1、Designation:F179100(Reapproved 2019)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 SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that ar
4、e provided for informa-tion only and are not considered standard.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendat
5、ions issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2F992 Specification for Valve Label Plates2.2 American Society of Mechanical Engineers(ASME):3B1.1 United Screw Threads(UN and UNR Thread Form)B1.20.1 Pipe Threads,General Pu
6、rpose,InchB16.11 Forged Fittings,Socket-Welding and ThreadedB16.25 Buttwelding EndsB16.34 Valves Flanged,Threaded,and Welding End2.3 Society of Automotive Engineers(SAE):4ARP 901 Aerospace Recommended PracticeBubble-PointTest Method2.4 Military Standards and Specifications:5MIL-STD-167-1 Mechanical
7、Vibrations of ShipboardEquipment(Type IEnvironmental and Type IIInternally Excited)MIL-STD-740-1 Airborne Sound Measurements andAccep-tance Criteria of Shipboard EquipmentMS16142 Boss,Gasket Seal Straight Thread Tube Fitting,Standard Dimensions forMIL-S-901 Shock Tests,H.I.(High-Impact);ShipboardMac
8、hinery,Equipment and Systems,Requirements forMIL-F-1183 Fittings,Pipe,Cast Bronze,Silver-Brazing,General Specifications for2.5 Naval SEA Systems Command(NAVSEA)GovernmentDrawings:5NAVSEA 803-1385884 Unions,Fittings and Adapters Buttand Socket Welding 6000 PSI,WOG,NPSNAVSEA 803-1385943 Unions,Silver
9、Brazing 3000 PSI,WOG,NPS,for UT InspectionNAVSEA 803-1385946 Unions,Bronze Silver Brazing,WOG for UT Inspection3.Terminology3.1 Definitions:3.1.1 absolute contaminant removal rating,nthe smallestsize of contaminant as defined in ARP 901 that the filter willretain with 100%efficiency by weight.3.1.2
10、bubble point,nthe pressure differential across asubmerged filter element required to produce a visible andsteady stream of air bubbles.Correlation between bubble pointand contaminant removal capability provides an economicalmeans to test for contaminant removal capability on a produc-tion basis.The
11、bubble point indicates the maximum pore sizeof the filter media under static conditions.3.1.3 bubble-tight,nno visible leakage over a 3-minperiod using either water submersion or the application ofbubble fluid for detection.3.1.4 clean filter element pressure drop,nthe pressuredrop across the filter
12、 element when it is new or uncontami-nated.1This specification is under the jurisdiction 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 1,2019.Published June 2019.Originallyapprov
13、ed in 1997.Last previous edition approved in 2013 as F1791 00(2013).DOI:10.1520/F1791-00R19.2For 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 Summar
14、y page onthe ASTM website.3Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Two Park Ave.,New York,NY 10016-5990,http:/www.asme.org.4Available from SAE International(SAE),400 Commonwealth Dr.,Warrendale,PA 15096,http:/www.sae.org.5Available from DLA Docume
15、nt Services,Building 4/D,700 Robbins Ave.,Philadelphia,PA 19111-5094,http:/quicksearch.dla.mil.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 principle
16、s on standardization established 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.1 3.1.5 cleanable filter element,na 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
