ANSI ASTM F1985-1999 Standard Specification for Pneumatic-Operated Globe-Style Control Valves《气动球形控制阀规范》.pdf

1、Designation: F1985 99 (Reapproved 2011)An American National StandardStandard Specification forPneumatic-Operated, Globe-Style, Control Valves1This standard is issued under the fixed designation F1985; the number immediately following the designation indicates the year oforiginal adoption or, in the

2、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, test-ing, and operating requirements

3、 for pneumatic-operated, globe-style, control valves complete with actuators for various fluidsystems (steam, gas, and liquid applications). The controlvalves with actuators may be procured under this specificationcomplete with all associated pneumatic instrumentation neces-sary for the valve to fun

4、ction in the system application;however, complete and detailed requirements for air instru-mentation are beyond the scope of this specification and thusare not included here. This specification is not intended tocover quarter-turn or multi-turn stem valves.1.2 The values stated in SI units are to be

5、 regarded as thestandard. The values given in parentheses are for informationonly.2. Referenced Documents2.1 The most recent edition or revision of the followingstandards or specifications shall, to the extent specified in thisspecification, form a part of this specification.2.2 ASME Standards:2B1.1

6、 Unified Screw Threads (UN and UNR Thread Form)B1.20.1 Pipe Threads, General Purpose (Inch)B16.1 Cast Iron Pipe Flanges and Flanged Fittings, Class25, 125, 250 and 800B16.5 Pipe Flanges and Flanged FittingsB16.11 Forged Steel Fittings, Socket-Welding and ThreadedB16.25 Buttwelding EndsB16.24 Bronze

7、Pipe Flanges and Flanged fittings, Class 150and 300B16.34 Valves - Flanged and Buttwelding End Steel, NickelAlloy, and Other Special Allows2.3 Manufacturers Standardization Society of the Valve andFitting Industry:3MSS SP-25 Standard Marking System for Valves, Fittings,Flanges and Unions2.4 Fluid Co

8、ntrols Institute Standard:4FCI 70-2 Control Valve Seat Leakage2.5 Military Standards and Specifications:5MIL-STD-798 Nondestructive Testing, Welding QualityControl Material Control and Identification and Hi-ShockTest Requirements for Piping System Components forNaval Ship UseMIL-S-901 Shock Tests, H

9、.I. (High Impact); ShipboardMachinery, Equipment and Systems, Requirements forMIL-STD-167-1 Mechanical Vibrations of ShipboardEquipment (Type I Environmental and Type II Inter-nally Excited)MS-16142 Boss Gasket-Seal Straight Thread Tube Fitting,Standard Dimensions forMIL-F-1183 Fittings, Pipe, Cast

10、Bronze, Silver Brazing,General Specification forMIL-F-20042 Flanges, Pipe and Bulkhead, Bronze (SilverBrazing)2.6 Government Drawings and Publications:Naval Sea Systems Command (NAVSEA):5803-1385946 Unions, Bronze, Silver Brazing Alloy. ForWater, Oil, and Gas803-1385943 Unions, Silver Brazing, 3000

11、lb/in.2, WOG,NPS, for UT Inspection803-1385884 Unions, Butt and SocketWelding, 6000 lb/in.2WOG, NPS, For UT Inspections2.7 ISA Standard:6ISA-S75.05 Standard for Control Valve Terminology1This specification is under the jurisdiction of ASTM committee F25 on Shipsand Marine Technology and is the direc

12、t responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved Nov. 1, 2011. Published November 2011. Originallyapproved in 1999. Last previous edition approved in 2005 as F1985 99(2005).DOI: 10.1520/F1985-99R11.2Available from American Society of Mechanical Engineer

13、s (ASME), ASMEInternational Headquarters, Three Park Ave., New York, NY 10016-5990, http:/www.asme.org.3Available from Manufacturers Standardization Society of the Valve and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA 22180-4602, http:/www.mss-.4Available from Fluid Controls Institute, 1300

14、 Sumner Ave., Cleveland, OH44115.5Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.6Available from International Society for Measurement and Control, 67 Alex-ander Dr., PO Box 12277, Rese

15、arch Triangle Park, NC 27709.1Copyright. (C) ASTM International, 100 Barr Harbour Dr., P.O. box C-700 West Conshohocken, Pennsylvania 19428-2959, United States3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 actuatorthe unit that converts a pneumatic pressuresignal into a force

16、 to position the valve plug.3.1.2 bonnetthe upper portion of the valve body subas-sembly to which the yoke attaches. The bonnet contains thevalve stem packing.3.1.3 dead bandthe range through which input signal canbe varied, upon reversal of direction, without an observablechange in the value stem p

17、osition.3.1.4 equal-percentage openingan equal-percentage flowcharacteristic of a control valve provides a change in flow, withthe change in valve lift, that is a constant percentage of the flowbefore the change was made.3.1.5 flow coeffcient (CV)A basic capacity rating forvalves that relates flow r

