ASTM F1508-96(2010)

Standard Specification for Angle Style, Pressure Relief Valves for Steam, Gas and Liquid Services

ABSTRACT
This specification covers spring-loaded, angle style, pressure relief valves for steam, gas, and liquid system applications. Pressure relief valves shall be of the following types and material grades: Type I, Grades A and B; Type II, Grades C and D; and Type III, Grades E and F. Hydrostatic shell test and set pressure, blowdown, and seat tightness test shall be performed to meet the specified requirements.
SCOPE
1.1 This specification covers spring-loaded, angle style, pressure relief valves for steam, gas, and liquid system applications (excluding boiler safety and hydraulic system relief valves).  
1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.

General Information

• Status: Historical
• Publication Date: 30-Apr-2010
• ICS: 47.020.30 - Piping systems
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Relations

• Replaces: ASTM F1508-96(2004) - Standard Specification for Angle Style, Pressure Relief Valves for Steam, Gas and Liquid Services
• Effective Date: 01-May-2010
• Referred By: ASTM F1685-00(2019) - Standard Specification for Pressure-Reducing Manifolds for Air or Nitrogen Systems
• Effective Date: 01-May-2010
• Referred By: ASTM F1994-99(2023) - Standard Test Method for Shipboard Fixed Foam Firefighting Systems
• Effective Date: 01-May-2010

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:F1508 −96(Reapproved 2010) An American National Standard
Standard Specification for
Angle Style, Pressure Relief Valves for Steam, Gas, and
Liquid Services
This standard is issued under the fixed designation F1508; 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 A227/A227M Specification for Steel Wire, Cold-Drawn for
Mechanical Springs
1.1 This specification covers spring-loaded, angle style,
A229/A229M Specification for Steel Wire, Quenched and
pressure relief valves for steam, gas, and liquid system
Tempered for Mechanical Springs
applications (excluding boiler safety and hydraulic system
A231/A231M Specification for Chromium-Vanadium Alloy
relief valves).
Steel Spring Wire
1.2 The values stated in inch-pound units are to be regarded
A276 Specification for Stainless Steel Bars and Shapes
as standard. No other units of measurement are included in this
A313/A313M Specification for Stainless Steel Spring Wire
standard.
A351/A351M Specification for Castings, Austenitic, for
Pressure-Containing Parts
2. Referenced Documents
A479/A479M Specification for Stainless Steel Bars and
2.1 ASTM Standards: Shapes for Use in Boilers and Other Pressure Vessels
A105/A105M Specification for Carbon Steel Forgings for A494/A494M Specification for Castings, Nickel and Nickel
Piping Applications Alloy
A125 Specification for Steel Springs, Helical, Heat-Treated
A689 Specification for Carbon and Alloy Steel Bars for
A182/A182M Specification for Forged or Rolled Alloy and Springs
Stainless Steel Pipe Flanges, Forged Fittings, and Valves
B21/B21M Specification for Naval Brass Rod, Bar, and
and Parts for High-Temperature Service Shapes
A193/A193M Specification for Alloy-Steel and Stainless
B61 Specification for Steam or Valve Bronze Castings
Steel Bolting for High Temperature or High Pressure B62 Specification for Composition Bronze or Ounce Metal
Service and Other Special Purpose Applications Castings
A194/A194M Specification for Carbon andAlloy Steel Nuts B148 Specification for Aluminum-Bronze Sand Castings
for Bolts for High Pressure or High Temperature Service, B164 Specification for Nickel-Copper Alloy Rod, Bar, and
or Both Wire
A216/A216M SpecificationforSteelCastings,Carbon,Suit- B637 Specification for Precipitation-Hardening and Cold
able for Fusion Welding, for High-Temperature Service Worked Nickel Alloy Bars, Forgings, and Forging Stock
A217/A217M Specification for Steel Castings, Martensitic for Moderate or High Temperature Service
Stainless and Alloy, for Pressure-Containing Parts, Suit- D5204 Classification System for Polyamide-Imide (PAI)
able for High-Temperature Service Molding and Extrusion Materials
F467 Specification for Nonferrous Nuts for General Use
F468 Specification for Nonferrous Bolts, Hex Cap Screws,
Socket Head Cap Screws, and Studs for General 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
2.2 ANSI Standards:
Machinery and Piping Systems.
