ASTM F1794-97(2004)
(Specification)Standard Specification for Hand-Operated, Globe-Style Valves for Gas (Except Oxygen Gas), and Hydraulic Systems
Standard Specification for Hand-Operated, Globe-Style Valves for Gas (Except Oxygen Gas), and Hydraulic Systems
ABSTRACT
This specification covers the design, construction, testing, and operating requirements for hand operated, quick-change cartridge trim, in-line body and angle-body, globe-style valves for use in gas (except oxygen gas) and hydraulic systems. These valves may be used for on-off, and/or throttling applications. Valves under this specification shall be Type I or Type II; Style I or Style II; and shall have the specified size, pressure rating, and end connections. Valves furnished under this specification shall be soft-seated, globe-style valves using a cartridge in which all working parts including the seat are removable as an assembly. The pressure containing envelope shall be made of corrosion-resistant steel, nickel-copper, nickel-aluminum-bronze, or bronze. Internal parts in contact with the line media shall be made of corrosion-resistant steel, nickel-copper, copper-nickel, bronze, nickel-aluminum bronze, or naval brass. Valve construction requirements for the following are detailed: (1) soft-seating insert, (2) pressure envelope, (3) threads, (4) accessibility, (5) nonmetallic element interchangeability, (6) maintainability, (7) reversibility, (8) adjustments, (9) bidirectional operation and bubbletight shut off, (10) guiding, (11) valve operating force, (12) pressurizing rate, (13) operation, and (14) envelope dimensions. Valves shall meet the performance requirements of flow capacity, seat tightness, and external leakage. Each valve shall pass the following tests: visual examination, hydrostatic shell test, seat tightness test, and external leakage test. The envelope dimensions for angle body and inline body construction are illustrated.
SCOPE
1.1 This specification covers the design, construction, testing, and operating requirements for hand operated, quick-change cartridge trim, in-line body and angle-body, globe style valves for use in gas (except oxygen gas), and hydraulic systems. These valves may be used for on-off, and/or throttling applications.
1.2 The values stated in this specification in inch-pounds units are to be regarded as the standard. The SI equivalent shown in parenthesis are provided for information only.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation: F1794 – 97 (Reapproved 2004)
Standard Specification for
Hand-Operated, Globe-Style Valves for Gas (Except Oxygen
Gas) and Hydraulic Systems
This standard is issued under the fixed designation F1794; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope MIL-F-1183 Fittings, Pipe, Cast Bronze, Silver-Brazing,
General Specification for
1.1 This specification covers the design, construction, test-
2.4 Government Drawings:
ing, and operating requirements for hand-operated, quick-
Naval Sea Systems Command (NAVSEA):
change cartridge trim, in-line body and angle-body, globe-style
NAVSEA 803-1385884 Unions, Fittings and Adapters Butt
valves for use in gas (except oxygen gas) and hydraulic
and Socket Welding 6000 PSI, WOG, NPS
systems.These valves may be used for on-off, and/or throttling
NAVSEA 803-1385943 Unions, Silver Brazing 3000 PSI,
applications.
WOG, NPS, for UT Inspection
1.2 The values stated in this specification in inch-pound
NAVSEA 803-1385946 Unions, Bronze Silver Brazing,
units are to be regarded as the standard. The SI equivalents
WOG for UT Inspection
shown in parenthesis are provided for information only.
3. Terminology
2. Referenced Documents
3.1 Definitions:
2.1 ASTM Standards:
3.1.1 bubble-tight—no visible leakage over a 3-min period
F992 Specification for Valve Label Plates
usingeitherwatersubmersionortheapplicationofbubblefluid
2.2 American National Standards Institute (ANSI):
for detection.
B1.1 Unified Screw Threads (UN and UNR Thread Form)
3.1.2 external leakage—leakage from the valve that escapes
B1.20.1 Pipe Threads, General Purpose (Inch)
to atmosphere.
