1、Designation:D191495(Reapproved 2022)Standard Practice forConversion Units and Factors Relating to Sampling andAnalysis of Atmospheres1This standard is issued under the fixed designation D1914;the number immediately following the designation indicates the year oforiginal adoption or,in the case of re
2、vision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice provides units and factors useful formembers of the air pollution and meteorological commu
3、nities.1.2 This practice is used together with IEEE/ASTM SI-10,which discusses SI units and contains selected conversionfactors for inter-relation of SI units and some commonly usednon-metric units.1.3 This international standard was developed in accor-dance with internationally recognized principle
4、s on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1356 Terminology Relating to Sampling a
5、nd Analysis ofAtmospheresE11 Specification for Woven Wire Test Sieve Cloth and TestSievesIEEE/ASTM SI-10 Standard for Use of the InternationalSystem of Units(SI):The Modern Metric System3.Significance and Use3.1 ASTM requires the use of SI units in all its publicationsand their use in reporting atmo
6、spheric measurement data.However,there are historic data and even data currentlyreported that are based on a variety of units of measurement.This practice tabulates factors that are necessary to convertsuch data to SI and other units of measurement.3.2 IEEE/ASTM SI-10 does not list all the conversio
7、nfactors commonly used in air pollution and meteorologicalfields.This practice supplements IEEE/ASTM SI-10.3.3 The values reported here were obtained from a numberof standard publications.They were adjusted to five figures andorganized in a rational order.All values reflect the latestinformation fro
8、m the 16th General Conference on Weights andMeasurements held in 1979.3.4 The factors in Table 1 are provided to change units ofmeasurement from one system to related units in other systems,as well as to smaller or larger units in the same system.3.5 Values of units in the left column may be convert
9、ed tovalues of units in the right column merely by multiplying bythe conversion factor provided in the center column.1This practice is under the jurisdiction ofASTM Committee D22 on Air Qualityand is the direct responsibility of Subcommittee D22.01 on Quality Control.Current edition approved Sept.1,
10、2022.Published September 2022.Originallyapproved in 1961.Last previous edition approved in 2014 as D1914 95(2014).DOI:10.1520/D1914-95R22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume info
11、rmation,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization es
12、tablished in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1TABLE 1 Conversion UnitsMultiplyByTo ObtainTemperatureDegrees Fahrenheit(F)+459.721Degrees Fahrenheit Abs
13、olute or Rankine(R)Degrees Fahrenheit(F)3259Degrees Celsius(C)Degrees Celsius(C)+273.151Kelvins(K)Degrees Celsius(C)+17.781.8Degrees Fahrenheit(F)Degrees Rankine(R)459.721Degrees Fahrenheit(F)Kelvins(K)273.151Degrees Celsius(C)PressureDynes per square centimetre1.4504 10 5Pounds per square inch10.19
14、7 10 4Grams per square centimetre1 106Bars0.1PascalsPounds per square inch absolute(psia)70.307Grams per square centimetre absolute51.715Millimetres of mercury absolute144Pounds per square foot absolute1Pounds per square inch gage+14.6966894.8PascalsPounds per square inch gage(psig)70.307Grams per s
15、quare centimetre51.715Millimetres of mercury at 0 C27.673Inches of water at 4 C1Pounds per square inch absolute 14.6966894.8PascalsInches of water(at 4 C)0.03614Pounds per square inch0.07355Inches of mercury0.57818Ounces per square inch25.399Kilograms per square metre2490.8Dynes per square centimetr
16、e249.2PascalsInches of mercury(at 0 C)0.49116Pounds per square inch13.595Inches of water at 4 C345.31Kilograms per square metre3.3864 104Dynes per square centimetre3386.4PascalsMillimetres of mercury(at 0 C)0.01934Pounds per square inch1.3595Grams per square centimetre1333.2Dynes per square centimetre133.32PascalsCentimetres of mercury(at 0 C)1.3332 104Dynes per square centimetre135.95Kilograms per square metre27.845Pounds per square foot1333.2PascalsAtmosphere(normal)760Millimetres of mercury a