ANSI B1.1 Unified Screw Threads
Current edition approved May 1, 2010. Published June 2010. Originally
ANSI B16.5 Pipe Flanges and Flanged Fittings
approved in 1996. Last previous edition approved in 2004 as F1508 – 96 (2004).
DOI: 10.1520/F1508-96R10. ANSIB16.34 Valves—Flanged,Threaded,andWeldingEnd
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1508−96 (2010)
2.3 ASME Standard: 3.1.3 blowdown—the difference between the set pressure
ASME Boiler and Pressure Vessel Code and the reseating pressure. Blowdown is expressed in pound-
force per square inch or a percent of the set pressure. The
2.4 API Standards:
accumulation and blowdown establish the operating band of
API 526 Flanged Steel Safety-Relief Valves
the pressure relief valve at a particular set pressure.
API RP 520, Part 1 Recommended Practice for the Design
and Installation of Pressure-Relieving Systems in Refin-
3.1.4 blowdown pressure—the set pressure minus the blow-
eries
down. Blowdown pressure is expressed in pound-force per
square inch gage.
2.5 Federal Specifications:
QQ-N-281 Nickel-Copper Alloy Bar, Rod, Plate, Sheet,
3.1.5 built-up backpressure—the static discharge pressure at
Strip, Wire, Forgings, and Structural and Special Shaped
the outlet of a pressure relief valve caused by the pressure drop
Sections
in the discharge piping while the valve is discharging.
QQ-N-286 Nickel-Copper-AluminumAlloy, Wrought (UNS
3.1.6 gagging device—a device, normally a screw (also
N05500)
called test gag), used to prevent the pressure relief valve from
2.6 Military Standards and Specifications:
opening during a hydrostatic pressure test of the equipment on
MIL-STD-167-1 Mechanical Vibrations of Shipboard
which it is installed.
Equipment (Type I—Environmental and Type II—
3.1.7 inlet piping—when used in this specification, refers to
Internally Excited)
all piping and fittings between the source and the inlet
MIL-STD-1330 Cleaning andTesting of Shipboard Oxygen,
connection to the pressure relief valve.
Nitrogen and Hydrogen Gas Piping Systems
3.1.8 instability (chatter, flutter)—an unstable operation of
MIL-F-1183 Fittings, Pipe, Cast Bronze, Silver Brazing,
the pressure relief valve characterized by rapid seating and
General Specification for
unseating of the disk during discharge. This hammering of the
MIL-F-20042 Flanges, Pipe and Bulkhead, Bronze (Silver
disk on the seat can cause high loading forces, which can lead
Brazing)
to damage and rapid failure of the seating and sliding surfaces.
MIL-P-46122 Plastic Molding Material and Plastic Extru-
3.1.9 maximum system operating pressure—the highest
sion Material, Polyvinylidene Fluoride Polymer and Co-
pressure that can exist in a system, vessel, or component under
polymer
normal (noncasualty) operating conditions. This is a normal
MIL-R-17131 Rods, Welding, Surfacing
(noncasualty) pressure that the pressure relief valve is not
MIL-S-901 Shock Tests, H.I. (High-Impact); Shipboard
intended to protect against. This pressure can be the result of
Machinery, Equipment and Systems, Requirements for
influences such as pump or compressor shutoff pressure,
MS 16142 Boss, Gasket-Seal Straight Thread Tube Fitting,
pressure regulating valve lockup (no flow) pressure, and so
Standard Dimensions for
forth.
