INSTALLATION AND OPERATING INSTRUCTIONS
10
4. BOILER PIPING
A. STEAM BOILER PIPING – SINGLE
BOILERS
1. Install steam supply pipes as shown in Figure 4.3. The
minimum quantity and size of supply pipes are
indicated in Table 4.1.
2. Pipe the steam header a minimum of 24" above the
normal water line using swing joints to attach the
risers into the steam header.
3. Use threaded fittings for manifold piping to provide
flexibility for thermal expansion.
4. Connect the equalizing line as shown in Figure 4.3
or 4.4 assuring that the reducing elbow is facing
down and that any bushings are vertical to prevent
water build-up in the steam header.
Figure 4.3: Steam Piping – Single Supply
Connection
Use swing joints to attach to the header to avoid
damage to the boiler due to thermal expansion and
contraction of steam header pipe.
NOTICE
Figure 4.4: Steam Piping – Dual Supply
Connections
• Do not use bushings or concentric reducers in the
horizontal header piping. This will prevent water
from dropping into the equalizer and cause water
carryover into the steam piping.
• Do not reduce the size or number of steam supply
risers below the minimum shown in Table 4.1.
Insufficient or undersized risers can cause damage
to the boiler.
• Do not use a bullhead tee to provide steam supply
to the system. This will cause water carryover into
the steam piping.
NOTICE
Use Threaded Fittings for Manifold Piping
Use Threaded Fittings for Manifold Piping
