ASTM_D_3283_-_98_2012.pdf

Designation:D328398(Reapproved 2012)Standard Specification forAir as an Electrical Insulating Material1This standard is issued under the fixed designation D3283;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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 specification applies to air used as an electricalinsulating material in electrical equipment.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D2029 Test Methods for Water Vapor Content of ElectricalInsulating Gases by Measurement of Dew PointE105 Practice for Probability Sampling of MaterialsE260 Practice for Packed Column Gas Chromatography2.2 Other Documents:Specification G-7.1 Commodity Specification for Air33.Classification3.1 This specification shall apply to Type I,gaseous air.4.Manufacture4.1 This specification applies to both atmospheric air and toair synthesized by blending oxygen and nitrogen in properproportions.5.Composition and Properties5.1 The material shall conform to the chemical requirementsspecified in Table 1.6.Sampling6.1 Gaseous Air in High Pressure Metal ContainersExtract samples from the container or containers with anappropriate pressure reducing regulator.Screw the pressureregulator inlet connection on to the container valve outlet.Connect the regulator outlet connection to the gas samplingpipe or to the gas analyzing equipment by means of metal orglass tubing except that rubber tubing may be used to securebutt joints in metal-to-glass or glass-to-glass tubing.Take careto ensure that all tubing is clean and dry and the samplingapparatus is thoroughly purged of atmospheric air before thesample is taken.Where a multiplicity of containers are to besampled,follow Practice E105 if it is considered satisfactory tosample less than the total number of containers.7.Test Methods7.1 The components enumerated in this specification shallbe determined in accordance with the following:7.1.1 Carbon Monoxide and Carbon Dioxide PracticeE260.7.1.2 OxygenPractice E260.7.1.3 Dew PointTest Methods D2029.8.Shipping8.1 Air for shipment shall be packaged in metal containersthat comply with the requirements of and be approved by theInterstate Commerce Commission.The inside of the cylindersshall be dry and free from oil and corrosive chemicals.9.Keywords9.1 dielectric;dielectric air;dielectric gas;electrical insu-lating gas;gaseous air;insulating air1This specification is under the jurisdiction of ASTM Committee D27 onElectrical Insulating Liquids and Gasesand is the direct responsibility of Subcom-mittee D27.02 on Gases and Non-Mineral Oil Liquids.Current edition approved May 1,2012.Published May 2012.Originallyapproved in 1973.Last previous edition approved in 2004 as D3283 98(2004).DOI:10.1520/D3283-98R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from the Compressed GasAssn.,Inc.,500 FifthAve.,New York,NY10036.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised that determination of the validity of any such patent rights,and the riskof infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(www.astm.org).Permission rights to photocopy the standard may also be secured from the ASTM website(