ASTM F1794-97(2010)
(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-pound units are to be regarded as the standard. The SI equivalents 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
Designation:F1794 −97(Reapproved 2010) An American National Standard
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-S-901 Shock Tests, H.I. (High-Impact); Shipboard
Machinery, Equipment and Systems, Requirements for
1.1 This specification covers the design, construction,
MIL-F-1183 Fittings, Pipe, Cast Bronze, Silver-Brazing,
testing, and operating requirements for hand-operated, quick-
General Specification for
change cartridge trim, in-line body and angle-body, globe-style
2.4 Government Drawings:
valves for use in gas (except oxygen gas) and hydraulic
Naval Sea Systems Command (NAVSEA):
systems.These valves may be used for on-off, and/or throttling
NAVSEA 803-1385884 Unions, Fittings and Adapters Butt
applications.
and Socket Welding 6000 PSI, WOG, NPS
1.2 The values stated in this specification in inch-pound
NAVSEA 803-1385943 Unions, Silver Brazing 3000 PSI,
units are to be regarded as the standard. The SI equivalents
WOG, NPS, for UT Inspection
shown in parenthesis are provided for information only.
NAVSEA 803-1385946 Unions, Bronze Silver Brazing,
WOG for UT Inspection
2. Referenced Documents
3. Terminology
2.1 ASTM Standards:
F992 Specification for Valve Label Plates
3.1 Definitions:
3.1.1 bubble-tight—no visible leakage over a 3-min period
2.2 American National Standards Institute (ANSI):
usingeitherwatersubmersionortheapplicationofbubblefluid
ANSI B1.1 Unified Screw Threads (UN and UNR Thread
for detection.
Form)
ANSI B1.20.1 Pipe Threads, General Purpose (Inch)
3.1.2 external leakage—leakage from the valve that escapes
ANSI B16.11 Forged Steel Fittings, Socket-Welding and
to atmosphere.
Threaded
3.1.3 flowcapacity—theabilityofavalvetopassflowunder
ANSI B16.25 Buttwelding Ends
any given set of pressure conditions. The flow capacity of a
ANSI B16.34 Valves—Flanged, Threaded, and Welded End
valve is directly related to its Flow Coefficient (C ). The Flow
v
2.3 Military Standards and Specifications:
coefficient is the quantity of water passing through a valve,
MIL-STD-167-1 Mechanical Vibrations of Shipboard
expressed in gallons/minute (litres/minute), when 1 psi (6.895
Equipment (Type I—Environmental and Type II—
kPa) pressure drop at 60°F (16°C) is applied across the valve.
Internally Excited)
3.1.4 globe-style valves—a basic control valve type that gets
MIL-STD-740-1 Airborne Noise Measurements and Accep-
its name from the globular shape of its body with an internal
tance Criteria of Shipboard Equipment
bridgewall construction. It normally uses a basic rising 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.
Current edition approved May 1, 2010. Published June 2010. Originally
shell test pressure, but the valve must meet all performance
approved in 1997. Last previous edition approved in 2004 as F1794 - 97 (2004).
requirements after the shell test pressure has been removed.
DOI: 10.1520/F1794-97R10.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 3.1.6 internal leakage—leakage from higher pressure to
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
lower pressure portions of the valve.
Standards volume information, refer to the standard’s Document Summary page on
3.1.7 operating pressures—the pressures within the valve
the ASTM website.
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
during service.
4th Floor, New York, NY 10036, http://www.ansi.org.
