1、Designation: F 307 02 (Reapproved 2007)Standard Practice forSampling Pressurized Gas for Gas Analysis1This standard is issued under the fixed designation F 307; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revis
2、ion. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This practice describes the procedure for obta
3、ining asample of pressurized gas for gas analysis from a system orcomponent.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with it
4、s 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. For hazard state-ment, see Section 5.2. Terminology2.1 Definitions:2.1.1 sample portthe designated point in a sys
5、tem orcomponent from which a representative gas sample may betaken.3. Summary of Practice3.1 A sample pressure vessel is evacuated and sealed with aminimum vacuum pressure of 10-3 torr. The vessel is thenattached to the designated pressurized sample port. The pres-surized gas is allowed to enter the
6、 sample vessel until thepressure is equal to the pressure of the system or component.The pressure is secured and the sample vessel assigned forappropriate analysis.4. ApparatusNOTE 1All apparatus used in the sample taking should be verified ascleaned and packaged within the requirements of the allow
7、able contami-nation of the system, unless otherwise noted.4.1 Connecting Lines, rigid or flexible, pressure rated andidentified within recognized safety codes.4.2 Miscellaneous Fittings, as needed for sampling pointadaption.4.3 Tie-downs, suitable for sample line restraint in accordwith pressure, te
8、mperature, and recognized safety codes.4.4 Gas Sample Vessel, evacuated to a suitable pressure forthe gas analysis method to be used. This vessel should havevalves at inlet and outlet to enable lockup of vacuum orpressure. (See Fig. 1.)NOTE 2The gas sample vessel capacity is in accord with desiredsa
9、mple volume. A recommended 8-L (500-in3) volume has been deter-mined adequate to aerospace industry. The gas sample vessel must bepressure-rated for the system or component to be sampled.5. Safety Hazards5.1 Personnel must stand clear of exiting gas.5.2 Ear protection must be used when gas flow appr
10、oachessonic velocity.5.3 All lines and associated equipment must be connectedand operated within the requirements of recognized safetycodes.6. Procedure6.1 Establish and maintain a minimum purge at the sampleport.6.2 Connect one end of a suitable connecting line to thesample port, and continue to pu
11、rge.6.3 Install tie-down as required for safety code.6.4 Continue to purge and connect the other end of sampleline to sample vessel inlet.6.5 Open sample vessel inlet valve.6.6 Increase purge until system pressure is equalized insample vessel.6.7 Open outlet valve and purge for 1 s, then close andse
12、cure outlet valve.6.8 Close and secure inlet valve.6.9 Reduce system pressure to minimum purge and discon-nect sample line from sample vessel.1This practice is under the jurisdiction of ASTM Committee E21 on SpaceSimulation and Applications of Space Technology and is the direct responsibility ofSubc
13、ommittee E21.05 on Contamination. ASTM Committee D02 on PetroleumProducts and Lubricants maintains a continued interest in this practice and willmake use of it in the future.Current edition approved April 1, 2007. Published April 2007. Originallyapproved in 1966. Last previous edition approved in 20
14、02 as F 307 - 02.FIG. 1 Gas Sample Vessel.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.10 Disconnect sample line from sample port and securesystem.6.11 Identify sample vessel and contents to required safetycodes and analysis pro
15、cedure.6.12 Deliver sample vessel to analysis facility for requiredanalyses, such as impurities by gas chromatography, particlecounts, moisture content, or other desired properties.7. Keywords7.1 gas analysis; pressurized gasASTM International takes no position respecting the validity of any patent
16、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
17、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
18、 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
19、 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).F 307 02 (2007)2
