1、Designation: F1565 00 (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
2、 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 self-contained, internallyoperated, globe style, pressure-reducing
3、 valves for use 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
4、Specification for 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
5、 or High PressureService and Other Special Purpose ApplicationsA194/A194M Specification for Carbon and Alloy 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/A2
6、17M Specification for Steel 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
7、 Plates, Car-bon Steel, for Moderate- and Lower-Temperature ServiceA547 Specification for Steel Wire, Alloy, Cold-HeadingQuality, for Hexagon-Head Bolts (Withdrawn 1989)32.2 American Society of Mechanical Engineers (ASME)Standards:4B1.1 Unified Screw ThreadsB16.5 Pipe Flanges and Flanged FittingsB16
8、.34 ValvesFlanged, Threaded, and Welding 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 F
9、langes (Except for SystemsIndicated Herein); Packaging 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 ofEq
10、uipmentMIL-P-15024/5 Plates, IdentificationMIL-R-17131 Rods 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 Excit
11、ed)NAVSEA T9074AQ-GIB-010/271 Nondestructive TestingRequirements 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-798 Nondestructive Testing, Welding, QualityCon
12、trol, Material Control and Identification and Hi-ShockTest Requirements 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
13、and is the direct responsibility of Subcommittee F25.11 onMachinery and 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 AS
14、TM 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Ameri
15、can Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park 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,
16、 PO Box C700, West Conshohocken, PA 19428-2959. United States13. Terminology3.1 accuracy of regulationthe 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, a
17、nd 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 hy
18、drostatic test pressurethe maximum test pressurethat the valve is required to withstand without damage. Valveoperation is not required during application of this testpressure, but after the pressure has been removed, the valvemust meet all performance requirements.3.4 lockup pressurethe outlet press
19、ure delivered by apressure-reducing valve under shutoff conditions (that is, whenthe flow demand is reduced to a point where it is equal to orless than the allowable leakage as defined in 8.3).3.5 nominal pressurethe approximate maximum pressureto which the valve will be subjected in service under n
20、ormalconditions.3.6 set pressurethe downstream pressure which the valveis set to maintain under a given set of operating conditions (thatis, inlet pressure and flow). Ideally, the valve should be set atdownstream pressure approximately equal to the mid-point ofthe set pressure limits (defined in 3.7
21、).3.7 set pressure limits (range of set pressure adjustment)The range of set pressure over which the valve can be adjustedwhile meeting the specified performance requirements.4. Classification4.1 Valves shall be of the following compositions andpressure ratings, as specified (see Section 5 and 6.1.7
22、). Thepressure-temperature ratings shown below are applicable to thepressure-containing components of the valve. See Fig. 1 andFig. 2.4.1.1 Composition B114 % chromium,12 % molybde-num maximum temperature 1000F (see 6.1.7).4.2 Composition Dcarbon steel maximum temperature775F (see 6.1.7).4.3 Pressur
23、e RatingsThese shall conform to ASME Class150, Class 300, Class 600, or Class 1500.5. Ordering Information5.1 Ordering documentation for valves under this specifica-tion shall include the following information, as required, todescribe the equipment adequately.5.1.1 ASTM designation and year of issue
24、.5.1.2 Valve specification code (see 6.1.14).5.1.3 Composition and pressure rating required (see Section4).5.1.4 Trim materials where specific requirement is known(see Table 1, Footnote B, Note 2).5.1.5 Whether internal or external reduced pressure sensingline is required (see 6.1.2.1).5.1.6 Accurac
25、y of regulation required if other than listed in7.2.5.1.7 Minimum and maximum inlet steam pressures (psig)(see 7.3 and S1.5).5.1.8 Maximum inlet steam temperature (F) (see S1.5).5.1.9 Range of set pressure adjustment for valves, if otherthan listed in 7.4.5.1.10 Maximum and minimum capacity required
26、 lb/hour.5.1.11 Special tools, if required (see 6.1.15).5.1.12 Supplementary requirements, if any (see S1 throughS4).6. Valve Construction and Coding6.1 Valves shall incorporate the design features specified in6.1.1-6.1.14.6.1.1 Materials of ConstructionMaterials shall be asspecified in Table 1. All
27、 materials shall be selected to preventcorrosion, galling, seizing, and excessive wear or erosionwhere applicable. Clearances shall prevent interference as aresult of the thermal expansion. Cadmium plating is prohibited.NOTE 1Pictorial representations are for illustrative purpose only anddo not impl
28、y design.FIG. 1 Pressure-Reducing Valve (External Pressure Sensing)F1565 00 (2013)26.1.2 General Requirements:6.1.2.1 Valves will be operated, maintained, and repaired onboard ships and shall emphasize simplicity, maintainability,ruggedness, and reliability. Design shall permit access foradjustment
29、and repair when working from either side of thevalve and without requiring removal of the valve body from theline. Valves shall be of the self-contained, internal-operatedtype as described in 1.1.6.1.2.2 The operating piston shall be separate from the mainvalve and fitted with one or more piston rin
30、gs. The design shallprevent water buildup on the piston. The piston shall operatewithin a separate hardened steel cylinder liner located in thevalve body so that removal of the valve bonnet provides accessto the top of the piston assembly. The cylinder liner shall beheld in place by way of the bonne