B16.11 ForgedSteelFittings,Socket-WeldingandThreaded
3.1.3 flow capacity—the ability of a valve to pass flow
B16.25 Buttwelding Ends
under any given set of pressure conditions. The flow capacity
B16.34 Valves—Flanged, Threaded, and Welded End
of a valve is directly related to its Flow Coefficient (C ). The
v
2.3 Military Standards and Specifications:
Flow coefficient is the quantity of water passing through a
MIL-STD-167-1 Mechanical Vibrations of Shipboard
valve, expressed in gallons/minute (litres/minute), when 1 psi
Equipment (Type I—Environmental and Type II—
(6.895 kPa) pressure drop at 60°F (16°C) is applied across the
Internally Excited)
valve.
MIL-STD-740-1 Airborne Noise Measurements andAccep-
3.1.4 globe-style valves—a basic control valve type that
tance Criteria of Shipboard Equipment
gets its name from the globular shape of its body with an
MIL-S-901 Shock Tests, H.I. (High-Impact); Shipboard
internal bridgewall construction. It normally uses a basic rising
Machinery, Equipment and Systems, Requirements for
stem/plug for the closure member.
3.1.5 hydrostatic shell test pressures—the hydrostatic test
This specification is under the jurisdiction of ASTM Committee F25 on Ships
pressures that the valve is required to withstand without
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
damage. Valve operation is not required during application of
Machinery and Piping Systems.
shell test pressure, but the valve must meet all performance
Current edition approved May 1, 2004. Published May 2004. Originally
approved in 1997. Last previous edition approved in 1997 as F1794 - 97. DOI: requirements after the shell test pressure has been removed.
10.1520/F1794-97R04.
3.1.6 internal leakage—leakage from higher pressure to
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
lower pressure portions of the valve.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.1.7 operating pressures—the pressures within the valve
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
during service.
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
3.1.8 pressure ratings—the pressure ratings of the valve
4th Floor, New York, NY 10036.
shall be as defined in the documents listed in Table 1. The
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. pressure ratings (also called pressure-temperature ratings)
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F1794 – 97 (2004)
TABLE 1 End Connections and Pressure Ratings for Valves
5.1.3 Valve style (see 4.1.2),
Applicable Documents for 5.1.4 Valve size (see 4.1.3),
Type of End
Pressure Rating Dimensional Details of End
5.1.5 Valve pressure rating (see 4.1.4),
Connection
Connections
5.1.6 Valve end connections (see 4.1.5),
Butt-welded ANSI B16.34 Class 150, ANSI B16.25
5.1.7 Line medium,
300, 400, 600, 900, 1500,
5.1.8 Temperature of line medium,
2500, or 4500
Socket-welded ANSI B16.34 Class 150, ANSI B16.11
5.1.9 Supplementary requirements, if any (see S1 through
300, 400, 600, 900, 1500,
S4),
2500, or 4500
5.1.10 Maximum vibration frequency and displacement am-
Threaded (tapered ANSI B16.34 Class 150, ANSI B1.20.1 and ANSI
pipe thread) 300, 400, 600, 900, 1500, B16.11
plitude, if other than specified (see S1.4), and
or 2500
5.1.11 Maximum permissible noise level, if other than
A
Union-end, MIL-F-1183 (O-ring type) MIL-F-1183 (O-ring type)
2 2
Silver-brazed 400 lb/in. (2.758 MPa) 400 lb/in. (2.758 MPa) specified (see S1.5).
A 2 2
Union-end, 803-1385946 1500 lb/in. 803-1385946 1500 lb/in.
Silver-brazed (10.342 MPa) (10.342 MPa)
6. Valve Construction
A 2 2
Union-end, 803-1385943 3000 lb/in. 803-1385943 3000 lb/in.
6.1 Valves shall incorporate the design features specified in
Silver-brazed (20.684 MPa) (20.684 MPa)
A 2 2
Union-end, 803-1385884 6000 lb/in. 803-1385884 6000 lb/in.
6.1.1-6.1.17.
Butt/socket weld (41.369 MPa) (41.369 MPa)
6.1.1 General Requirements:
Other, as specified As specified As specified
6.1.1.1 Valves furnished under this specification shall be
A
Forunioninletandoutletendconnections,onlythepertinentdimensionslisted
soft-seated, globe-style valves using a cartridge in which all
in the applicable documents (Military Specification or NAVSEA Requirements)
shall apply. The valve shall be supplied with the thread-pieces only, without the
working parts including the seat are removable as an assembly.
tail-pieces and union-nuts.
