9
Table 5: Maximum Capacity of Schedule 40 Pipe in CFH For Natural Gas Pressures of 0.5 psig or Less
Table 7: Specific Gravity Correction Factors for
Natural Gas
Table : Fitting Equivalent Lengths
C.
Pressure test.
The boiler and its gas connection must
be leak tested before placing boiler in operation.
1. Protect boiler gas control valve. For all testing over
½ psig, boiler and its individual shutoff valve must
be disconnected from gas supply piping. For testing
at ½ psig or less, isolate boiler from gas supply
piping by closing boiler's individual manual shutoff
valve.
2. Locate leaks using approved combustible gas
detector, soap and water, or similar nonflammable
solution. Do not use matches, candles, open flames,
or other ignition source.
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