18、ate to the inlet and outlet pressure fora particular fluid in the full-open position of the valve. It isdefined as the number of litres per seconds (gallons/min) of16C (60F) water that will flow through the valve with a 6.9kPa (1 psi) pressure drop (Dp) across the valve.3.1.6 globe-style valvea basi

19、c control valve type that getsits name from the globular shape of its body. It normally usesa basic rising stem/plug for the closure member.3.1.7 hydrostatic shell test pressurethe hydrostatic testpressure that the valve body is required to withstand withoutdamage or leakage. Valve operation is not

20、required duringapplication of this test pressure, but the valve shall meet allperformance requirements after the pressure has been removed.3.1.8 hysteresisthe maximum difference in output valuefor any single input value during a calibration cycle, excludingerrors as a result of dead band.3.1.9 instr

21、umentationthe term instrumentation, whenused in this specification, refers to any instrumentation, that is,pilot controllers, transmitters, relays, selectors, positioners,instrument air reducing valves, and strainers/filters required foroperation of the control valve in the system.3.1.10 internal tr

22、iminternal parts of the control valve,including seat rings, plug, stem, guide bushings, cage, pistons,and so forth.3.1.11 linear-openinga linear-opening flow characteristicof a control valve provides a change in flow that is linearlyproportional with valve lift.3.1.12 linearitythe measure of how clo

23、se a plot of thevalve stem travel (in response to an increasing and a decreasinginput signal) conforms to a straight line. Linearity is normallyexpressed as the ratio (in percentage) of the maximum devia-tion from a straight line connecting the end points of the fulloperational valve stem stroke.3.1

24、.13 manual overridethe manual override allows valveoperation manually. The manual override feature has the abilityto oppose and overcome an opening or closing pneumaticcontrol signal in controlling valve position.3.1.14 pneumatic-operated control valvea valve installeddirectly in the fluid system, w

25、hich translates a pneumatic signalinto a change in flow resistance for the system fluid.3.1.15 pressure ratingthe pressure rating of the valveshall be as defined in the documents listed in Table 1. Thepressure ratings (also called pressure-temperature ratings)establish the maximum allowable working

26、(service) pressuresof a component (valve, end connections, and so forth) atvarious temperatures.3.1.16 quick change cage trima gasket or an O-ringsealed seat ring held in position by a cage, which may be eitherseparate from or integral with the seat ring. The cage is held inposition by either the bo

27、nnet or bottom flange. This designshall permit the rapid replacement of all internal trim byavoiding the use of any threads located within the valve body,such as seat ring threads.3.1.17 quick-openinga quick-opening flow characteristicof a control valve provides large changes in flow for smallchange

28、s in valve lift.3.1.18 rangeabilitya measure of the usable range of acontrol valve and defined as the ratio of the maximum to theminimum controllable CV. These maximum and minimumcontrollable CVs establish the throttling range over which agiven control characteristic can be maintained and withinwhic

29、h the valve can perform a useful throttling function.TABLE 1 Pressure Ratings for Control ValvesType ofEnd ConnectionPressure RatingApplicable Documents forDimensional Details of EndConnectionsButt-welded ASME B16.34Class 150, 300, 400, 600,900, 1500, 2500, or 4500ASME B16.25Socket-welded ASME B16.3

30、4Class 150, 300, 400, 600,900, 1500, 2500, or 4500ASME B16.11Flanged ASME B16.34Class 150, 300, 400, 600,900, 1500, 2500ASME B16.5Flanged(cast iron valves only)ASME B16.1Class 125, 250ASME B16.1Flanged(bronze)ASME B16.24Class 150, and 300ASME B16.24Flanged-navy(bronze)MIL-F-20042Class 150, 250, 400M

31、IL-F-20042Threaded(tapered pipe thread)ASME B16.34Class 150, 300, 400, 600,900, 1500, or 2500ASME B1.20.1and ASME B16.11Union-endA,silver-brazedMIL-F-1183(O-ring type)400 lb/in.2MIL-F-1183(O-ring type)400 lb/in.2Union-end,Asilver-brazed803-13859461500 lb/in.2803-13859461500 lb/in.2Union-end,Asilver-

32、brazed803-13859433000 lb/in.2803-13859433000 lb/in.2Union-end,Abutt/socket weld803-13858846000 lb/in.2803-13858846000 lb/in.2Other, as specified as specified as specifiedAFor union inlet and outlet end connections, only the pertinent dimensions listedin the applicable documents (Military Specificati

33、on or NAVSEArequirements) shallapply. Unless otherwise specified in the ordering data Section 5, the tailpieces andthe union-nuts shall not be furnishedonly the thread-pieces shall be furnished. Iftailpieces and union-nuts are required, their materials of construction shall be inaccordance with the

34、applicable documents listed above and shall be specified inthe ordering data Section 5.F1985 99 (2011)23.1.19 travel indicatorthe moving pointer mechanicallyattached to the valve stem and working in conjunction with afixed indicator scale attached to the yoke.3.1.20 three-way valvea three-way valve