MS 51840 Plug, Machine Thread, O-ring
3.1.10 openingpressure—thevalueofincreasinginletstatic
2.7 Naval Sea Systems Command (NAVSEA):
Drawings: pressure of a pressure relief valve at which there is a measur-
able lift, or at which the discharge becomes continuous by
803-1385884 Unions,FittingsandAdapters,ButtandSocket
Welding, 6000 PSI, WOG IPS seeing, feeling, or hearing.
803-1385943 Unions, Silver Brazing, 3000 PSI, WOG IPS,
3.1.11 outlet piping (or discharge piping)—when used in
for UT Inspection
this specification, refers to all piping and fittings between the
803-1385946 Unions, Bronze Silver Brazing,WOG, for UT
pressure relief valve outlet connection and the main, tank, or
Inspection
atmosphere to which the pressure relief valve relieves.
3.1.12 popping pressure—the value of increasing inlet static
3. Terminology
pressure at which the disk moves in the opening direction at a
3.1 Definitions:
faster rate as compared with the corresponding movement at
3.1.1 accumulation—the increase in static pressure above
higher or lower pressures. It generally applies to valves with
the set pressure during discharge through the valve, when the
compressible fluid service such as steam, gas, and so forth.
valve passes the rated flow. Accumulation is expressed in
3.1.13 pressure relief valve—an automatic pressure reliev-
pound-force per square inch or as a percent of the set pressure.
ing device actuated by the static pressure upstream of the valve
3.1.2 accumulation pressure—the set pressure plus the ac-
and characterized by either rapid opening (pop action for gas,
cumulation. Accumulation pressure is expressed in pound-
vapor, or steam) or gradual opening (for liquids).
force per square inch gage.
3.1.14 primary and secondary pressure zones of pressure
relief valve—primary pressure zone refers to all portions of the
pressure-containing envelope subject to inlet pressure; second-
Available from American Society of Mechanical Engineers (ASME), ASME
ary pressure zone refers to all portions of the pressure-
International Headquarters, Three Park Ave., New York, NY 10016-5990, http://
containing envelope subject to outlet or discharge pressure
www.asme.org.
Available from American Petroleum Institute (API), 1220 L. St., NW,
(includes spring housing of nonvented valves).
Washington, DC 20005-4070, http://www.api.org.
3.1.15 relieving capacity (also called flow capacity)—the
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. pressure relief valve is defined as the quantity of pressure
F1508−96 (2010)
medium relieving through the pressure relief valve at the 5. Ordering Information
accumulationpressure,suchaspoundperhourofsteam,gallon
5.1 Ordering documentation for valves under this specifica-
per minute of water at 70°F, or SCFM (standard cubic feet per
tion shall include the following information, as required, to
minute at 60°F and 14.7 psia) of air, as applicable.
describe the equipment adequately.
5.1.1 ASTM designation and year of issue.
3.1.16 set pressure—the value of increasing inlet static
pressure at which a pressure relief valve displays one of the 5.1.2 Valve specification code (see 6.2).
5.1.3 Quantity of valves.
operational characteristics as defined under opening pressure,
or start-to-leak pressure. Set pressure is expressed in pound- 5.1.4 Maximum inlet temperature.
5.1.5 Set pressure.
force per square inch gage.
5.1.6 Requiredrelievingcapacity(flow)attheaccumulation
3.1.17 set pressure range—the range over which the set
pressure.
pressure can be adjusted with the installed spring.
5.1.7 Installation limitations data, if different than specified
3.1.18 setpressuretolerance—thepermissibleplusorminus
in 7.9.
deviationfromthespecifiedsetpressure.Setpressuretolerance
5.1.8 Blowdown limits, if different than specified in 7.7.
is expressed in pound-force per square inch or as a percent of
5.1.9 Envelope dimensions, if not covered in Table 13 and
the set pressure.
Table 14.
