ASTM F1565-00(2006)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:F1565 −00(Reapproved 2006) An American National Standard
Standard Specification for
Pressure-Reducing Valves for Steam Service
This standard is issued under the fixed designation F1565; 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 2.2 American Society of Mechanical Engineers (ASME)
Standards:
1.1 This specification covers self-contained, internally
B1.1 Unified Screw Threads
operated,globestyle,pressure-reducingvalvesforuseinsteam
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 Square and Hex bolts and Screws, 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:
FED-STD-H 28 Screw-Thread Standards for Federal Ser-
2. Referenced Documents
vices
2.1 ASTM Standards:
2.4 Military Standards and Specifications:
A105/A105M Specification for Carbon Steel Forgings for
MIL-V-3 Valves, Fittings, and Flanges (Except for Systems
Piping Applications
Indicated Herein); Packaging of
A182/A182M Specification for Forged or Rolled Alloy and
MIL-S-901 Shock Tests, H.I. (High Impact); Shipboard
Stainless Steel Pipe Flanges, Forged Fittings, and Valves
Machinery, Equipment and Systems, Requirements for
and Parts for High-Temperature Service
MIL-R-2765 Rubber Sheet Strip, Extruded, and Molded
A193/A193M Specification for Alloy-Steel and Stainless
Shapes, Synthetic, Oil Resistant
Steel Bolting for High Temperature or High Pressure
MIL-P-15024 Plates, Tags and Bands for Identification of
Service and Other Special Purpose Applications
Equipment
A194/A194M Specification for Carbon andAlloy Steel Nuts
MIL-P-15024/5 Plates, Identification
for Bolts for High Pressure or High Temperature Service,
MIL-R-17131 Rods and Powders, Welding, Surfacing
or Both
MIL-G-24716 Gaskets, Metallic-Flexible Graphite, Spiral
A216/A216M SpecificationforSteelCastings,Carbon,Suit-
Wound
able for Fusion Welding, for High-Temperature Service
MIL-I-45208 Inspection Systems Requirements
A217/A217M Specification for Steel Castings, Martensitic
MIL-STD-167-1 Mechanical Vibrations of Shipboard
Stainless and Alloy, for Pressure-Containing Parts, Suit-
Equipment (Type I—Environmental and Type II—
able for High-Temperature Service
Internally Excited)
A515/A515M Specification for Pressure Vessel Plates, Car-
NAVSEA T9074–AQ-GIB-010/271 Nondestructive Testing
bon Steel, for Intermediate- and Higher-Temperature Ser-
Requirements for Metals
vice
NAVSEAS9074–AR-GIB-010/278 FabricationWeldingand
A516/A516M Specification for Pressure Vessel Plates, Car-
Inspections and Casting Inspection and Repair for
bon Steel, for Moderate- and Lower-Temperature Service
Machinery, Piping and Pressure Vessels in Ships of the
A547 Specification for Steel Wire, Alloy, Cold-Heading
United States Navy
Quality, for Hexagon-Head Bolts
MIL-STD-798 Nondestructive Testing, Welding, Quality
Control, Material Control and Identification and Hi-Shock
Test Requirements for Piping System Components for
Naval Shipboard Use
This specification is under the jurisdiction of ASTM Committee F25 on Ships
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
MS 16142 Boss, Gasket Seal Straight Thread Tube Fitting,
Machinery and Piping Systems.
Standard Dimensions for
Current edition approved May 1, 2006. Published May 2006. Originally
approved in 1994. Last previous edition approved in 2000 as F1565 – 00. DOI:
10.1520/F1565-00R06.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from American Society of Mechanical Engineers (ASME), ASME
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM International Headquarters, Three Park Ave., New York, NY 10016-5990.
