1、Designation:F179100(Reapproved 2013)An American National StandardStandard Specification forFilters Used in Air or Nitrogen Systems1This standard is issued under the fixed designation F1791;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revis
2、ion,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 covers the design,construction,test,and performance requirements for air or nitrogen sys
3、tem filters,referred to hereinafter as filters.These filters are intended to beinstalled in-line to protect equipment from particular contami-nation.1.2 The values stated in this specification in inch-poundsunits are to be regarded as the standard.The SI equivalentshown in parentheses are provided f
4、or information only.2.Referenced Documents2.1 ASTM Standards:2F992 Specification for Valve Label Plates2.2 American Society of Mechanical Engineers(ASME):B1.1 United Screw Threads(UN and UNR Thread Form)3B1.20.1 Pipe Threads,General Purpose(Inch)3B16.11 ForgedSteelFittings,Socket-WeldingandThreaded3
5、B16.25 Buttwelding Ends3B16.34 Flanged,Threaded,and Welded End32.3 Society of Automotive Engineers(SAE):ARP 901 Aerospace Recommended PracticeBubble-PointTest Method42.4 Military Standards and Specifications:MIL-STD-167-1 Mechanical Vibrations of ShipboardEquipment(Type IEnvironmental and Type IIInt
6、ernally Excited)5MIL-STD-740-1 Airborne Sound Measurements andAccep-tance Criteria of Shipboard Equipment5MS16142 Boss,Gasket Seal Straight Thread Tube Fitting,Standard Dimensions for5MIL-S-901 Shock Tests,H.I.(High-Impact);ShipboardMachinery,Equipment and Systems,Requirements for5MIL-F-1183 Fitting
7、s,Pipe,Cast Bronze,Silver-Brazing,General Specifications for52.5 Naval SEA Systems Command(NAVSEA):GovernmentDrawings:NAVSEA 803-1385884 Unions,Fittings and Adapters Buttand Socket Welding 6000 PSI,WOG,NPS5NAVSEA 803-1385943 Unions,Silver Brazing 3000 PSI,WOG,NPS,for UT Inspection5NAVSEA 803-1385946
8、Unions,Bronze Silver Brazing,WOG for UT Inspection53.Terminology3.1 Definitions:3.1.1 absolute contaminant removal ratingthe smallestsize of contaminant as defined in ARP 901 that the filter willretain with 100%efficiency by weight.3.1.2 bubble pointthe pressure differential across a sub-merged filt
9、er element required to produce a visible and steadystream of air bubbles.Correlation between bubble point andcontaminant removal capability provides an economical meansto test for contaminant removal capability on a productionbasis.The bubble point indicates the maximum pore size of thefilter media
10、under static conditions.3.1.3 bubble-tightno visible leakage over a 3-min periodusing either water submersion or the application of bubble fluidfor detection.3.1.4 clean filter element pressure dropthe pressure dropacross the filter element when it is new or uncontaminated.3.1.5 cleanable filter ele
11、menta filter element that,afterbeing contaminated to its dirt-holding capacity(contaminatedfilter element pressure drop),can be restored by cleaning tooperational condition and with a pressure drop not exceedingthe required clean filter element pressure drop.3.1.6 contaminant removal ratingthis is a
12、 measure of thesize of contaminants that the filter can remove from the flowstream.3.1.7 contaminated filter element pressure drop the pres-sure drop across the filter element when it is contaminated tothe point where cleaning or replacement is required.1This specification is under the jurisdiction
13、of ASTM Committee F25 on Shipsand Marine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved May 1,2013.Published May 2013.Originallyapproved in 1997.Last previous edition approved in 2006 as F1791 00(2006).DOI:10.1520/F1791-00R1
14、3.2For 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 American Society of Mechanical Engineers(ASME),A
15、SMEInternational Headquarters,Three Park Ave.,New York,NY 10016-5990.4Available from Society of Automotive Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001.5Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.Copyright
16、 ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.8 differential pressure indicator actuation pressurethepressure drop across the filter element at which the differentialpressure indicator actuates.3.1.9 disposable filter elementa filter element that,afterbeing contaminated to its dirt-holding capacity(contaminatedfilter element pressure drop),cannot be restored to operationalconditions and thereafter should be replaced.3.1.10 external leaka