5.1.10 Supplementary requirements, if any (see S1 through
3.1.19 source—when used in this specification, refers to the
S5).
pressure container being protected from overpressure by the
pressure relief valve, for example, piping main, pressure vessel
6. Valve Coding and Construction
or tank, casing, and so forth.
6.1 Valves shall incorporate the design features specified in
3.1.20 start-to-leak pressure—the value of increasing inlet
6.2 and 6.3.
static pressure at which the first bubble occurs when a pressure
6.2 Valve Specification Coding—Basicvalvedesignfeatures
relief valve for compressible fluid service of the resilient disk
shall be specified and recorded using the following valve
design is tested by means of air under a specified water seal on
coding system. The valve specification code contains nine
the outlet.
fields of information, which describe the construction features
3.1.21 superimposed backpressure—the static pressure on
of the valve. Each of these nine fields are further assigned their
thedischargesideofapressurereliefvalvepriortotheopening
respective codes in accordance with Tables 1-7.
of the pressure relief valve. This pressure exists where the
pressure relief valve discharges into a common pipeline shared
with other pressure sources such as pressure relief valves, or
intoapressurizedorclosedsystem.Thispressuremayhavethe
effect of changing the set pressure of the pressure relief valve.
3.1.22 top-guided valve—this type of valve has all the
guiding, rubbing, or contacting surfaces on the discharge side
of the seat.
4. Classification
6.3 Construction—Valve construction shall be in accor-
4.1 Pressurereliefvalvesshallbeofthefollowingtypesand
dance with the requirements specified in 6.3.1 – 6.3.19.
material grades:
6.3.1 The materials of construction for various valve com-
4.1.1 Type I—For Steam Service:
ponentsaredetailedinTable8forTypeIvalvesandTable9for
4.1.1.1 Grade A—Alloy steel construction (for steam ser- Types II and III valves.
vice temperatures up to 1000°F) (see Table 8). 6.3.2 General Requirements—The valve shall be self-
contained, single-seated, and spring-loaded where the inlet
4.1.1.2 Grade B—Carbon steel construction (for steam ser-
pressure is directly sensed under the spring-loaded disk. The
vice temperatures up to 775°F) (see Table 8).
valve shall incorporate only a single inlet and a single outlet
4.1.2 Type II—For Air, Gas Service:
connection.
4.1.2.1 Grade C—Bronze or stainless steel construction (for
air, gas service excluding oxygen) (see Table 9).
TABLE 1 Valve Type and Material Code
4.1.2.2 Grade D—Ni-Cu alloy construction (for oxygen)
Valve Classification
Valve Type and Material
(see Table 9).
Code
Valve Type Material Grade
4.1.3 Type III—For Liquid Service (except hydraulic oil):
IA 1
IB 2
4.1.3.1 Grade E—Ferrous construction (for noncorrosive
II C 3
liquids, such as fuel oil, water, steam condensate, and so forth)
II D 4
III E 5
(see Table 9).
III F 6
4.1.3.2 Grade F—Nonferrous construction (for corrosive
As specified as specified 9
liquids, such as seawater, and so forth) (see Table 9).
F1508−96 (2010)
TABLE 2 Codes for Valve Inlet/Outlet Pipe Size
Nominal valve inlet or
As
outlet pipe size, in. 0.25 0.38 0.50 0.75 1.00 1.25 1.5 2.0 2.5 3.0 3.5 4.0 5.0 6.0 8.0 10.0
specified
(NPS)
Code A B C D E F G H J K L M N P R T W
TABLE 3 End Connection Codes for Valve Inlet and Outlet Ports
6.3.5 Bonnet Construction (Spring Housing):
NOTE1—Unlessotherwisespecifiedinthepurchaseorder(CodeW),all 6.3.5.1 ForTypeIvalves,thebonnetshallbeattachedtothe
ANSI flanges shall have raised faces.
body with bolted flanges. Type I, Grade A valves must have
exposed spring bonnets—the discharge flow released through
NOTE 2—Unless otherw
...