ASTM F1565-00
(Specification)Standard Specification for Pressure-Reducing Valves for Steam Service
Standard Specification for Pressure-Reducing Valves for Steam Service
SCOPE
1.1 This specification covers self-contained, internally operated, globe style, pressure-reducing valves for use in steam service. In these valves, the downstream pressure feedback is sensed by a spring-loaded diaphragm to position a pilot valve-the pilot valve utilizes the inlet steam pressure to position the main valve plug via an operating piston.
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An American National Standard
Designation: F 1565 – 00
Standard Specification for
Pressure-Reducing Valves for Steam Service
This standard is issued under the fixed designation F 1565; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 American Society of Mechanical Engineers (ASME)
Standards:
1.1 This specification covers self-contained, internally op-
B1.1 Unified Screw Threads
erated, globe style, pressure-reducing valves for use in steam
B16.5 Pipe Flanges and Flanged Fittings
service. In these valves, the downstream pressure feedback is
B16.34 Valves—Flanged, Threaded, and Welding End
sensed by a spring-loaded diaphragm to position a pilot
B18.2.1 SquareandHexboltsandScrews,IncludingAskew
valve—the pilot valve uses the inlet steam pressure to position
Head bolts, Hex Cap Screws, and Lag Screws
the main valve plug via an operating piston.
2.3 Federal Specification:
2. Referenced Documents
FED-STD-H 28 Screw-Thread Standards for Federal Ser-
vices
2.1 ASTM Standards:
2.4 Military Standards and Specifications:
A 105/A 105M Specification for Carbon Steel Forgings for
MIL-V-3 Valves, Fittings, and Flanges (Except for Systems
Piping Applications
Indicated Herein); Packaging of
A 182/A 182M Specification for Forged or Rolled Alloy-
MIL-S-901 Shock Tests, H.I. (High Impact); Shipboard
Steel Pipe Flanges, Forged Fittings, and Valves and Parts
Machinery, Equipment and Systems, Requirements for
for High-Temperature Service
MIL-R-2765 Rubber Sheet Strip, Extruded, and Molded
A 193/A 193M Specification for Alloy-Steel and Stainless
Shapes, Synthetic, Oil Resistant
Steel Bolting Materials for High-Temperature Service
MIL-P-15024 Plates, Tags and Bands for Identification of
A 194/A 194M Specification for Carbon and Alloy Steel
Equipment
Nuts for Bolts for High Pressure or High Temperature
MIL-P-15024/5 Plates, Identification
Service, or Both
MIL-R-17131 Rods and Powders, Welding, Surfacing
A 216/A 216M Specification for Steel Castings, Carbon,
MIL-G-24716 Gaskets, Metallic-Flexible Graphite, Spiral
Suitable for Fusion Welding, for High-Temperature Ser-
Wound
vice
MIL-I-45208 Inspection Systems Requirements
A 217/A 217M Specification for Steel Castings, Martensi-
MIL-STD-167-1 Mechanical Vibrations of Shipboard
tic Stainless and Alloy, for Pressure-Containing Parts,
Equipment (Type I—Environmental and Type II—
Suitable for High-Temperature Service
Internally Excited)
A 515/A 515M Specification for Pressure Vessel Plates,
NAVSEA T9074–AQ-GIB-010/271 Nondestructive Testing
Carbon Steel, for Intermediate-and Higher-Temperature
Requirements for Metals
Service
NAVSEA S9074–AR-GIB-010/278 Fabrication Welding
A 516/A 516M Specification for Pressure Vessel Plates,
and Inspections and Casting Inspection and Repair for
Carbon Steel, for Moderate- and Lower-Temperature Ser-
Machinery, Piping and Pressure Vessels in Ships of the
vice
United States Navy
A 547 Specification for Steel Wire, Alloy, Cold-Heading
MIL-STD-798 Nondestructive Testing, Welding, Quality
Quality, for Hexagon-Head Bolts
Control, Material Control and Identification and Hi-Shock
Test Requirements for Piping System Components for
This specification is under the jurisdiction of ASTM Committee F25 on Ships
Naval Shipboard Use
and MarineTechnology and is the direct responsibility of Subcommittee F25.11 on
Machinery and Piping Systems.
Current edition approved May 10, 2000. Published August 2000. Originally
published as F 1565 - 94. Last previous edition F 1565 - 94. Available from American Society of Mechanical Engineers, Headquarters,
Annual Book of ASTM Standards, Vol 01.01. Three Park Ave., New York, NY 10016–5990. (Telephone: 212–591–7722, Telex:
Annual Book of ASTM Standards, Vol 01.02. 710–591–5267, Fax: 212–591–7674)
4 7
Annual Book of ASTM Standards, Vol 01.04. AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Discontinued. See 1990 Annual Book of ASTM Standards, Vol 01.03. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F 1565 – 00
MS 16142 Boss, Gasket Seal Straight Thread Tube Fitting,
Standard Dimensions for
3. Terminology
3.1 accuracy of regulation—the amount by which the
downstream pressure may vary when the valve is set at any
pressure within the required set pressure limit and is subjected
to any combination of inlet pressure, flow demand, and
ambient temperature variations, within the specified limits.
