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Figure 12: Hydraulic Draw-Up of Sections
B. HYDROSTATIC TEST — After the boiler sections
have been assembled, it is essential that the boiler be
hydrostatically tested before the canopy, flue cover
plates, jacket, or piping is installed.
1. Tankless Heater Installation
If boiler is ordered with tankless heaters, install
heaters with the gaskets provided. Table IV
on Page 37 gives the maximum number of heaters
permissible per assembly and the heater ratings.
2. Plug all boiler tappings and fill boiler completely
with cold water.
Figure 13: Boiler Section Assembly
4. EXAMINE BOILER CAREFULLY, INSIDE AND
OUTSIDE, to insure against leaks from cocked
nipples or through concealed breakage caused in
shipping and handling. This precaution is for your
protection and will simplify handling of necessary
replacements and adjustment claims.
5. After making certain that there are no leaks, drain
boiler and remove plugs for boiler trim and other
connections.
3. All completed boilers must satisfactorily pass the
prescribed hydrostatic test.
a. STEAM BOILERS:
The assembled boiler must
be subjected to a hydrostatic test of 45 psig to 55
psig.
b. HOT WATER BOILERS: The assembled boiler
must be subjected to a hydrostatic test of not less
than 1½ times the maximum allowable working
pressure (MAWP).
CAUTION
DO NOT install gauge until after hydrostatic
testing the boiler. Gauge failure may result.
WARNING
Failure to properly hydrotest all boilers at
the correct pressure may result in section
assembly failure in operation.