35、has three endconnections configured for converging or diverging flow.3.1.21 valve body subassemblythe combination of valvebody, bonnet, end connections, and internal trim.3.1.22 yokethe intermediate piece between the valve bon-net and the actuator.3.2 Additional guidance on the control valve termino

36、logycan be found in ISA-S75.05.4. Classification4.1 Valves shall be of the following material grades, pres-sure ratings, types, seat leakage classes, flow characteristics,and sizes, as specified in Section 5.4.1.1 Material Grades (Applicable to Pressure ContainingParts Only):4.1.1.1 Grade AAlloy Ste

37、elMaterial Group 1.9 ofASME B16.34 (1 Cr-12 Mo, or 1-14 Cr-12 Mo).4.1.1.2 Grade BCarbon SteelMaterial Group 1.1 ofASME B16.34.4.1.1.3 Grace CCorrosion-Resistance Stainless SteelMaterial Group 2.2 of ASME B16.34 (18 Cr-8 Ni alloy).4.1.1.4 Grade DAs specified in the ordering information(see Section 5.

38、)4.2 Pressure RatingsValve shall have pressure ratingsselected from those listed in Table 1 and specified in Section 5.4.3 Types:4.3.1 Type 1Two-way valve, in-line (two end connec-tions).4.3.2 Type 2Two-way valve, angle (two end connections).4.3.3 Type 3Three-way valve, converging service (threeend

39、connectionstwo inlet and one outlet end connections).4.3.4 Type 4Three-way valve, diverging service (threeend connectionsone inlet and two outlet end connections).4.4 Seat Leakage Classes (Maximum Allowable SeatLeakage)Seat leakage class shall be selected from thoselisted in FCI 70-2 and specified i

40、n Section 5.4.5 Flow CharacteristicsThe inherent flow characteristicsof the valve shall be specified as quick-opening, linear-opening, equal-percentage opening, or as specified in Section5. (Additional guidance on valve flow characteristics can befound in ISA Handbook of Control Valves).4.6 End Conn

41、ectionsValve shall have end connectionsselected from those listed in Table 1 and specified in Section 5.4.7 SizesValve size shall be as specified in Section 5.5. Ordering Information5.1 Ordering documentation for valves under this specifica-tion shall include the following information, as required,

42、todescribe the equipment adequately:5.1.1 ASTM designation and year of issue,5.1.2 Material grade (see 4.1 and Table 1),5.1.3 Pressure rating (see 4.2),5.1.4 Pressure drop (Dp), kPa (psi),5.1.5 Type (see 4.3),5.1.6 Seat leakage class (see 4.4),5.1.7 Flow characteristics (see 4.5),5.1.8 End connectio

43、ns (see 4.6),5.1.9 Size, inlet, and outlet (see 4.7),5.1.10 Rangeability (see 7.2),5.1.11 Line medium (see 6.2),5.1.12 Operating pressures of the line media (minimum,normal, and maximum) (see 6.16),5.1.13 Inlet temperature of the line media (minimum, nor-mal, and maximum) (see 6.16),5.1.14 Flow rate

44、 required (minimum, normal, and maxi-mum) (see 7.1),5.1.15 Replaceable seat ring requirement (see 6.13),5.1.16 Minimum available air supply pressure to the actua-tor (see 6.16),5.1.17 Minimum and maximum actuator control signalpressure, kPa (psi) (benchset of the actuator),5.1.18 When manual overrid

45、e feature is required, itslocationtop or side-mounted (see 6.14.3),5.1.19 Valve fail-position required upon loss of air supply tothe actuator (see 6.14.4)5.1.20 Instrumentation requirements (see 6.15),5.1.21 Supplementary requirements, if any (see Supplemen-tary Requirements, S1, S2, or S3).6. Valve

46、 Construction6.1 Valves shall incorporate the design features specifiedbelow:6.1.1 General Requirements:6.1.1.1 Design shall permit adjustment without requiringremoval of the valve body from the line.6.2 Materials of ConstructionMaterials for pressure-containing parts shall be in accordance with the

47、 applicabledocuments listed in Table 1 (see 4.1). Materials for internalparts shall be compatible with the line media specified inSection 5.6.3 Pressure EnvelopeThe control valve shall be designedto pass a hydrostatic shell test at pressure(s) of at least 1.5times the 38C (100F) pressure rating(s) o

48、f the valve withoutdamage.6.4 JointsThe bonnet and bottom cover/flange shall beattached to the body using bolted flanges, a threaded connec-tion, or a threaded-union connection.6.5 Valve SpringsAny spring incorporated in the controlvalve shall not be compressed solid during operation. Springends sha

49、ll be squared and ground.6.6 ThreadsThreads shall be as specified in ASME B1.1.Where necessary, provisions shall be incorporated to preventthe accidental loosening of threaded parts. The design shall besuch that standard wrenches can be used on all external bolting.Lock-wire shall not be used. Any exposed threads shall beprotected by plastic caps for shipping.6.7 InterchangeabilityThe control valve, including allassociated piece parts, shall have part number identity and shallbe replaceable from stock by the manufacture