6.1.2 Materials of Construction—Material requirements for
these valves shall be as follows: The pressure containing
establish the maximum allowable working (service) pressures envelope shall be 300 series corrosion-resistant steel, nickel-
of a component (valve, end connections, and so forth) at
copper (70-30), nickel-aluminum-bronze, or bronze. Internal
various temperatures. parts in contact with the line media shall be 300 series
3.1.9 quick-change cartridge trim—a construction that fa-
corrosion-resistant steel, nickel-copper (70-30), copper-nickel
cilitates rapid and reliable seat-ring/seat removal and replace- (70-30), bronze, nickel-aluminum-bronze, or naval brass.
ment by retaining the seat-ring/seat in the valve cartridge, as Other materials not listed above may be selected to assure
opposed to a seat-ring which is threaded, welded, brazed, or compatibility with the line medium, weldability, and to provide
made integral with the valve body. corrosion resistance without requiring painting, coating, or
3.1.10 seat tightness—the ability of a valve to prevent plating. Materials for contacting parts shall be selected to
internal leakage from the valve-inlet to the valve-outlet. minimize electrolytic corrosion and galling.
6.1.3 Soft-Seating Insert—A soft-seating (non-metallic) in-
4. Classification
sert,ifapplicable,shallbefieldreplaceableandincorporatedin
4.1 Valves shall be of the following types, styles, sizes, the valve plug. Soft-seating inserts shall be protected from
pressureratings,andendconnections,asspecifiedinSection5. direct flow impingement, excessive loading and extrusion, or
4.1.1 Types—Valves shall have either Type I (angle body any other effect jeopardizing their useful life. Soft-seating
construction) or Type II (inline body construction). inserts shall be of the simplest practical configuration to
4.1.2 Styles—Valves shall be either Style I (shut-off valves) facilitate emergency replacement manufacture where neces-
or Style 2 (throttling valves). sary.
1 1
4.1.3 Sizes—Valvesizesshallbe ⁄8NPS(10.2mm), ⁄4NPS 6.1.4 Pressure Envelope—The valve shall be designed to
3 1 3
(13.5 mm), ⁄8 NPS (17.2 mm), ⁄2 NPS (21.3 mm), ⁄4 NPS pass a hydrostatic shell test at a pressure of at least 1.5 times
1 1
(26.9 mm), 1 NPS (33.7 mm), 1 ⁄4 NPS (42.4 mm), 1 ⁄2 NPS the 100°F (38°C) pressure rating of the valve without any
(48.3 mm), and 2 NPS (60.3 mm). damage.
4.1.4 Pressure Ratings—Valves shall have a pressure rating
6.1.5 Threads—Threads shall be as specified inANSI B1.1.
selected from those listed inTable 1 and specified in Section 5. Where necessary, provisions shall be incorporated to prevent
The inlet and outlet pressure ratings of the valve shall be the accidental loosening of threaded parts. The design shall be
identical for any given valve. suchthatstandardwrenchescanbeusedonallexternalbolting.
4.1.5 End Connections—Valves shall have end connections Lock-wire shall not be used. Any exposed threads shall be
selected from those listed inTable 1 and specified in Section 5. protected by plastic caps for shipping.
The inlet and outlet end connections of the valve shall be 6.1.6 Accessibility—All internal parts of the valve shall be
identical for any given valve. accessible for adjustment or service, without removing the
valve body from the line.
5. Ordering Information
6.1.7 Interchangeability—The valve, including all associ-
5.1 Ordering documentation for valves under this specifica- ated piece parts, shall have part number identity, and shall be
tion shall include the following information, as required to replaceable from stock or the manufacturer on a nonselective
describe the equipment adequately. and random basis. Parts having the same manufacturer’s part
5.1.1 ASTM designation and year of issue, number shall be directly interchangeable with each other with
5.1.2 Valve type (see 4.1.1), respect to installation (physical) and performance (function).
F1794 – 97 (2004)
Physically interchangeable assemblies, components, and parts
are those which are capable of being readily installed, re-
moved, or replaced without alteration, misalignment, or dam-
age to parts being installed or to adjoining parts. Fabrication
operations such as cutting, filing, drilling, reaming, hammer-
ing, bending, prying, or forcing shall not be required.
