1、Designation: F1794 97 (Reapproved 2016)1An 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
2、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.1NOTEKeywords were added editorially in September 2016.1. Scope1
3、.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, or throttlingapplicat
4、ions, or both.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2F992 Specification for Valve
5、 Label Plates2.2 ANSI Standards: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
6、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 Syste
7、ms, Requirements forMIL-F-1183 Fittings, Pipe, Cast Bronze, Silver-Brazing,General Specification for2.4 Government Drawings:4Naval 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,
8、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
9、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/mi
10、nute (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 closu
11、re 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 re
12、moved.3.1.6 internal leakageleakage from higher pressure tolower pressure portions of the valve.1This 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 app
13、roved Sept. 1, 2016. Published September 2016. Originallyapproved in 1997. Last previous edition approved in 2010 as F1794 97 (2010).DOI: 10.1520/F1794-97R16E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book o
14、f 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,
15、700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.7 operating pressuresthe pressures within the valveduring service.3.1.8 pressure ratingsthe pressure ratings of the valvesha
16、ll be as defined in the documents listed in Table 1. Thepressure 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 t
17、hat 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 f
18、rom the valve-inlet to the valve-outlet.4. Classification4.1 Valves shall be of the following types, styles, sizes,pressure ratings, and end connections, as specified in Section 5.4.1.1 TypesValves shall have either Type I (angle bodyconstruction) or Type II (inline body construction).4.1.2 StylesVa
19、lves shall be either Style I (shut-off valves)or Style 2 (throttling valves).4.1.3 SizesValve sizes shall be18 NPS (10.2 mm),14 NPS(13.5 mm),38 NPS (17.2 mm),12 NPS (21.3 mm),34 NPS(26.9 mm), 1 NPS (33.7 mm), 114 NPS (42.4 mm), 112 NPS(48.3 mm), and 2 NPS (60.3 mm).4.1.4 Pressure RatingsValves shall
20、 have a pressure ratingselected from those listed in Table 1 and specified in Section 5.The inlet and outlet pressure ratings of the valve shall beidentical for any given valve.4.1.5 End ConnectionsValves shall have end connectionsselected from those listed in Table 1 and specified in Section 5.The
21、inlet and outlet end connections of the valve shall beidentical for any given valve.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
22、,5.1.2 Valve type (see 4.1.1),5.1.3 Valve style (see 4.1.2),5.1.4 Valve size (see 4.1.3),5.1.5 Valve pressure rating (see 4.1.4),5.1.6 Valve end connections (see 4.1.5),5.1.7 Line medium,5.1.8 Temperature of line medium,5.1.9 Supplementary requirements, if any (see S1 throughS4),5.1.10 Maximum vibra
23、tion frequency and displacementamplitude, if other than specified (see S1.4), and5.1.11 Maximum permissible noise level, if other thanspecified (see S1.5).6. Valve Construction6.1 Valves shall incorporate the design features specified in6.1.1 6.1.17.6.1.1 General Requirements:6.1.1.1 Valves furnishe
24、d under this specification shall besoft-seated, globe-style valves using a cartridge in which allworking parts including the seat are removable as an assembly.6.1.2 Materials of ConstructionMaterial requirements forthese valves shall be as follows: The pressure containingenvelope shall be 300 series
25、 corrosion-resistant steel, nickel-copper (70-30), nickel-aluminum-bronze, or bronze. Internalparts in contact with the line media shall be 300 seriescorrosion-resistant steel, nickel-copper (70-30), copper-nickel(70-30), bronze, nickel-aluminum-bronze, or naval brass.Other materials not listed abov
26、e may be selected to assurecompatibility with the line medium, weldability, and to providecorrosion resistance without requiring painting, coating, orplating. Materials for contacting parts shall be selected tominimize electrolytic corrosion and galling.6.1.3 Soft-Seating InsertA soft-seating (non-m
27、etallic)insert, if applicable, shall be field replaceable and incorporatedin the valve plug. Soft-seating inserts shall be protected fromdirect flow impingement, excessive loading and extrusion, orany other effect jeopardizing their useful life. Soft-seatinginserts shall be of the simplest practical
28、 configuration tofacilitate emergency replacement manufacture where neces-sary.6.1.4 Pressure EnvelopeThe valve shall be designed topass a hydrostatic shell test at a pressure of at least 1.5 timesthe 100F (38C) pressure rating of the valve without anydamage.6.1.5 ThreadsThreads shall be as specifie
29、d in ANSI 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.TA
30、BLE 1 End Connections and Pressure Ratings for ValvesType of EndConnectionPressure RatingApplicable Documents forDimensional Details of EndConnectionsButt-welded ANSI B16.34 Class 150,300, 400, 600, 900, 1500,2500, or 4500ANSI B16.25Socket-welded ANSI B16.34 Class 150,300, 400, 600, 900, 1500,2500,
31、or 4500ANSI B16.11Threaded (taperedpipe thread)ANSI B16.34 Class 150,300, 400, 600, 900, 1500,or 2500ANSI B1.20.1 and ANSIB16.11Union-end,ASilver-brazedMIL-F-1183 (O-ring type)400 lb/in.2(2.758 MPa)MIL-F-1183 (O-ring type) 400lb/in.2(2.758 MPa)Union-end,ASilver-brazed803-1385946 1500 lb/in.2(10.342
32、MPa)803-1385946 1500 lb/in.2(10.342 MPa)Union-end,ASilver-brazed803-1385943 3000 lb/in.2(20.684 MPa)803-1385943 3000 lb/in.2(20.684 MPa)Union-end,AButt/socket weld803-1385884 6000 lb/in.2(41.369 MPa)803-1385884 6000 lb/in.2(41.369 MPa)Other, as specified As specified As specifiedAFor union inlet and
33、 outlet end connections, only the pertinent dimensions listedin the applicable documents (Military Specification or NAVSEA Requirements)shall apply. The valve shall be supplied with the thread-pieces only, without thetail-pieces and union-nuts.F1794 97 (2016)126.1.6 AccessibilityAll internal parts o
34、f the valve shall beaccessible for adjustment or service, without removing thevalve body from the line.6.1.7 InterchangeabilityThe valve, including all associ-ated piece parts, shall have part number identity, and shall bereplaceable from stock or the manufacturer on a nonselectiveand random basis.
