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Recommended Practices for the Testing and Verification of Spill,Overfill,Leak Detection and Secondary Containment Equipment at UST Facilities <br /> CONVERSIONAPPENDIX B <br /> PRESSURE AND VACUUM , <br /> Table B-1. Table B-2. <br /> Piessure Conversions for Different Units VaCUU111 Conversions-Inches Water Column <br /> for Different Units <br /> The pressures readings in RP1200 are given in pounds Use Table B-2 for converting vacuum readings in "inches <br /> per square inch gauge pressure(psig). Use Table B-1 to water column"to other units, <br /> convert psig to pressures in different units. <br /> Inches Inches Mbar Bar <br /> Mbar WaterPSIG (gauge (gauge <br /> PSIG Inches Hg (gauge Bar(gauge Column Hg pressure) pressure) <br /> pressure) pressure) 0 0 0 0 0 <br /> 0 0 0 0 -1 0.07 -0.04 -2.5 -0.002 <br /> 1 2.0 69 0.07 -2 0.15 -0.07 -5.0 -0.005 <br /> 2 4.1 138 0.14 -3 0.22 -0.11 -7.5 -0.007 <br /> 3 6.1 207 0.21 -4 0.29 -0.14 -9.9 -0.010 <br /> 4 8.1 276 0.28 -5 0.37 -0.18 -12,4 -0.012 <br /> 5 10.2 345 0.34 -6 0.44 -0.22 -14,9 -0.015 <br /> 6 12.2 414 0.41 -7 0.52 -0.25 -17.4 -0.017 <br /> 7 14.3 483 0.48 -8 0.59 -0.29 -19.9 -0.020 <br /> 8 16.3 552 0.55 -9 0.66 -0.32 -22.4 -0.022 <br /> 9 18.3 620 0.62 -10 0.74 -0.36 -24.8 -0.025 <br /> 10 20.4 689 0.69 -11 0.81 -0.40 -27.3 -0.027 <br /> 11 22.4 758 0.76 -12 0.88 -0.43 -29.8 -0.030 <br /> 12 24.4 827 0.83 -13 0.96 -0.47 -32.3 j -0.032 <br /> 13 26.5 896 0.90 -14 1.03 -0.51 -34.8 -0.035 <br /> 14 28.5 965 0.97 -15 1.11 -0.54 -37.3 -0.037 <br /> 15 30.5 1034 1..03 -16 1.18 -0.58 -39.8 -0.040 <br /> 16 32.6 1103 1.10 -17 1.25 -0.61 -42.2 -0.042 <br /> 17 34.6 1172 1.17 -18 1.33 -0.65 -44.7 -0.045 <br /> 18 36.6 1241 1.24 -19 1.40 -0.69 -47.2 -0.047 <br /> 19 38.7 1310 1.31 -20 1.47 -0.72 -49.7 -0.050 <br /> 20 40.7 1379 1.38 -21 1.55 -0.76 -52.2 -0.052 <br /> 21 42.8 1448 1.45 -22 1.62 -0.79 -54.7 -0.055 <br /> 22 1 44.8 1517 1.52 -23 1.69 -0.83 -57.2 -0.057 <br /> 23 46.8 1586 1.59 -24 1.77 -0.87 -59.6 -0.060 <br /> 24 48.9 1655 1.65 -25 1.84 -0.90 -62.1 -0.062 <br /> 25 50.9 1724 1.72 -26 1.92 -0.94 -64.6 -0.065 <br /> 26 52.9 1792 1.79 -27 1.99 -0.97 -67.1 -0.067 <br /> 27 55.0 1861 1.86 -28 2.06 -1.01 -69.6 -0-070 <br /> 28 57.0 1930 1.93 -29 2.14 -1.05 -72.1 -0.072 <br /> 29 59.0 1999 2.00 -30 2.21 -1.08 -74.5 -0.075 <br /> 30 61.1. 2068 2.07 -31 2.28 -1.12 -77.0 -0.077 <br /> Inches Hg= inches of mercury -32 2.36 -1.16 -79.5 -0.080 <br /> mbar x millibars -33 2.43 -1.19 -82.0 -0.082 <br /> -34 2.50 -1.23 -84.5 -0.084 <br /> -35 2.58 1 -1.26 1 -87.0 1 -0.087 <br /> pei.org <br />