125 1.771

0.7280 1.039 1.587 1.704 2.254 2.945 4.028

5.764 5.453 4.905 4.788 4.238 3.547 2.463

0.04003 0.03787 0.03406 0.03325 0.02943 0.02463 0.01711

2.48 3.53 5.40 5.79 7.66 10.01 13.69

2.498 2.363 2.125 2.075 1.837 1.537 1.067 (continued)

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NOMINAL

PIPE

SIZE

(INCHES)

NOMINAL

PIPE

SIZE

(INCHES)

No.

Steel OUTSIDE

NOMINAL

PIPE

SIZE

(INCHES)

(Square Feet)

No.

Sched.

No.

Iron Pipe Size

– – – – – – 30 STD XS – – – XXS

– – – – – – – – – 40 80 160 – – –

5S 10S – – – 40S 80S – – – – – –

0.083 0.120 0.188 0.216 0.300 0.438 0.600

3.334 3.260 3.124 3.068 2.900 2.624 2.300

0.8910 1.274 1.956 2.228 3.016 4.213 5.466

8.730 8.347 7.665 7.393 6.605 5.408 4.155

0.06063 0.05796 0.05323 0.05134 0.04587 0.03755 0.02885

3.03 4.33 6.65 7.58 10.25 14.32 18.58

3.783 3.617 3.322 3.203 2.862 2.343 1.800

3−1/2 4.000

– – – – – – 30 STD XS

– – – – – – – – – 40 80

5S 10S – – – 40S 80S

0.083 0.120 0.188 0.226 0.318

3.834 3.760 3.624 3.548 3.364

1.021 1.463 2.251 2.680 3.678

11.55 11.10 10.31 9.887 8.888

0.08017 0.07711 0.07163 0.06866 0.06172

3.48 4.97 7.65 9.11 12.50

5.003 4.812 4.470 4.284 3.851

– – – – – – – – – STD XS – – – – – – XXS

– – – – – – 30 40 80 120 160 – – –

5S 10S – – – 40S 80S – – – – – – – – –

0.083 0.120 0.188 0.237 0.337 0.438 0.531 0.674

4.334 4.260 4.124 4.026 3.826 3.624 3.438 3.152

1.152 1.651 2.547 3.174 4.407 5.589 6.621 8.101

14.75 14.25 13.36 12.73 11.50 10.31 9.283 7.803

0.10245 0.09898 0.09276 0.08840 0.07984 0.07163 0.06447 0.05419

3.92 5.61 8.66 10.79 14.98 19.00 22.51 27.54

6.393 6.176 5.788 5.516 4.982 4.470 4.023 3.381 (continued)

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