ASTM F1565-2000(2006) Standard Specification for Pressure-Reducing Valves for Steam Service《蒸气用减压阀标准规范》.pdf

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1、Designation: F 1565 00 (Reapproved 2006)An American National StandardStandard Specification forPressure-Reducing Valves for Steam Service1This standard is issued under the fixed designation F 1565; the number immediately following the designation indicates the year oforiginal adoption or, in the cas

2、e of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers self-contained, internally op-erated, globe style, pressure-redu

3、cing 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:2A 105/A

4、 105M Specification for Carbon Steel Forgings forPiping ApplicationsA 182/A 182M Specification for Forged or Rolled Alloyand Stainless Steel Pipe Flanges, Forged Fittings, andValves and Parts for High-Temperature ServiceA 193/A 193M Specification for Alloy-Steel and StainlessSteel Bolting Materials

5、for High Temperature or HighPressure Service and Other Special Purpose ApplicationsA 194/A 194M Specification for Carbon and Alloy SteelNuts for Bolts for High Pressure or High TemperatureService, or BothA 216/A 216M Specification for Steel Castings, Carbon,Suitable for Fusion Welding, for High-Temp

6、erature Ser-viceA 217/A 217M Specification for Steel Castings, MartensiticStainless and Alloy, for Pressure-Containing Parts, Suit-able for High-Temperature ServiceA 515/A 515M Specification for Pressure Vessel Plates,Carbon Steel, for Intermediate- and Higher-TemperatureServiceA 516/A 516M Specific

7、ation for Pressure Vessel Plates,Carbon Steel, for Moderate- and Lower-Temperature Ser-viceA 547 Specification for Steel Wire, Alloy, Cold-HeadingQuality, for Hexagon-Head Bolts32.2 American Society of Mechanical Engineers (ASME)Standards:4B1.1 Unified Screw ThreadsB16.5 Pipe Flanges and Flanged Fit

8、tingsB16.34 ValvesFlanged, Threaded, and Welding EndB18.2.1 Square and Hex bolts and Screws, IncludingAskewHead 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

9、, and Flanges (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 Identificati

10、on ofEquipmentMIL-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 IIInternall

11、y Excited)NAVSEA T9074AQ-GIB-010/271 Nondestructive TestingRequirements for MetalsNAVSEA S9074AR-GIB-010/278 Fabrication Weldingand Inspections and Casting Inspection and Repair forMachinery, Piping and Pressure Vessels in Ships of theUnited States NavyMIL-STD-798 Nondestructive Testing, Welding, Qu

12、alityControl, Material Control and Identification and Hi-ShockTest Requirements for Piping System Components forNaval Shipboard UseMS 16142 Boss, Gasket Seal Straight Thread Tube Fitting,1This specification is under the jurisdiction of ASTM Committee F25 on Shipsand Marine Technology and is the dire

13、ct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved May 1, 2006. Published May 2006. Originallyapproved in 1994. Last previous edition approved in 2000 as F 1565 00.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custo

14、mer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.4Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990.5A

15、vailable from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Standard Dimensions for3. Terminology3.1 accuracy of reg

16、ulationthe amount by which thedownstream pressure may vary when the valve is set at anypressure within the required set pressure limit and is subjectedto any combination of inlet pressure, flow demand, andambient temperature variations, within the specified limits.3.2 design pressure and temperature

17、the 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 hydrostatic test pressurethe maximum test pressurethat the valve is required to withstand without d

18、amage. Valveoperation is not required during application of this test pres-sure, but after the pressure has been removed, the valve mustmeet all performance requirements.3.4 lockup pressurethe outlet pressure delivered by apressure-reducing valve under shutoff conditions (that is, whenthe flow deman

19、d 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 normalconditions.3.6 set pressurethe downstream pressure which the valveis set to maintain under

20、 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).3.7 set pressure limits (range of set pressure adjustment)The range of set pressure over whic

21、h 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). Thepressure-temperature ratings shown below are applicable to thepressure-containing compone

22、nts 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 Pressure RatingsThese shall conform to ASME Class150, Class 300, Class 600, or Class 1500.5. Ordering

23、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.5.1.2 Valve specification code (see 6.1.14).5.1.3 Composition and pressure rating required (se

