1、Designation: D 3283 98 (Reapproved 2004)Standard Specification forAir as an Electrical Insulating Material1This standard is issued under the fixed designation D 3283; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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
3、 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 Stand
4、ards:2D 2029 Test Methods for Water Vapor Content of ElectricalInsulating Gases by Measurement of Dew PointE 105 Practice for Probability Sampling of MaterialsE 260 Practice for Packed Column Gas Chromatography2.2 Other Documents:Specification G-7.1 Commodity Specification for Air33. Classification3
5、.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 i
6、n 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 samp
7、lingpipe 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 bef
8、ore thesample is taken. Where a multiplicity of containers are to besampled, follow Practice E 105 if it is considered satisfactoryto sample less than the total number of containers.7. Test Methods7.1 The components enumerated in this specification shallbe determined in accordance with the following
9、:7.1.1 Carbon Monoxide and Carbon DioxidePracticeE 260.7.1.2 OxygenPractice E 260.7.1.3 Dew PointTest Methods D 2029.8. 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 cylin
10、dersshall 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 Gases and is the direct
11、 responsibility of Subcom-mittee D 27.02 on Gases and Synthetic Liquids.Current edition approved Oct. 1, 2004. Published November 2004. Originallyapproved in 1973. Last previous edition approved in 1998 as D 3283 98.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM
12、 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 Gas Assn., Inc., 500 Fifth Ave., New York, NY10036.TABLE 1 Composition and Properties for AirAType IOxygen, volume
13、 % 19.5 to 23.5Carbon monoxide, max, volume % 0.0020Carbon dioxide, max, volume % 0.10Nitrogen predominantly balanceDew point, max, C 58ABy agreement between purchaser and manufacturer, analysis may be requiredand limits established for elements or compounds not specified in the table ofchemical com
14、position.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 exp
15、ressly 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 revis
16、ed, 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
17、 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).D 3283 98 (2004)2