3.1.8 pressure ratings—the pressure ratings of the valve
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. shall be as defined in the documents listed in Table 1. The
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1794−97 (2010)
TABLE 1 End Connections and Pressure Ratings for Valves
5.1.1 ASTM designation and year of issue,
Applicable Documents for 5.1.2 Valve type (see 4.1.1),
Type of End
Pressure Rating Dimensional Details of End
5.1.3 Valve style (see 4.1.2),
Connection
Connections
5.1.4 Valve size (see 4.1.3),
Butt-welded ANSI B16.34 Class 150, ANSI B16.25
5.1.5 Valve pressure rating (see 4.1.4),
300, 400, 600, 900, 1500,
2500, or 4500
5.1.6 Valve end connections (see 4.1.5),
Socket-welded ANSI B16.34 Class 150, ANSI B16.11
5.1.7 Line medium,
300, 400, 600, 900, 1500,
2500, or 4500 5.1.8 Temperature of line medium,
Threaded (tapered ANSI B16.34 Class 150, ANSI B1.20.1 and ANSI
5.1.9 Supplementary requirements, if any (see S1 through
pipe thread) 300, 400, 600, 900, 1500, B16.11
S4),
or 2500
A
Union-end, MIL-F-1183 (O-ring type) MIL-F-1183 (O-ring type) 400
5.1.10 Maximum vibration frequency and displacement
Silver-brazed
400 lb/in. (2.758 MPa) lb/in. (2.758 MPa)
amplitude, if other than specified (see S1.4), and
A 2 2
Union-end, 803-1385946 1500 lb/in. 803-1385946 1500 lb/in.
Silver-brazed 5.1.11 Maximum permissible noise level, if other than
(10.342 MPa) (10.342 MPa)
A 2 2
Union-end, 803-1385943 3000 lb/in. 803-1385943 3000 lb/in.
specified (see S1.5).
Silver-brazed
(20.684 MPa) (20.684 MPa)
A 2 2
Union-end, 803-1385884 6000 lb/in. 803-1385884 6000 lb/in.
Butt/socket weld
6. Valve Construction
(41.369 MPa) (41.369 MPa)
Other, as specified As specified As specified
6.1 Valves shall incorporate the design features specified in
A
For union inlet and outlet end connections, only the pertinent dimensions listed
6.1.1 – 6.1.17.
in the applicable documents (Military Specification or NAVSEA Requirements)
shall apply. The valve shall be supplied with the thread-pieces only, without the 6.1.1 General Requirements:
tail-pieces and union-nuts.
6.1.1.1 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.
pressure ratings (also called pressure-temperature ratings)
6.1.2 Materials of Construction—Material requirements for
establish the maximum allowable working (service) pressures
these valves shall be as follows: The pressure containing
of a component (valve, end connections, and so forth) at
envelope shall be 300 series corrosion-resistant steel, nickel-
various temperatures.
copper (70-30), nickel-aluminum-bronze, or bronze. Internal
3.1.9 quick-change cartridge trim—a construction that fa-
parts in contact with the line media shall be 300 series
cilitates rapid and reliable seat-ring/seat removal and replace-
corrosion-resistant steel, nickel-copper (70-30), copper-nickel
ment by retaining the seat-ring/seat in the valve cartridge, as
(70-30), bronze, nickel-aluminum-bronze, or naval brass.
opposed to a seat-ring which is threaded, welded, brazed, or
Other materials not listed above may be selected to assure
made integral with the valve body.
compatibility with the line medium, weldability, and to provide
3.1.10 seat tightness—the ability of a valve to prevent corrosion resistance without requiring painting, coating, or
plating. Materials for contacting parts shall be selected to
internal leakage from the valve-inlet to the valve-outlet.
minimize electrolytic corrosion and galling.
4. Classification
6.1.3 Soft-Seating Insert—A soft-seating (non-metallic)
4.1 Valves shall be of the following types, styles, sizes, insert, if applicable, shall be field replaceable and incorporated
in the valve plug. Soft-seating inserts shall be protected from
pressureratings,andendconnections,asspecifiedinSection5.
4.1.1 Types—Valves shall have either Type I (angle body direct flow impingement, excessive loading and extrusion, or
any other effect jeopardizing their useful life. Soft-seating
construction) or Type II (inline body construction).
4.1.2 Styles—Valves shall be either Style I (shut-off valves) inserts shall be of the simplest practical configuration to
facilitate emergency replacement manufacture where neces-
or Style 2 (throttling valves).
