COMMERCIAL - SERIES 32 SPECIFICATIONS
Steam Boiler Piping, Four, Five, or Six Supply Connections, Gravity Return

Minimum Pipe Sizes

1615*

1710*

1805*

1900*

1995*

2090*

2185**

2280**

2375**

2470**

2565**

2660***

2755***

2850***

3"

3"

3"

3"

3"

3"

3"

3"

3"

3"

3"

3"

3"

3"

A

4"

4"

4"

4"

4"

4"

4"

4"

4"

4"

4"

4"

4"

4"

B

6"

6"

6"

6"

6"

6"

6"

6"

6"

6"

6"

6"

6"

6"

C

-

-

-

-

-

-

8"

8"

8"

8"

8"

8"

8"

8"

D

-

-

-

-

-

-

-

-

-

-

-

-

8"

8"

E

6"

6"

6"

6"

6"

6"

8"

8"

8"

8"

8"

8"

8"

8"

F

2-1/2"

2-1/2"

3"

3"

3"

3"

3"

3"

3"

3"

4"

4"

4"

4"

G

2"

2"

2-1/2"

2-1/2"

2-1/2"

2-1/2"

2-1/2"

2-1/2"

2-1/2"

2-1/2"

3"

3"

3"

3"

H

NOTE: FOR BOILER MODELS 1615 THROUGH 2850 IT IS PERMISSIBLE
TO FABRICATE THE ENTIRE LENGTH OF THE STEAM HEADER USING
THE LARGEST PIPE DIAMETER AS INDICATED IN C, D, OR E FOR A GIVEN SIZE BOILER IN THIS RANGE.
^*FOUR SUPPLY RISERS REQUIRED   ^**FIVE SUPPLY RISERS REQUIRED   ^***SIX SUPPLY RISERS REQUIRED