6.1.8 Nonmetallic Element Interchangeability—
Nonmetallic elements, including but not limited to, seat rings,
soft-seating inserts, cushions, and O-rings shall be treated as
separately identified and readily replaceable parts.
6.1.9 Maintainability—Valve maintenance shall require
standard tools to the maximum extent possible. Any special
tools required for maintenance shall be identified, and shall be
supplied with the valve.
6.1.10 Reversibility—Seat inserts shall not be physically
reversible unless they are also functionally reversible to
preclude incorrect assembly.
6.1.11 Adjustments—Thereshallbenoadjustmentsrequired
in the valve during or after assembly.
6.1.12 Bidirectional Operation and Bubbletight Shut-Off—
The valve shall be capable of operation and bubbletight
shut-off with a differential pressure equal to the rated pressure FIG. 1 Angle Body
applied across the valve in either direction of flow.
6.1.13 Guiding—The valve poppet shall be guided to pre-
vent binding or seizing, and to ensure proper seating, under all
operating conditions. Proper alignment of all internal operating
parts shall be maintained with interchangeable parts and under
all tolerance stack-up conditions.
6.1.14 Valve Operating Force—The maximum permissible
total tangential force required on the handwheel/handle for
operating or seating/unseating the valve shall not exceed 50 lb
(222 N), when the valve is subjected to a differential pressure
equal to the rated pressure applied across the valve in either
direction of flow.
6.1.15 Pressurization Rate—To prevent the possibility of
auto-ignition, the valve shall be capable of being operated to
limit 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 Operation—The valve shall close by a clockwise
rotation of handwheel/handle when viewed from directly over
the handwheel/handle.
6.1.17 Envelope Dimensions—For union-end valves only,
the overall envelope dimensions shall be as shown in Fig. 1
FIG. 2 Inline Body
(angle body construction) or Fig. 2 (inline body construction),
as applicable, and Table 2.
7.1.3 External Leakage—Valve external leakage shall be
7. Performance
bubbletight at its 100°F (38°C) pressure rating.
7.1 Valves shall meet the performance requirements of
8. Tests Required
7.1.1-7.1.3.
7.1.1 Flow Capacity—The flow capacity of the valve, 8.1 Each valve shall pass the tests outlined in 8.1.1-8.1.4.
expressed in terms of C shall be equal or greater than the 8.1.1 Visual Examination—The valve shall be examined
v
values shown in Table 3. visually to determine conformance with the ordering data and
7.1.2 Seat Tightness—Valve shall be bubbletight at 1.1 workmanship without disassembly.
times the 100°F (38°C) pressure rating in both directions when 8.1.2 Hydrostatic Shell Test—The valve shall be hydrostati-
closed with a handwheel/handle force not exceeding that cally tested with water by applying test pressures equal to 1.5
specified in 6.1.14 (or the manufacturer’s published recom- times the 100°F (38°C) pressure rating to the inlet and outlet
mendations, when less). ports (with the valve in the open position) to check the
F1794 – 97 (2004)
TABLE 2 Envelope Dimensions (for Union-End Valves Only)
valves used for helium or helium mixture service, the testing
Envelope Dimensions, 60.015 in. (60.38 mm) medium shall be helium or helium/nitrogen mixture.
Valve Size, NPS
8.1.4 External Leakage Test—With the valve in the partially
Dim. A Dim. B Dim. C
open position, air or nitrogen shall be applied at a test pressure
1 1 3
⁄8 (10.2 mm) 2.750 (69.85) 1 ⁄8 (28.59) 1 ⁄8 (34.92)
1 1 11
⁄4 (13.5 mm) 3.375 (85.73) 1 ⁄2 (38.10) 1 ⁄16 (42.86) equal to the 100°F (38°C) pressur
...
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