1 1
4.1.3 Sizes—Valve sizes shall be ⁄8 NPS (10.2 mm), ⁄4 NPS sary.
3 1 3
6.1.4 Pressure Envelope—The valve shall be designed to
(13.5 mm), ⁄8 NPS (17.2 mm), ⁄2 NPS (21.3 mm), ⁄4 NPS
1 1
(26.9 mm), 1 NPS (33.7 mm), 1 ⁄4 NPS (42.4 mm), 1 ⁄2 NPS pass a hydrostatic shell test at a pressure of at least 1.5 times
the 100 °F (38 °C) pressure rating of the valve without any
(48.3 mm), and 2 NPS (60.3 mm).
4.1.4 Pressure Ratings—Valves shall have a pressure rating damage.
6.1.5 Threads—Threads shall be as specified inANSI B1.1.
selected from those listed in Table 1 and specified in Section 5.
The inlet and outlet pressure ratings of the valve shall be Where necessary, provisions shall be incorporated to prevent
the accidental loosening of threaded parts. The design shall be
identical for any given valve.
4.1.5 End Connections—Valves shall have end connections suchthatstandardwrenchescanbeusedonallexternalbolting.
Lock-wire shall not be used. Any exposed threads shall be
selected from those listed in Table 1 and specified in Section 5.
The inlet and outlet end connections of the valve shall be protected by plastic caps for shipping.
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
5. Ordering Information
valve body from the line.
5.1 Ordering documentation for valves under this specifica- 6.1.7 Interchangeability—The valve, including all associ-
tion shall include the following information, as required to ated piece parts, shall have part number identity, and shall be
describe the equipment adequately. replaceable from stock or the manufacturer on a nonselective
F1794−97 (2010)
and random basis. Parts having the same manufacturer’s part
number shall be directly interchangeable with each other with
respect to installation (physical) and performance (function).
Physically interchangeable assemblies, components, and parts
are those which are capable of being readily installed,
removed, or replaced without alteration, misalignment, or
damage 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 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—There shall be no adjustments required
FIG. 1Angle Body
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
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
FIG. 2Inline Body
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
7.1.2 SeatTightness—Valveshallbebubbletightat1.1times
(angle body construction) or Fig. 2 (inline body construction),
the 100 °F (38 °C) pressure rating in both directions when
as applicable, and Table 2.
closed with a handwheel/handle force not exceeding that
specified in 6.1.14 (or the manufacturer’s published
7. Performance
recommendations, when less).
7.1.3 External Leakage—Valve external leakage shall be
7.1 Valves shall meet the performance requirements of 7.1.1
bubbletight at its 100 °F (38 °C) pressure rating.
– 7.1.3.
7.1.1 Flow Capacity—The flow capacity of the valve, ex-
8. Tests Required
pressed in terms of C shall be equal or greater than the values
v
shown in Table 3. 8.1 Each valve shall pass the tests outlined in 8.1.1 – 8.1.4.
F1794−97 (2010)
TABLE 2 Envelope Dimensions (for Union-End Valves Only)
leakage over a 3-min period. The valve shall be tested in both
Envelope Dimensions, ±0.015 in. (±0.38 mm) directions of flow to assure bidirectional seat tightness. For
Valve Size, NPS
Dim. A Dim. B Dim. C
valves used for helium or helium mixture service, the testing
1 1 3
⁄8 (10.2 mm) 2.750 (69.85) 1 ⁄8 (28.59) 1 ⁄8 (34.92)
medium shall be helium or helium/nitrogen mixture.
1 1 11
⁄4 (13.5 mm) 3.375 (85.73) 1 ⁄2 (38.10) 1 ⁄16 (42.86)
3 5
⁄8 (17.2 mm) 4.000 (101.60) 1 ⁄8 (41.28) 2 (50.40) 8.1.4 External Leakage Test—With the valve in the partially
1 3 1
⁄2 (21.3 mm) 4.250 (107.95) 1 ⁄4 (44.45) 2 ⁄8 (53.98)
open position, air or nitrogen shall be applied at a test pressure
3 3 5
⁄4 (26.9 mm) 4.625 (117.75) 2 ⁄8 (60.33) 2 ⁄16 (59.05)
equal to the 100 °F (38 °C) pressure rating of the valv
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