3.2 design pressure and temperature— the maximum pres-
sure and temperature the valve should be subjected to under
any condition. These are the pressure and temperature upon
which the strength of the pressure-containing envelope is
based.
3.3 hydrostatic test pressure—the maximum test pressure
that the valve is required to withstand without damage. Valve
operation is not required during application of this test pres-
sure, but after the pressure has been removed, the valve must
meet all performance requirements.
3.4 lockup pressure—the outlet pressure delivered by a
pressure-reducing valve under shutoff conditions (that is, when
the flow demand is reduced to a point where it is equal to or
less than the allowable leakage as defined in 8.3).
3.5 nominal pressure—the approximate maximum pressure
to which the valve will be subjected in service under normal
conditions.
3.6 set pressure—the downstream pressure which the valve
issettomaintainunderagivensetofoperatingconditions(that
is, inlet pressure and flow). Ideally, the valve should be set at
downstream pressure approximately equal to the mid-point of
the set pressure limits (defined in 3.7).
3.7 set pressure limits (range of set pressure adjustment)—
The range of set pressure over which the valve can be adjusted
NOTE 1—Pictorial representations are for illustrative purpose only and
while meeting the specified performance requirements.
do not imply design.
FIG. 1 Pressure-Reducing Valve (External Pressure Sensing)
4. Classification
4.1 Valves shall be of the following compositions and
5.1.5 Whether internal or external reduced pressure sensing
pressure ratings, as specified (see Section 5 and 6.1.7). The
line is required (see 6.1.2.1).
pressure-temperature ratings shown below are applicable to the
5.1.6 Accuracy of regulation required if other than listed in
pressure-containing components of the valve. See Fig. 1 and
7.2.
Fig. 2.
5.1.7 Minimum and maximum inlet steam pressures (psig)
1 1
4.1.1 Composition B—1 ⁄4 % chromium, ⁄2 % molybde-
(see 7.3 and S1.5).
num [maximum temperature 1000°F (see 6.1.7)].
5.1.8 Maximum inlet steam temperature (°F) (see S1.5).
4.2 Composition D—carbon steel [maximum temperature
5.1.9 Range of set pressure adjustment for valves, if other
775°F (see 6.1.7)].
than listed in 7.4.
4.3 Pressure Ratings—These shall conform toASME Class
5.1.10 Maximum and minimum capacity required lb/hour.
150, Class 300, Class 600, or Class 1500.
5.1.11 Special tools, if required (see 6.1.15).
5.1.12 Supplementary requirements, if any (see S1 through
5. Ordering Information
S4).
5.1 Ordering documentation for valves under this specifica-
6. Valve Construction and Coding
tion shall include the following information, as required, to
describe the equipment adequately. 6.1 Valves shall incorporate the design features specified in
5.1.1 ASTM designation and year of issue. 6.1.1-6.1.14.
5.1.2 Valve specification code (see 6.1.14). 6.1.1 Materials of Construction—Materials shall be as
5.1.3 Composition and pressure rating required (see Section specified in Table 1. All materials shall be selected to prevent
4). corrosion, galling, seizing, and excessive wear or erosion
5.1.4 Trim materials where specific requirement is known where applicable. Clearances shall prevent interference as a
(see Table 1, Footnote B, Note 2). resultofthethermalexpansion.Cadmiumplatingisprohibited.
F 1565 – 00
TABLE 1 List of Material
Name of Parts Composition B Composition D
Body, bonnet, and ASTM A 182/A 182M, ASTM A 105/A 105M,
A
bottom cover Grade F 11 ASTM A 216/A 216M,
ASTM A 217/A 217M, Grade WCB, ASTM
Grade WC6 A 515/A 515M,
A 516/A 516M,
A 547
BB
Internal trim
Cylinder liner and piston 400 series CRES 400 series CRES
500 Brinell min hard 500 Brinell min hard
Gaskets MIL-G-24716, Class B MIL-G-24716, Class B
Diaphragm Ni-Cr alloy Ni-Cr alloy
300 series CRES 300 series CRES
CC
Springs
A
Bolting ASTM A 193/A 193M, ASTM A 193/A 193M,
Grade B16 Grade B7
ASTM A 194/A 194M, ASTM A 194/A 194M,
Grade 2H Grade 2H
A
Ifdesiredbythemanufacturer,thehighergradeboltingmaterialsmaybeused
in lower temperature categories (for example, SpecificationA 194/A 194M, Grade
4 may be used for Composition B, and so forth) and also higher grade body
materials for Composition B and D valves (for example, Specification A 182/
A 182M, Grade F 22 for Composition B, and so forth).
B
Trim materials—Unless otherwise specified (see 5.1), the valve manufacturer
shall select from the categories listed below the trim materials best suited to meet
the requirements.
