Where:
Vmax = Maximum permitted velocity, m/sec (ft/sec)
HT = Net heating value of the gas being combusted, MJ/scm (Btu/scf).
K1 = 8.706 m/sec (metric units)
= 28.56 ft/sec (English units)
K2 = 0.7084 m4/(MJ-sec) (metric units)
= 0.087 ft4/(Btu-sec) (English units)
Where:
K = Conversion constant, 1.740 * 10-7 (g-mole)(MJ)/(ppm-scm-kcal) (metric units) = 4.674 * 10-6 [(g-mole)(Btu)/(ppm-scf-kcal)] (English units)
Ci = Concentration of sample component "i," ppm
Hi = Net heat of combustion of sample component "i" at 25 °C and 760 mm Hg (77 °F and 14.7 psi), kcal/g-mole
%VL = (VL/VT) * 100
Where:
%VL = Percent leaking valves
VL = Number of valves found leaking
VT = The sum of the total number of valves monitored
40 C.F.R. §60.485