Sizes Of Steam Pipes

Radiating

Surface.

Sq. Ft.

1-Pipe

Work.

In.

2-Pipe Work.

Steam In.

Ret. In.

40- 50

1

3/4

3/4

100- 126

1 1/4

1

3/4

126- 250

1 1/2

1 1/4

1

250- 400

2

1 1/2

1 1/4

400- 600

2 1/2

2

1 1/2

600- 900

3

2 1/2

2

900-1,200

3 1/2

3

2 1/2

1,200-1,600

4

3 1/2

3

Radiating

Surface.

Sq. Ft.

1-Pipe

Work.

In.

2-Pipe Work.

Steam In.

In.

1,600- 2,000

4 1/2

4

3 1/2

2,000- 2,500

5

4 1/2

1

2,500- 3,600

6

5

4 1/2

3,600- 5,000

7

6

5

5,000- 6,500

8

7

6

6,500- 8,000

9

8

6

8,000-10,000

10

0

6

If the mains are high above the boiler, and have short. straight runs, small pipes may be used. If they are unusually low or extremely long or crooked, they should be large. The above table will give good results in ordinary systems.

To determine approximately the size of steam mains or principal risers, allow 1 sq. in. of sectional area of pipe for each 100 sq. ft. of radiating surface.

To determine the amount of radiating surface a pipe will supply, allow 100 sq. ft. for each square inch of sectional of pipe.

Sizes Of Tappings For Prime Surface Radiators

Direct Radiators.

Indirect Radiators.

1-Pipe Work.

2-Pipe Work.

Surface. Sq. Ft.

Size. In.

Surface. Sq. Ft.

Steam. In.

Return. In.

Surf. Sq. Ft.

Steam. In.

Ret. In.

25

1

30

3/4

3/4

30

1

3/4

25-50

1 1/4

30-50

1

3/4

30- 50

li

1

50-90

1 1/2

50-100

1 1/4

1

50-100

1 1/2

1 1/4

100-160

2

100-160

l 1/2

1 1/4

100-160

2

1 1/2