22
STEAM BOILER PIPING Figure 35
Full size steam header is recommended on all steam
systems as shown above. On Boiler Models 300, 400 and
500 full header may be eliminated and single steam header
taken off either side of boiler provided system is clean and
properly designed.
Risers should be full 4” and at least 20” in height. Use
skimmer tee as shown.
Area of Main Steam Cross Header Pipe should be equal to
or larger than total area of Steam Supply Mains leading
from Header and should never be smaller than Supply
tappings on Boiler. Return Header should be piped to both
ends of Boiler. Area of Return Header should be equal to
total area of Return Mains or larger.
Steam cross headers must be piped with swing joints, or
be equipped with slip joint connector, in order to prevent
expansion and contraction of steam header from damaging
boiler.
Each installation has preferred piping arrangement
according to requirements of particular system and choice
of arrangements and sizes of Headers should be decided
upon by installer’s heating engineer or with standard
engineering practice.
STEAM BOILER PIPING
SAFETY VALVE SHOULD BE FIELD INSTALLED AS CLOSE AS POSSIBLE TO BOILER
Steam Piping Size
Model
Header
Riser
Equalizer
300 to 900
4”
4”
2”
1000 to 1900
4”
4”
2 ½”
2000 to 2500
4”
4”
3”
2600 to 3000
4”
4”
4”
BOILER PIPING
Figure 35
WARNING
Do not install shut-off or steam valve between
safety valve and boiler.
!
