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Flanged Open-Flow
Elbows

Bore Chart (I.D. of Pipe)

Pipe

Size

O.D.

Sched

5

Sched

10

Sched

20

Sched

30

Sched

40

Sched

60

Sched

80

Sched

100

Sched

120

Sched

140

Sched

160

Std.

*

†

XS

XXS

1/8”

0.405

0.000

0.307

0.000

0.000

0.269

0.000

0.215

0.000

0.000

0.000

0.157

0.269

0.215

0.025

Ό”

0.540

0.000

0.410

0.000

0.000

0.364

0.000

0.302

0.000

0.000

0.000

0.250

0.364

0.302

0.064

3/8”

0.675

0.000

0.545

0.000

0.000

0.493

0.000

0.423

0.000

0.000

0.000

0.359

0.493

0.423

0.171

½”

0.840

0.710

0.674

0.000

0.000

0.622

0.000

0.546

0.000

0.000

0.000

0.464

0.622

0.546

0.252

Ύ”

1.050

0.920

0.884

0.000

0.860

0.824

0.000

0.742

0.000

0.000

0.000

0.612

0.824

0.742

0.434

1.315

1.185

1.097

0.000

1.087

1.049

0.000

0.957

0.000

0.000

0.000

0.815

1.049

0.957

0.599

1 Ό”

1.660

1.530

1.442

0.000

1.426

1.380

0.000

1.278

0.000

0.000

0.000

1.160

1.380

1.278

0.896

1 ½”

1.900

1.770

1.682

0.000

1.650

1.610

0.000

1.500

0.000

0.000

0.000

1.338

1.610

1.500

1.100

2.375

2.245

2.157

0.000

2.125

2.067

0.000

1.939

0.000

0.000

0.000

1.687

2.067

1.939

1.503

2 ½”

2.875

2.709

2.635

0.000

2.499

2.469

0.000

2.323

0.000

0.000

0.000

2.125

2.469

2.323

1.771

3.500

3.334

3.260

0.000

3.124

3.068

0.000

2.900

0.000

0.000

0.000

2.624

3.068

2.900

2.300

3 ½”

4.000

3.834

3.760

0.000

3.624

3.548

0.000

3.364

0.000

0.000

0.000

0.000

3.548

3.364

2.728

4.500

4.334

4.260

0.000

4.126

4.026

0.000

3.826

0.000

3.624

0.000

3.438

4.026

3.826

3.152

5.563

5.345

5.295

0.000

0.000

5.047

0.000

4.813

0.000

4.563

0.000

4.313

5.047

4.813

4.063

6.625

6.407

6.357

0.000

0.000

6.065

0.000

5.761

0.000

5.501

0.000

5.187

6.065

5.761

4.897

8.625

8.407

8.329

8.125

8.071

7.981

7.813

7.625

7.437

7.187

7.001

6.813

7.981

7.625

6.875

10”

10.750

10.482

10.420

10.250

10.136

10.020

9.750

9.562

9.312

9.062

8.750

8.500

10.020

9.750

8.750

12”

10.750

12.438

12.390

12.250

12.090

11.938

11.626

11.374

11.062

10.750

10.500

10.126

12.000

11.750

10.750

14”

14.000

13.688

13.500

13.376

13.250

13.124

12.812

12.500

12.124

11.812

11.500

11.188

13.250

13.000

0.000

16”

16.000

15.670

15.500

15.376

15.250

15.000

14.688

14.312

13.938

13.562

13.124

12.812

15.250

15.000

0.000

18”

18.000

17.670

17.500

17.376

17.124

16.876

16.500

16.124

15.688

15.250

14.876

14.438

17.250

17.000

0.000

20’

20.000

19.624

19.500

19.250

19.000

18.812

18.376

17.938

17.438

17.000

16.500

16.062

19.250

19.000

0.000

24”

24.000

23.564

23.500

23.250

22.876

22.624

22.062

21.562

20.938

20.376

19.876

19.312

23.250

23.000

0.000

30”

30.000

29.500

29.376

29.000

28.750

0.000

0.000

0.000

0.000

0.000

0.000

0.000

29.250

29.000

0.000

Above data was compiled from existing standards and should be used as a guide.

All dimensions are given in inches and are in accordance with ASME B36.10 or ANSI/ASME B36.19 as applicable.

The decimal thickness listed for the pipe sizes represent their nominal or average wall dimensions.

*For nominal sizes through 10”, Standard Weight thickness is identical to Schedule 40 thickness.

†For nominal sizes through 8”, Extra Strong thickness is identical to Schedule 80 thickness.
These do not conform to ANSI/ASME B36.19.