Standards volume information, refer to the standard’s Document Summary page on AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
the ASTM website. 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
F1565−00 (2006)
3. Terminology
3.1 accuracy of regulation—theamountbywhichthedown-
stream 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. 1Pressure-Reducing Valve (External Pressure Sensing)
4. Classification
4.1 Valves shall be of the following compositions and
pressure ratings, as specified (see Section 5 and 6.1.7). The 5.1.5 Whether internal or external reduced pressure sensing
line is required (see 6.1.2.1).
pressure-temperatureratingsshownbelowareapplicabletothe
pressure-containing components of the valve. See Fig. 1 and 5.1.6 Accuracy of regulation required if other than listed in
7.2.
Fig. 2.
1 1
4.1.1 Composition B—1 ⁄4 % chromium, ⁄2 % molybde- 5.1.7 Minimum and maximum inlet steam pressures (psig)
(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.
F1565−00 (2006)
TABLE 1 List of Material
Name of Parts Composition B Composition D
Body, bonnet, and ASTM A182/A182M, ASTM A105/A105M,
A
bottom cover Grade F11 ASTM A216/A216M,
ASTM A217/A217M, Grade WCB, ASTM
Grade WC6 A515/A515M,
A516/A516M,
A547
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 A193/A193M, ASTM A193/A193M,
Grade B16 Grade B7
ASTM A194/A194M, ASTM A194/A194M,
Grade 2H Grade 2H
A
Ifdesiredbythemanufacturer,thehighergradeboltingmaterialsmaybeused
inlowertemperaturecategories(forexample,SpecificationA194/A194M,Grade4
may be used for Composition B, and so forth) and also higher grade body
materials for Composition B and D valves (for example, Specification A182/
A182M, Grade F22 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) Mainvalvetrimmaterials.Mainvalvetrim(definedasconsistingoftheseat
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.
do not imply design.
(2) Pilot valve trim materials. Pilot valve trim (defined as consisting of the seat,
FIG. 2Pressure-Reducing Valve (Internal Pressure Sensing)
valve, and guiding surfaces) shall be made from one or a combination of the
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
6.1.2.1 Valves will be operated, maintained, and repaired on 600°F, either Inconel X-750 orA-286 alloy steel shall be used. Where the working
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
line. Valves shall be of the self-contained, internal-operated
type as described in 1.1. pressure. A return spring shall keep the pilot valve in contact
6.1.2.2 The operating piston shall be separate from the main with the diaphragm at all times.The diaphragm shall not travel
valve and fitted with one or more piston rings.The design shall throughcenterduringanyphaseofoperation.Edgescontacting
prevent water buildup on the piston. The piston shall operate the diaphragm shall be rounded to prevent wear and damage.
within a separate hardened steel cylinder liner located in the Condensate chamber or other suitable means shall be provided
valve body so that removal of the valve bonnet provides access to preclude internal wetted springs from being exposed to
to the top of the piston assembly. The cylinder liner shall be temperatures exceeding their material limitations. The reduced
held in place by way of the bonnet bolting or shall be pressure sensing line shall be internal or external as specified
permanently fabricated into the body. The requirement to (see 5.1).
locate the cylinder liner in the body may be waived where it is 6.1.3 Maintainability—Internal parts shall permit easy dis-
shown that an alternative location provides a satisfactory assemblyandreassemblywithstandardtoolsandshallprevent,
maintenance configuration. Pilot valve and diaphragm cham- as far as practical, the incorrect reassembly of parts. Position-
bers shall be self-draining. The pilot valve shall be single ing and alignment of all parts in assembly shall use positive
seated with integral stem. The valve shall be controlled by a means so that correct reassembly is repeatedly assured. Parts
spring-referenced metal diaphragm and shall open against high for a given valve shall not be physically interchangeable or
F1565−00 (2006)
reversible, unless such parts are also interchangeable or revers- assure parallel alignment of the guide bushings. Sufficient
ible with regard to function, performance, and strength. Valve bolting area shall be provided to maintain metal-to-metal
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
3 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
...