24、e 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 Accuracy of regulation required if other than listed in7.2.5.1.7 Minimum and maximum inlet steam press

25、ures (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 lb/hour.5.1.11 Special tools, if required (see 6.1.15).5.1.12 Supplementary requirements, if a

26、ny (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 materials shall be selected to preventcorrosion, galling, seizing, and excessive wear or erosi

27、onwhere applicable. Clearances shall prevent interference as aresult of the thermal expansion. Cadmium plating is prohibited.6.1.2 General Requirements:NOTE 1Pictorial representations are for illustrative purpose only anddo not imply design.FIG. 1 Pressure-Reducing Valve (External Pressure Sensing)F

28、 1565 00 (2006)26.1.2.1 Valves will be operated, maintained, and repaired onboard ships and shall emphasize simplicity, maintainability,ruggedness, and reliability. Design shall permit access foradjustment and repair when working from either side of thevalve and without requiring removal of the valv

29、e 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 rings. The design shallprevent water buildup on the piston. The piston shall operatewithin a sepa

30、rate 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 bonnet bolting or shall bepermanently fabricated into the body. The requirement tolocate the cylind

31、er 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 shall be singleseated with integral stem. The valve shall be controlled by aspring-referenced

32、 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 operation. Edges contactingthe diaphragm shall be rounded to prevent wear and damage.Condensate

33、 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 internal or external as specified(see 5.1).6.1.3 MaintainabilityInternal parts shall permit easy dis

34、-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 correct reassembly is repeatedly assured. Partsfor a given valve shall not be physically intercha

35、ngeable orreversible, unless such parts are also interchangeable or revers-ible with regard to function, performance, and strength. ValveNOTE 1Pictorial representations are for illustrative purpose only anddo not imply design.FIG. 2 Pressure-Reducing Valve (Internal Pressure Sensing)TABLE 1 List of

36、MaterialName of Parts Composition B Composition DBody, bonnet, andbottom coverAASTM A 182/A 182M,Grade F 11ASTM A 217/A 217M,Grade WC6ASTM A 105/A 105M,ASTM A 216/A 216M,Grade WCB, ASTMA 515/A 515M,A 516/A 516M,A 547Internal trimBBCylinder liner and piston 400 series CRES500 Brinell min hard400 seri

37、es CRES500 Brinell min hardGaskets MIL-G-24716, Class B MIL-G-24716, Class BDiaphragm Ni-Cr alloy300 series CRESNi-Cr alloy300 series CRESSpringsCCBoltingAASTM A 193/A 193M,Grade B16ASTM A 194/A 194M,Grade 2HASTM A 193/A 193M,Grade B7ASTM A 194/A 194M,Grade 2HAIf desired by the manufacturer, the hig

38、her grade bolting materials may be usedin lower temperature categories (for example, Specification A 194/A 194M, Grade4 may be used for Composition B, and so forth) and also higher grade bodymaterials for Composition B and D valves (for example, Specification A 182/A 182M, Grade F 22 for Composition

39、 B, and so forth).BTrim materialsUnless otherwise specified (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

40、 the guide posts and bushings) materials shall be selectedfrom 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 o

41、r Stellite.Nongalling grades of materials shall be chosen 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 har

42、dness of either exceeds450 Brinell.(c) Where Stellite is used, 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 M

43、IL-R-17131.(2) Pilot valve trim materials. Pilot valve trim (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 te

44、mperature of the spring will exceed600F, either Inconel X-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 cor

45、rosion-resistant steel may be used.F 1565 00 (2006)3design shall permit accomplishment of the following mainte-nance actions within the time limits specified:Action Time AllowedDisassemble, replace pilot assembly, reassemble12 hRenew pilot valve assembly trim12 hRenew main valve trim34 h6.1.4 Interc

46、hangeabilityValve 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 anonselective and random basis. With the exception of matchedparts, parts hav

47、ing 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 capable of being readily installed, removed, or replacedwithout alt

48、eration, 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 not be fully compressed dur-ing any normal operation or adjustment

49、of the valve. Theworking stress shall be such that relaxation shall not exceed5 % over a 1000-h period at the nominal operating temperature.Spring ends 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 shall be in accordance with ASME B16.34except for maximum allowable t