31、t bolting or shall bepermanently fabricated into the body. The requirement tolocate the cylinder liner in the body may be waived where it isshown that an alternative location provides a satisfactorymaintenance configuration. Pilot valve and diaphragm cham-bers shall be self-draining. The pilot valve
32、 shall be singleseated with integral stem. The valve shall be controlled by aspring-referenced metal diaphragm and shall open against highpressure. A return spring shall keep the pilot valve in contactwith the diaphragm at all times. The diaphragm shall not travelthrough center during any phase of o
33、peration. Edges contactingthe diaphragm shall be rounded to prevent wear and damage.Condensate chamber or other suitable means shall be providedto preclude internal wetted springs from being exposed totemperatures exceeding their material limitations. The reducedpressure sensing line shall be intern
34、al or external as specified(see 5.1).6.1.3 MaintainabilityInternal parts shall permit easy dis-assembly and reassembly with standard tools and shall prevent,as far as practical, the incorrect reassembly of parts. Position-ing and alignment of all parts in assembly shall use positivemeans so that cor
35、rect reassembly is repeatedly assured. Partsfor a given valve shall not be physically interchangeable orNOTE 1Pictorial representations are for illustrative purpose only anddo not imply design.FIG. 2 Pressure-Reducing Valve (Internal Pressure Sensing)TABLE 1 List of MaterialName of Parts Composition
36、 B Composition DBody, bonnet, andbottom coverAASTM A182/A182M,Grade F11ASTM A217/A217M,Grade WC6ASTM A105/A105M,ASTM A216/A216M,Grade WCB, ASTMA515/A515M,A516/A516M,A547Internal trimBBCylinder liner and piston 400 series CRES500 Brinell min hard400 series CRES500 Brinell min hardGaskets MIL-G-24716,
37、 Class B MIL-G-24716, Class BDiaphragm Ni-Cr alloy300 series CRESNi-Cr alloy300 series CRESSpringsCCBoltingAASTM A193/A193M,Grade B16ASTM A194/A194M,Grade 2HASTM A193/A193M,Grade B7ASTM A194/A194M,Grade 2HAIf desired by the manufacturer, the higher grade bolting materials may be used inlower tempera
38、ture categories (for example, Specification A194/A194M, Grade 4may be used for Composition B, and so forth) and also higher grade bodymaterials for Composition B and D valves (for example, Specification A182/A182M, Grade F22 for Composition B, and so forth).BTrim materialsUnless otherwise specified
39、(see 5.1), the valve manufacturershall select from the categories listed below the trim materials best suited to meetthe requirements.( 1) Main valve trim materials. Main valve trim (defined as consisting of the seator seat ring and plug and the guide posts and bushings) materials shall be selectedf
40、rom the following:( a) StelliteTrim to be Stellite.(b) Hardened corrosion-resistant steelHardened corrosion-resistant steelplug (400 series or 17-4 PH) and Stellite seat or seat ring. Guiding surfaces to behardened corrosion-resistant steel or Stellite.Nongalling grades of materials shall be chosen
41、to prevent galling betweenrubbing surfaces. A difference in hardness of at least 100 points Brinell shall bemaintained between the rubbing guiding surfaces. This requirement does notapply if both the guide surfaces are Stellited or if the hardness of either exceeds450 Brinell.(c) Where Stellite is u
42、sed, it shall consist of either wrought Stellite 6B, castStellite 6, or an inlay of Stellite (not less than332-in. thickness for main seat anddisk surfaces). Where inlays are used, welding rods shall be in accordance withType MIL-RCoCr-A or MIL-R-17131.(2) Pilot valve trim materials. Pilot valve tri
43、m (defined as consisting of the seat,valve, and guiding surfaces) shall be made from one or a combination of thefollowing materials:(a) 400 series or 17-4PH corrosion-resistant steel-hardened.(b) Stellite.CSpring materialsWhere the working temperature of the spring will exceed600F, either Inconel X-
44、750 or A-286 alloy steel shall be used. Where the workingtemperature of the spring exceeds 450F, but not 600F, Inconel 600 or tungstentool steel may also be used. Where the working temperature of the spring will notexceed 450F, 300 series corrosion-resistant steel may be used.F1565 00 (2013)3reversi
45、ble, unless such parts are also interchangeable or revers-ible with regard to function, performance, and strength. Valvedesign shall permit accomplishment of the following mainte-nance actions within the time limits specified:Action Time AllowedDisassemble, replace pilot assembly, reassemble12 hRene
46、w pilot valve assembly trim12 hRenew main valve trim34 h6.1.4 InterchangeabilityValve design shall permit inter-changeability without individual modification of like partsbetween all valves. Each part shall have part number identityand shall be replaceable from stock or the manufacturer on anonselec
47、tive and random basis. With the exception of matchedparts, parts having the same manufacturers part number shallbe directly interchangeable with each other with respect toinstallation (physical) and performance (function). Physicallyinterchangeable assemblies, components, and parts are thosethat are
48、 capable of being readily installed, removed, or replacedwithout alteration, misalignment, or damage to parts beinginstalled or to adjoining parts. Fabrication operations such ascutting, filing, drilling, reaming, hammering, bending, prying,or forcing shall not be required.6.1.5 SpringsSprings shall
49、 not be fully compressed duringany normal operation or adjustment of the valve. The workingstress shall be such that relaxation shall not exceed 5 % over a1000-h period at the nominal operating temperature. Springends shall be squared and ground.6.1.6 ThreadsThreads shall conform to ASME B1.1.Where necessary, provisions shall be incorporated to preventaccidental loosening of threaded parts. Pipe threads shall not beused. ASME B18.2.1 hex-head standards shall be used.6.1.7 Pressure-Temperature RatingsValve pressure-temperature rating sh
