1、Designation:F156500(Reapproved 2013)An American National StandardStandard Specification forPressure-Reducing Valves for Steam Service1This standard is issued under the fixed designation F1565;the number immediately following the designation indicates the year oforiginal adoption or,in the case of re
2、vision,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 self-contained,internallyoperated,globe style,pressure-reducing valves for use
3、 in steamservice.In these valves,the downstream pressure feedback issensed by a spring-loaded diaphragm to position a pilotvalvethe pilot valve uses the inlet steam pressure to positionthe main valve plug via an operating piston.2.Referenced Documents2.1 ASTM Standards:2A105/A105M Specification for
4、Carbon Steel Forgings forPiping ApplicationsA182/A182M Specification for Forged or Rolled Alloy andStainless Steel Pipe Flanges,Forged Fittings,and Valvesand Parts for High-Temperature ServiceA193/A193M Specification for Alloy-Steel and StainlessSteel Bolting for High Temperature or High PressureSer
5、vice and Other Special Purpose ApplicationsA194/A194M Specification for Carbon andAlloy Steel Nutsfor Bolts for High Pressure or High Temperature Service,or BothA216/A216M Specification for Steel Castings,Carbon,Suit-able for Fusion Welding,for High-Temperature ServiceA217/A217M Specification for St
6、eel Castings,MartensiticStainless and Alloy,for Pressure-Containing Parts,Suit-able for High-Temperature ServiceA515/A515M Specification for Pressure Vessel Plates,Car-bon Steel,for Intermediate-and Higher-Temperature Ser-viceA516/A516M Specification for Pressure Vessel Plates,Car-bon Steel,for Mode
7、rate-and Lower-Temperature ServiceA547 Specification for Steel Wire,Alloy,Cold-HeadingQuality,for Hexagon-Head Bolts(Withdrawn 1989)32.2 American Society of Mechanical Engineers(ASME)Standards:4B1.1 Unified Screw ThreadsB16.5 Pipe Flanges and Flanged FittingsB16.34 ValvesFlanged,Threaded,and Welding
8、 EndB18.2.1 Square and Hex bolts and Screws,Including AskewHead bolts,Hex Cap Screws,and Lag Screws2.3 Federal Specification:5FED-STD-H 28 Screw-Thread Standards for Federal Ser-vices2.4 Military Standards and Specifications:5MIL-V-3 Valves,Fittings,and Flanges(Except for SystemsIndicated Herein);Pa
9、ckaging ofMIL-S-901 Shock Tests,H.I.(High Impact);ShipboardMachinery,Equipment and Systems,Requirements forMIL-R-2765 Rubber Sheet Strip,Extruded,and MoldedShapes,Synthetic,Oil ResistantMIL-P-15024 Plates,Tags and Bands for Identification ofEquipmentMIL-P-15024/5 Plates,IdentificationMIL-R-17131 Rod
10、s and Powders,Welding,SurfacingMIL-G-24716 Gaskets,Metallic-Flexible Graphite,SpiralWoundMIL-I-45208 Inspection Systems RequirementsMIL-STD-167-1 Mechanical Vibrations of ShipboardEquipment(Type IEnvironmental and Type IIInternally Excited)NAVSEA T9074AQ-GIB-010/271 Nondestructive TestingRequirement
11、s for MetalsNAVSEAS9074AR-GIB-010/278 Fabrication Welding andInspections and Casting Inspection and Repair forMachinery,Piping and Pressure Vessels in Ships of theUnited States NavyMIL-STD-798Nondestructive Testing,Welding,QualityControl,Material Control and Identification and Hi-ShockTest Requireme
12、nts for Piping System Components forNaval Shipboard UseMS 16142 Boss,Gasket Seal Straight Thread Tube Fitting,Standard Dimensions for1This specification is under the jurisdiction of ASTM Committee F25 on Shipsand Marine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery a
13、nd Piping Systems.Current edition approved May 1,2013.Published May 2013.Originallyapproved in 1994.Last previous edition approved in 2006 as F1565 00(2006).DOI:10.1520/F1565-00R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.F
14、or Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Three P
15、ark Ave.,New York,NY 10016-5990.5Available 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 3.Terminology3.1 accuracy of regul
16、ationthe amount by which the down-stream pressure may vary when the valve is set at any pressurewithin the required set pressure limit and is subjected to anycombination of inlet pressure,flow demand,and ambienttemperature variations,within the specified limits.3.2 design pressure and temperaturethe maximum pres-sure and temperature the valve should be subjected to underany condition.These are the pressure and temperature uponwhich the strength of the pressure-containing envelope isbased.3.3 hyd
