ASTM_F_1794_-_97_2010.pdf

Designation:F179497(Reapproved 2010)An American National StandardStandard Specification forHand-Operated,Globe-Style Valves for Gas(Except OxygenGas)and Hydraulic Systems1This standard is issued under the fixed designation F1794;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 covers the design,construction,testing,and operating requirements for hand-operated,quick-change cartridge trim,in-line body and angle-body,globe-stylevalves for use in gas(except oxygen gas)and hydraulicsystems.These valves may be used for on-off,and/or throttlingapplications.1.2 The values stated in this specification in inch-poundunits are to be regarded as the standard.The SI equivalentsshown in parenthesis are provided for information only.2.Referenced Documents2.1 ASTM Standards:2F992 Specification for Valve Label Plates2.2 American National Standards Institute(ANSI):3ANSI B1.1 Unified Screw Threads(UN and UNR ThreadForm)ANSI B1.20.1 Pipe Threads,General Purpose(Inch)ANSI B16.11 Forged Steel Fittings,Socket-Welding andThreadedANSI B16.25 Buttwelding EndsANSI B16.34 ValvesFlanged,Threaded,and Welded End2.3 Military Standards and Specifications:4MIL-STD-167-1 Mechanical Vibrations of ShipboardEquipment(Type IEnvironmental and Type IIInternally Excited)MIL-STD-740-1 Airborne Noise Measurements and Accep-tance Criteria of Shipboard EquipmentMIL-S-901 Shock Tests,H.I.(High-Impact);ShipboardMachinery,Equipment and Systems,Requirements forMIL-F-1183 Fittings,Pipe,Cast Bronze,Silver-Brazing,General Specification for2.4 Government Drawings:Naval Sea Systems Command(NAVSEA):NAVSEA 803-1385884 Unions,Fittings and Adapters Buttand Socket Welding 6000 PSI,WOG,NPSNAVSEA 803-1385943 Unions,Silver Brazing 3000 PSI,WOG,NPS,for UT InspectionNAVSEA 803-1385946 Unions,Bronze Silver Brazing,WOG for UT Inspection3.Terminology3.1 Definitions:3.1.1 bubble-tightno visible leakage over a 3-min periodusing either water submersion or the application of bubble fluidfor detection.3.1.2 external leakageleakage from the valve that escapesto atmosphere.3.1.3 flow capacitythe ability of a valve to pass flow underany given set of pressure conditions.The flow capacity of avalve is directly related to its Flow Coefficient(Cv).The Flowcoefficient is the quantity of water passing through a valve,expressed in gallons/minute(litres/minute),when 1 psi(6.895kPa)pressure drop at 60F(16C)is applied across the valve.3.1.4 globe-style valvesa basic control valve type that getsits name from the globular shape of its body with an internalbridgewall construction.It normally uses a basic rising stem/plug for the closure member.3.1.5 hydrostatic shell test pressuresthe hydrostatic testpressures that the valve is required to withstand withoutdamage.Valve operation is not required during application ofshell test pressure,but the valve must meet all performancerequirements after the shell test pressure has been removed.3.1.6 internal leakageleakage from higher pressure tolower pressure portions of the valve.3.1.7 operating pressuresthe pressures within the valveduring service.3.1.8 pressure ratingsthe pressure ratings of the valveshall be as defined in the documents listed in Table 1.The1This 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 1,2010.Published June 2010.Originallyapproved in 1997.Last previous edition approved in 2004 as F1794-97(2004).DOI:10.1520/F1794-97R10.2For 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 National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 pressure ratings(also called pressure-temperature ratings)establish the maximum allowable working(service)pressuresof a component(valve,end connections,and so forth)atvarious temperatures.3.1.9 quick-change cartridge trima construction that fa-cilitates rapid and reliable seat-ring/seat removal and replace-ment by retaining the seat-ring/seat in the valve cartridge,asopposed to a seat-ring which is threaded,welded,brazed,ormade integral with the valve body.3.1.10 seat tightnessthe ability of a valve to preventinternal leakage from the valve-inlet to the valve-outlet.4.Classification4.1 Valves shall be of the fol