Document 2RKdyNGe0oryxZkekOGDy8095

American Society- of Heating and Ventilating Engineers Guide, 1931 of other origin. In the interests of economy and the reduction of waste the sub-committee recommends the elimination of the period except where such an omission results in an English word. Exceptions to this practice will be found in a few mathematical and chemical terms, such as sin, tan, log, Be, etc. Do not space the letters of such abbreviations as A.S.H.V.E. (not A. S. H. V. E.). The use in text of exponents for the abbreviations of square and cube and of the negative exponents for terms involving per is not recommended. The superior figures are usually not available on the keyboards of typesetting and linotype machines and composition is therefore delayed. There is also the likelihood of confusion with footnote reference numbers. These shorter forms are permissible in tables and are sometimes difficult to avoid in text. In this initial list of abbreviations for engineering and scientific terms only those most commonly used have been included. Absolute_____________________ ___________ _______ Abs Air horsepower-------------- --------------------------------- Air hp Alternating-current (adjective)---------------- .'---------- a-c American wire gage (Brown and Sharpe)----------- Awg Ampere..___________________________________ -aor A* Ampere-hour.............. ......... .....-....... ....... ...... ah or Ah* Angstrom unit--_____________________ A Antilogarithm______________ Antilog Armature . ____ ______________ --....--------arm. Atomic weight....--____________________ --at. wt Atmosphere--.................................. ......... ------ --------- atm Average..1----................................................. avg Avoirdupois.!--.------------------------------------------------advp Barometer ________________bar. Barrel___________________________ 1bbl Baume__________________________ ,,.r-......... :_____ B Birmingham wire gage-------------. _______________ Bwg Board feet (feet board measure) ;--fbm Boiler horsepower______________ _________ boiler hp Boiler pressure. -------------------------- bp Boiling point____________________------1...................-bp Brake horsepower______________________,,_______ bhp Brake horsepower-hour_________ _____________ bhp-h Brinnell hardness number----------________ -........ Bhn British thermal unit____________ ___ _______ Btu Bushel--------------- ---- ---- .--------------____________ __ --bu Calorie______________ --. Candle.________ ;............. -- Candle-hour________ ---- Candlepower_______ Center to center________ Centigram___________ ____ Centiliter________________ Centimeter______________ Centimeter-gram-second. Cent Chain_*_____________ --- Chemical________________ Chemically pure Circular_________________ Circular mils____________ Coefficient_____ --_______ Cologarithm...... ................ Concentrate_____________ -- Conductivity____________ Constant.___ .......... :----- _ .cal ........ c-h ....... Ap ...c to c ---------eg .d ____ cm ____ cgs _c or 0 ____ .ch chem -------- cp ____ .cir .clr mils __ colog ___ .cone .....cond ::..const Continental horsepower................. ....................cont hp Cord............ ...................................................................._cd Cosecant__________________ ____ ................................. esc Cosine___ ________________ ,,___........ ..................................... COS Cost, insurance and freight ...... .cif Cotangent.............................. ..................... .ctn Coulomb----- ---------------- ---- -------........ .................c or C* Counter electromotive force__ ................ counter emf Cubic___ .______________ ___--__________ cu Cubic centimeter_______ -......... ___ cu cm. cc (liquid. meaning milliliter) Cubic foot...... .............._.......--......._....... .............cu ft Cubic feet per second_________ ............................ cfs Cubic inch------------------------------ -_________ _____ .cu in. Cubic meter_____ -______ _____ _................. cu m or m8 Cubic micron --. ~-------- _ cu y (cu mu) or y3 Cubic millimeter.__ __________ ____ cu mm or mm8 Cubic yard-------------------- --------- - cu yd Current density.......................... ______ ___ __Apell out Cycles per second Cylinder.___________________ .cyl Day__ _______________________ Degree....... .................. ............... Degree Centigrade.-...... --... Degree Fahrenheit---------------Degree Kelvin............... ........... Degree R6aumur........ ............ Diameter____________ _______ Direct-current (as adjective). Dollar_______________________ Dozen__!______________ ______ Dram________________ _______ ..spell out ..........deg ...............C ........ ...... F ..........__K ____ R ........diam.. ...........d-c ..... _____.doz . ......;......dr < Electric._______________ Electric horsepower__ Electromotive force..... Elevation................-...... Engine...... ...................... Engineer...................... -- Engineering........... ........ External______________ elec ehp emf __el eng ..engr .engg ...ext Feet board measure (board feet)........................... fbm Feet per minute....................... fpm Feet.per second............. fps Fluid-'..................... .........................--.fl Foot........... ...... .....it Foot-candle............... --..............:............ ...............ft-c Abbreviation recommended by the International Electrotechnical Commission. 4 I ; Ji Chapter 1--Abbreviations, Symbols and Drafting Standards Foot-Lambert--...... .......... ................ ..........................ft-L Foot-pound______ --_______ ___________________--ft-lb Foot-pound-second.................. fps Free on board_______ --.............. -...........................f.o.b. Freezing point---------------------------- ------------...............ip Frequency------------ ,...... ............................................ freq Fusion point..;................................ _........................ ...... fnp Gallon.................................... -.............. gal Gallons per minute......... .......................... --..... --gpm Gallons per second--------- ------ ------ -----------------------gps Generator______________ .gen Grain_________________ _______ ____________ .spell out Gram.................... ...................................... ........... spell out Gram-calorie--............................................... g-cal Greatest common divisor____________ ged Henry---------------------------- ----- -------------------------h or H* High-pressure (adjective)------------------------------------h-p Horsepower---------------------------------- hp Horsepower-hour------------------- hp-h Hundredweight (112 lb)............... -------- -------------- cwt Hyperbolic sine____ ._______________ sinh Hyperbolic cosine_____________ .cosh Hyperbolic tangent........... ....... tanh Inch.---'............................... in. Inch-pound______________ ------- :------------------ --Jn-lb Inches per second------------- ips Indicated horsepower______________ -....... --ihp Indicated horsepower-hour_____________ ___ --ihp-h Intermediate-pressure (adjective)__ ^----------------- i-p Internal______________ _____________ int Joule....................................... --....................... --j or J* Kilocycle.------------------ kc Kilogram`--------------------------------------------------------------- kg Kilogram-meter------------------------------------------------ kg-m Kilograms per cubic meter__ kg per cu m or kg/m8 Kilograms per second---------------------------------------- kgps Kiloliter.kl KilometerJ_________ km Kilometers per secondkmps Kilovoltkv or kV* Kilovolt-ampere.......... ..... -....................-.kva or kVA* Kilowatt................... ................. -...... .........kw or kW* Kilowatthour'................. .......................... kwh or kWh* Latitude.............. ........................................................ --lat Least common multiple......................................... Icm Lineal foot________________________lin ft Link_________________________ ______________________ 1 Liter.1 LiquidTM.----------------------- iiq Logarithm_____________ ___ -................ ......................log Logarithm (natural)........................... ...........loge or In Longitude....................... ....................-....................... long. Low-pressure (adjective)........... --........................ ---1-p Magnetomotive force.......... ....................... .:--------- mmf Mass............. ................................ ....................:.__ spell out Mathematics (ical)--i--------- --------------------------- math Maximum____ :::,,max Mean effective pressure...... ----__________ .mep Mean horizontal candlepower.-mhep Mean spherical candlepower;msep Megawatt________________ _spell out or M W* Megohm- ^8pell out or M Q* Melting point-- ............. ........ ........mp Meter_________ Meter-kilogram--. _m-kg Mho_____________ ....................spell out Microampere-.. . ya or y A* (mu a) Microfarad-.__ __yf (mu 0 or y F* Micromicron__ ______ yy (mu mu) Micron______--. ------------------- y (mu) Microwatt__________spell out or y w (mu w) or y W* Mile_____________ '.spell out Miles per hour_______mph Miles per hour per second.... ..mphps Milliampere______________ .. Milliangstrom______________ ,,ma or mA* ________m A Milifarad_________________ _____ ___--...... ....mf ormF Milligram. ..mg Milihenry____ ,,mh or m H* Millilambert-- __________ mL Milliliter--__ ___________ ml Millimeter.......................... ,,............................. ...........mm Millimicron............................ ........................ -my (mmu) Million;______________________ ______________ spell out Million gallons per day.___________ mgd Millivolt!mv or m V* Minimum______.________________ .min Minute_________________________________ ________ min Molecular weight--______________;mol wt Month1________________________--....... ............spell out Motor-generator------------------- :m-g National Electric Code-NEC Ohm.______ _____ _______ ________.,,spell out or Q* Ohm-centimeter............ -ohm-cm Ounce-foot_________________ _________ _______ --oz-ft Ounce-inch........--...... ................ ........................--.oz-in. Parts per million_____________ ppm Peck----------------------------------------------------------- pk Pennyweight--_______________________________ dwt Pint--....................................................--:----- pt Potential...... ......... pot. Potential difference........................ ....................----pd Pound-------------------------------------------- ----------- lb Pound-foot___________ Ib-ft . Pound-inch-------------------------------------------- -------- lb-in. Pounds per brake horsepower hour__lb per bhp-h Pounds per square foot.................. ..............Ib per sq ft Pounds per square inch._______ __ ____ Jb per sq in. Pound Sterling_______________ ___________ _____ _--- Power factor.....................................................................p f- Primary.--................ ................... ........................-........ -pri Quart--..................................................................-......... qt Radian..................................-............................... spell out Reactive kilovolt-ampere.........................;-----....rkva Reactive volt-ampere-........................................--rva Revolutions per minute.:........................-- --Jpm Revolutions per second......................... -......... ----.rps m Abbreviation recommended by the International Electrotechnical Commission. 5