The following table shows the standard dimensions of iron pipe, including standard threads for ends of the pipe. These standard sizes are made in wrought iron, mild steel, and brass as commercial products.

In ordering iron pipe it is necessary to designate only the size of pipe required as given in the first column of the table, without any mention of thickness.

Size Inches.

Actual

Outside

Diameter

Inches.

Thickness Inches.

Threads per Inch.

Size Inches.

Actual Outside Diameter Inches.

Thickness Inches.

Threads per Inch.

1/8

.405

.068

27

3 1/2

4.0

.226

8

1/4

.54

.088

18

4

4.5

.237

8

3/8

.675

.091

18

4 1/2

5.0

.246

8

1/2

.84

.109

14

5

5.563

.259

8

3/4

1.05

.113

14

6

6.625

.280

8

1

1.815

.134

11 1/2

7

7.625

.301

8

1 1/4

1.66

.140

11 1/2

8

8.625

.322

8

1 1/2

1.9

.145

11 1/2

9

9.625

.344

8

2

2.375

.154

11 1/2

10

10.75

.366

8

2 1/2

2.875

.204

8

11

11.75

.375

8

3

3.5

.217

8

12

12.75

.375

8