32
Table 6: Maximum Capacity of Schedule 40 Pipe in CFH for Gas Pressures of 0.5 psig or Less
Table 7: Equivalent Lengths of Standard Pipe Fittings & Valves
Table 8: Specific Gravity Correction Factors
Figure 26: Recommended Gas Piping
C. Pressure Test. The boiler and its gas connection must
be leak tested before placing boiler in operation.
1. Protect boiler gas valve. For all testing over ½ psig,
boiler and its individual shut-off 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 shut-off valve.
2. Locate leaks using approved combustible gas
detector, soap and water, or similar nonflammable
solution.
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