Abbreviations and Units

Section 212 Section 212.111  Abbreviations and Units a)         The following abbreviations are used in this Part: btu British thermal units (60¼°F) dscf dry standard cubic foot ft foot ft 2 square feet fpm feet per minute gal gallon gr grains gr/scf grains per standard cubic foot gr/dscf grains per dry standard cubic foot hr hour J Joule kg kilogram kg/MW-hr kilograms per megawatt-hour km kilometer L liter lbs pounds lbs/hr pounds per hour lbs/mmbtu pounds per million btu m meter m 2 square meters mph miles per hour mg milligram mg/scm milligrams per standard cubic meter mg/dscm milligrams per dry standard cubic meter mg/L milligrams per liter Mg megagram, metric ton or tonne mi mile mmbtu million British thermal units mmbtu/hr million British thermal units per hour MW megawatt; one million watts MW-hr megawatt-hour ng nanogram; one billionth of a gram ng/J nanograms per Joule scf standard cubic foot scfm standard cubic feet per minute scm standard cubic meter T short  ton (2000 lbs) yd 2 square yards b)         The following conversion factors have been used in this Part: English Metric 2.205 lbs 1 kg 1 T 0.907 Mg 1 lb/T 0.500 kg/Mg mmbtu/hr 0.293 MW 1 lb/mmbtu 1.548 kg/MW-hr or 430 mg/J 1 mi 1.61 km 1 gr 64.81 mg 1 gr/scf 2289 mg/scm 1 ft 2 0.0929 m 2 1 ft 0.3048 m 1 gal 3.785 L