(1) Main valve trim materials. Main valve trim (defined as consisting of the seat
orseatringandplugandtheguidepostsandbushings)materialsshallbeselected
from the following:
(a) Stellite—Trim to be Stellite.
(b) Hardened corrosion-resistant steel—Hardened corrosion-resistant steel
plug (400 series or 17-4 PH) and Stellite seat or seat ring. Guiding surfaces to be
hardened corrosion-resistant steel or Stellite.
Nongalling grades of materials shall be chosen to prevent galling between
rubbing surfaces. A difference in hardness of at least 100 points Brinell shall be
maintained between the rubbing guiding surfaces. This requirement does not
apply if both the guide surfaces are Stellited or if the hardness of either exceeds
450 Brinell.
(c) Where Stellite is used, it shall consist of either wrought Stellite 6B, cast
Stellite 6, or an inlay of Stellite (not less than ⁄32-in. thickness for main seat and
disk surfaces). Where inlays are used, welding rods shall be in accordance with
NOTE 1—Pictorial representations are for illustrative purpose only and
Type MIL-RCoCr-A or MIL-R-17131.
(2) Pilot valve trim materials. Pilot valve trim (defined as consisting of the seat,
do not imply design.
valve, and guiding surfaces) shall be made from one or a combination of the
FIG. 2 Pressure-Reducing Valve (Internal Pressure Sensing)
following materials:
(a) 400 series or 17-4PH corrosion-resistant steel-hardened.
(b) Stellite.
6.1.2 General Requirements: C
Spring materials—Where the working temperature of the spring will exceed
600°F, either Inconel X-750 orA-286 alloy steel shall be used. Where the working
6.1.2.1 Valves will be operated, maintained, and repaired on
temperature of the spring exceeds 450°F, but not 600°F, Inconel 600 or tungsten
board ships and shall emphasize simplicity, maintainability,
tool steel may also be used. Where the working temperature of the spring will not
ruggedness, and reliability. Design shall permit access for
exceed 450°F, 300 series corrosion-resistant steel may be used.
adjustment and repair when working from either side of the
valveandwithoutrequiringremovalofthevalvebodyfromthe
pressure. A return spring shall keep the pilot valve in contact
line. Valves shall be of the self-contained, internal-operated with the diaphragm at all times. The diaphragm shall not travel
type as described in 1.1.
throughcenterduringanyphaseofoperation.Edgescontacting
6.1.2.2 The operating piston shall be separate from the main the diaphragm shall be rounded to prevent wear and damage.
valve and fitted with one or more piston rings.The design shall
Condensate chamber or other suitable means shall be provided
prevent water buildup on the piston. The piston shall operate to preclude internal wetted springs from being exposed to
within a separate hardened steel cylinder liner located in the temperatures exceeding their material limitations. The reduced
valve body so that removal of the valve bonnet provides access pressure sensing line shall be internal or external as specified
to the top of the piston assembly. The cylinder liner shall be (see 5.1).
held in place by way of the bonnet bolting or shall be 6.1.3 Maintainability—Internal parts shall permit easy dis-
permanently fabricated into the body. The requirement to assemblyandreassemblywithstandardtoolsandshallprevent,
locate the cylinder liner in the body may be waived where it is as far as practical, the incorrect reassembly of parts. Position-
shown that an alternative location provides a satisfactory ing and alignment of all parts in assembly shall use positive
maintenance configuration. Pilot valve and diaphragm cham- means so that correct reassembly is repeatedly assured. Parts
bers shall be self-draining. The pilot valve shall be single for a given valve shall not be physically interchangeable or
seated with integral stem. The valve shall be controlled by a reversible, unless such parts are also interchangeable or revers-
spring-referenced metal diaphragm and shall open against high ible with regard to function, performance, and strength. Valve
F 1565 – 00
design shall permit accomplishment of the following mainte- make-up over at least a three-year period. Bearing surface of
nance actions within the time limits specified: nuts and their respective surfaces on the valve shall be finished
machined.
Action Time Allowed
6.1.10 Body Construction—Valve bodies shall be machined
Disassemble, replace pilot assembly, reassemble ⁄2 h
from a one-piece casting or forging and shall be of basic globe
Renew pilot valve assembly trim ⁄2 h
configurations with in-line inlet and outlet ports. Steam lines,
Renew main valve trim ⁄4 h
except for the external downstream pressure sensing line
6.1.4 Interchangeability—Valve design shall permit inter-
(where used), shall be internally ported in the body and bonnet.
changeability without individual modification of like parts
Body passages shall produce gradual changes in flow direction
between all valves. Each part shall have part number identity
so as to reduce any effects of concentrated impingement and
and shall be replaceable from stock or the manufacturer on a
90° turns. In portions of the valve subject to velocity increases
nonselective and random basis. With the exception of matched
and flow direction changes, such as immediately downstream
parts, parts having the same manufacturer’s par
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