35、Parts having the same manufacturers partnumber shall be directly interchangeable with each other withrespect to installation (physical) and performance (function).Physically interchangeable assemblies, components, and partsare those which are capable of being readily installed,removed, or replaced w
36、ithout alteration, misalignment, ordamage to parts being installed or to adjoining parts. Fabrica-tion operations such as cutting, filing, drilling, reaming,hammering, bending, prying, or forcing shall not be required.6.1.8 Nonmetallic Element InterchangeabilityNonmetallic elements, including but no
37、t limited to, seat rings,soft-seating inserts, cushions, and O-rings shall be treated asseparately identified and readily replaceable parts.6.1.9 MaintainabilityValve maintenance shall requirestandard tools to the maximum extent possible. Any specialtools required for maintenance shall be identified
38、, and shall besupplied with the valve.6.1.10 ReversibilitySeat inserts shall not be physicallyreversible unless they are also functionally reversible topreclude incorrect assembly.6.1.11 AdjustmentsThere shall be no adjustments requiredin the valve during or after assembly.6.1.12 Bidirectional Opera
39、tion and Bubbletight Shut-OffThe valve shall be capable of operation and bubbletightshut-off with a differential pressure equal to the rated pressureapplied across the valve in either direction of flow.6.1.13 GuidingThe valve poppet shall be guided to pre-vent binding or seizing, and to ensure prope
40、r seating, under alloperating conditions. Proper alignment of all internal operatingparts shall be maintained with interchangeable parts and underall tolerance stack-up conditions.6.1.14 Valve Operating ForceThe maximum permissibletotal tangential force required on the handwheel/handle foroperating
41、or seating/unseating the valve shall not exceed 50 lb(222 N), when the valve is subjected to a differential pressureequal to the rated pressure applied across the valve in eitherdirection of flow.6.1.15 Pressurization RateTo prevent the possibility ofauto-ignition, the valve shall be capable of bein
42、g operated tolimit the rate of downstream pressure buildup in a depressur-ized volume (with the rated pressure upstream) to 200 psi(1380 kPa) per second. Downstream volumes for this pressur-ization rate shall be taken as 10 pipe diameters.6.1.16 OperationThe valve shall close by a clockwiserotation
43、of handwheel/handle when viewed from directly overthe handwheel/handle.6.1.17 Envelope DimensionsFor union-end valves only,the overall envelope dimensions shall be as shown in Fig. 1(angle body construction) or Fig. 2 (inline body construction),as applicable, and Table 2.7. Performance7.1 Valves sha
44、ll meet the performance requirements of 7.1.1 7.1.3.7.1.1 Flow CapacityThe flow capacity of the valve, ex-pressed in terms of Cvshall be equal or greater than the valuesshown in Table 3.7.1.2 Seat TightnessValve shall be bubbletight at 1.1 timesthe 100F (38C) pressure rating in both directions whenc
45、losed with a handwheel/handle force not exceeding thatspecified in 6.1.14 (or the manufacturers publishedrecommendations, when less).FIG. 1 Angle BodyFIG. 2 Inline BodyF1794 97 (2016)137.1.3 External LeakageValve external leakage shall bebubbletight at its 100F (38C) pressure rating.8. Tests Require
46、d8.1 Each valve shall pass the tests outlined in 8.1.1 8.1.4.8.1.1 Visual ExaminationThe valve shall be examinedvisually to determine conformance with the ordering data andworkmanship without disassembly.8.1.2 Hydrostatic Shell TestThe valve shall be hydrostati-cally tested with water by applying te
47、st pressures equal to 1.5times the 100F (38C) pressure rating to the inlet and outletports (with the valve in the open position) to check thestructural integrity of the valve. Pressure shall be applied forthree minutes. Air or nitrogen may be used in lieu of water,providing appropriate safety precau
48、tions are taken to minimizethe risk associated with the use of a compressible fluid. Thereshall be no external leakage, permanent distortion, or structuralfailure.8.1.3 Seat Tightness TestThe valve shall be seated with anapplied handwheel/handle force not exceeding that specified in6.1.14 (or the ma
49、nufacturers published recommendations,when less). Air or nitrogen at 1.1 times the 100F (38C)pressure rating of the valve shall be used for seat tightness test,using bubble fluid or immersing the outlet, or a line from theoutlet, under water. The valve shall show no visible evidence ofleakage over a 3-min period. The valve shall be tested in bothdirections of flow to assure bidirectional seat tightness. Forvalves used for helium or helium mixture service, the testingmedium shall be helium or helium/nitrogen m
