Pipe Schedules

Size Pipe

         O.D. in Inches

   5

10

40

STD.

80.

E.H.

160

DBLE. E.H.

1/8

.405

12,963

48,000

25,185

25,185

35,185

35,186

.035/.1383

.049/.1863

.068/.2447

.068/.2447

.095/.3145

.095/.3145

1/4

.540

13,611

18,056

24,444

24,444

33,056

33,056

.049/.3270

.065/.3297

.086/.4248

.088/.4248

.119/.5351

.119/5351

3/8

.675

10,889

14,444

20,222

20,222

28,000

28,000

.049/.3276

.065/.4235

.091/.5676

.091/.5676

.126/.7388

.126/.7388

1/2

.840

11,607

14,821

19,464

19,464

26,250

26,250

33,383

52,500

.065/.5380

.083/.6710

.109/.8510

.109/.8510

.147/1.088

.147/1.088

.187/1.304

.294/1.714

3/4

1.050

9,286

11,857

16,143

16,143

22,000

22,000

31,143

44,000

.065/.6838

.083/.8572

.113/1.131

.113/1.131

.154/1.474

.154/1.474

.218/1.937

.308/2.441

1

1.315

7,414

12,433

15,171

15,171

20,418

20,418

28,517

40,837

.065/.8678

.109/1.404

.133/1.679

.133/1.679

.179/2.172

.179/2.172

.250/2.844

.358/3.659

1 1/4

1.660

5,873

9,849

12,651

12,651

17,259

17.259

22,590

34,518

.065/1.107

.109/1.806

.140/2.273

.140/2.273

.191/2.997

.191/2.997

.250/3.765

.382/5.214

1 1/2

1.900

5,132

8,505

11,447

11,447

15,789

15,789

22,184

31,579

.065/1.274

.109/2.085

.145/2.718

.145/2.718

.200/3.631

.200/3.631

.281/4.859

.400/6.408

2

2.375

4,105

6,884

9,726

9,726

13,768

13,768

21,663

27,537

.065/1.604

.109/2.638

.154/3.653

.154/3.653

.218/5.022

.218/5.022

.343/7.444

.436/9.029

2 1/2

2.875

4,330

6,261

10,591

10,591

14,400

14.400

19,565

28,800

.083/2.475

.120/3.531

.203/5.793

.203/5.793

.276/7.661

.276/7.661

.375/10.01

.552/13.69

3

3.5

3,557

5,143

9,257

9,257

12,857

12,857

18,771

25,714

.083/3.029

.120/4.332

.216/7.576

.216/7.576

.300/10.25

.300/10.25

.438/14.32

.600/18.58

3 1/2

4.0

3,112

4,500

8,475

8.475

11,925

11,925

23,850

.083/3.472

.120/4.973

.226/9.109

.226/9.109

.318/12.50

.318/12.50

.636/22.85

4

4.5

2,767

4,000

7,900

7,900

11,233

11,233

17,700

22,467

.083/3.915

.120/5.613

.237/10.79

.237/10.79

.337/14.98

.337/14.98

.531/22.51

.674/27.54

5

5.563

2,939

3,613

6,957

6,957

10,111

10,111

16,852

20,223

.109/6.349

.134/7.770

.258/14.62

.258/14.62

.375/20.78

.375/20.78

.625/32.96

.75/38.55

6

6.625

2,468

3,034

6,340

6,340

9,781

9,781

16,257

19,562

.109/7.585

.134/9.289

.280/18.97

.280/18.97

.432/28.57

.432/28.57

718/45.30

.864/53.16

8

8.625

1,896

2,574

5,600

5,600

8,696

8,696

15,756

15,217

.1099.914

.148/13.40

.322/28.55

.322/28.55

.500/43.39

.500/43.39

.906/74.69

.875/72.42

10

10.75

1,870

2,302

5,093

5,093

8,274

6,977

Working pressures for

.134/15.19

.165/18.70

.365/40.48

.365/40.48

.593/64.33

.500/54.74

1,941

2,118

4,776

4,412

8,082

5,882

T304/L and T316/L A312 pipe

12

12.75

between -20°F and 100°F.

.156/20.93

.180/24.16

.406/53.52

.375/49.56

.687/88.51

.500/65.42

14

14.0

2,679

4,693

4,018

8,036

5,357

The A.S.M.E. code suggests

.250/36.71

.438/63.37

.375/54.57

.750/106.1

.500/72.09

a safety factor of four.

2,344

4,688

3,516

7,903

4,688

E.G. 1” SCH40 = 3793 P.S.I.

16

16.0

.250/42.05

.500/82.77

.375/62.58

.843/136.5

.500/82.77

For higher temperatures

18

18.0

2,083

4,683

3,125

7,808

4,167

multiply working pressure

.250/47.39

.562/104.8

.375/70.59

.937/170.8

500/93.45

by:

20

20.0

1,875

4,448

2,812

7,733

3,750

300°F

500°F 1000°F

.250/52.73

.593/122.9

.375/78.60

1.031/208.9

500/104.1

T304/L

.828

.744

.665

24

24.0

1,563

4,294

2,344

7,613

3,125

T316/L

.900

.853

.746

.250/63.41

.687/171.2

.375/94.62

1.218/296.4

.500/125.5

1,748

2,453

1.108

1.544