ASTM F1508-96

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

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).

General Information

• Status: Historical
• Publication Date: 31-Dec-1995
• ICS: 47.020.30 - Piping systems
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Relations

• Replaced By: ASTM F1508-96(2004) - Standard Specification for Angle Style, Pressure Relief Valves for Steam, Gas and Liquid Services
• Effective Date: 01-May-2004
• Referred By: ASTM F1994-99(2023) - Standard Test Method for Shipboard Fixed Foam Firefighting Systems
• Effective Date: 01-Jan-1996
• Referred By: ASTM F1685-00(2019) - Standard Specification for Pressure-Reducing Manifolds for Air or Nitrogen Systems
• Effective Date: 01-Jan-1996

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F 1508 – 96
Standard Specification for
Angle Style, Pressure Relief Valves for Steam, Gas, and
Liquid Services
This standard is issued under the fixed designation F 1508; 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 A 351/A351M Specification for Castings, Austenitic,
Austenitic-Ferritic (Duplex), for Pressure-Containing
1.1 This specification covers spring-loaded, angle style,
Parts
pressure relief valves for steam, gas, and liquid system
A 479/A479M Specification for Stainless and Heat-
applications (excluding boiler safety and hydraulic system
Resisting Steel Bars and Shapes for Use in Boilers and
relief valves).
Other Pressure Vessels
2. Referenced Documents
A 494/A494M Specification for Castings, Nickel and
Nickel Alloy
2.1 ASTM Standards:
A 689 Specification for Carbon and Alloy Steel Bars for
A 105 Specification for Forgings, Carbon Steel, for Piping
Springs
Components
B 21 Specification for Naval Brass Rod, Bar, and Shapes
A 125 Specification for Steel Springs, Helical, Heat
B 61 Specification for Steam or Valve Bronze Castings
Treated
B 62 Specification for Composition Bronze or Ounce Metal
A 182 Specification for Forged or Rolled Alloy-Steel Pipe
Castings
Flanges, Forged Fittings, and Valves and Parts for High-
B 148 Specification for Aluminum Bronze Castings
Temperature Service
B 164 Specification for Nickel-Copper Alloy Rod, Bar, and
A 193 Specification for Alloy-Steel and Stainless Steel
Wire
Bolting Materials for High-Temperature Service
B 637 Specification for Precipitation Hardening Nickel-
A 194 Specification for Carbon and Alloy Steel Nuts for
Alloy Bars, Forgings, and Forging Stock for High-
Bolts for High-Pressure and High-Temperature Service
Temperature Service
A 216/A216M Specification for Steel Castings, Carbon,
D 5204 Specification for Polyamide-Imide (PAI) Molding
Suitable for Fusion Welding for High-Temperature Ser-
and Extrusion Materials
vice
F 467 Specification for Nonferrous Nuts for General Use
A 217/A217M Specification for Steel Castings, Martensitic
F 468 Specification for Nonferrous Bolts, Hex Cap Screws,
Stainless and Alloy, for Pressure-Containing Parts, Suit-
and Studs for General Use
able for High-Temperature Service
2.2 ANSI Standards:
A 227/A227M Specification for Steel Wire, Cold-Drawn for
ANSI B.1 Unified Screw Threads
Mechanical Springs
ANSI B16.5 Pipe Flanges and Flanged Fittings
A 229/A229M Specification for Steel Wire, Oil-Tempered
ANSI B16.34 Valves—Flanged, Threaded, and Welding
for Mechanical Springs
End
A 231/A231M Specification for Chromium-Vanadium Al-
2.3 ASME Standard:
loy Steel Spring Wire
Boiler and Pressure Vessel Code
A 276 Specification for Stainless and Heat-Resisting Steel
2.4 API Standards:
Bars and Shapes
A 313 Specification for Chromium-Nickel Stainless and
Heat-Resisting Steel Spring Wire
Annual Book of ASTM Standards, Vol 02.01.
Annual Book of ASTM Standards, Vol 02.04.
1 8
This specification is under the jurisdiction of ASTM Committee F25 on Ships Annual Book of ASTM Standards, Vol 08.03.
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on Annual Book of ASTM Standards, Vol 15.08.
Machinery and Piping Systems. Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
Current edition approved Nov. 10, 1996. Published October 1997. 4th Floor, New York, NY 10036.
2 11
Annual Book of ASTM Standards, Vol 01.01. Available from American Society of Mechanical Engineers (ASME), ASME
Annual Book of ASTM Standards, Vol 01.05. International Headquarters, Three Park Ave., New York, NY 10016-5990.
4 12
Annual Book of ASTM Standards, Vol 01.02. Available from The American Petroleum Institute (API), 1220 L. St., NW,
Annual Book of ASTM Standards, Vol 01.03. Washington, DC 20005.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F 1508 – 96
API Standard 526 Flanged Steel Safety-Relief Valves 3.1.5 built-up backpressure—the static discharge pressure at
API Standard RP 520, Part 1 Recommended Practice for the outlet of a pressure relief valve caused by the pressure drop
the Design and Installation of Pressure-Relieving Systems in the discharge piping while the valve is discharging.
in Refineries
3.1.6 gagging device—a device, normally a screw (also
2.5 Federal Specifications:
called test gag), used to prevent the pressure relief valve from
QQ-N-281 Nickel-Copper Alloy Bar, Rod, Plate, Sheet,
opening during a hydrostatic pressure test of the equipment on
Strip, Wire, Forgings, and Structural and Special Shaped
which it is installed.
Sections
3.1.7 inlet piping—when used in this specification, refers to
QQ-N-286 Nickel-Copper-Aluminum Alloy, Wrought
all piping and fittings between the source and the inlet
(UNS N05500)
connection to the pressure relief valve.
2.6 Military Standards and Specifications:
3.1.8 instability (chatter, flutter)—an unstable operation of
MIL-STD-167-1 Mechanical Vibrations of Shipboard
the pressure relief valve characterized by rapid seating and
Equipment (Type I—Environmental and Type II—
unseating of the disk during discharge. This hammering of the
Internally Excited)
disk on the seat can cause high loading forces which can lead
MIL-STD-1330 Cleaning and Testing of Shipboard Oxy-
to damage and rapid failure of the seating and sliding surfaces.
gen, Nitrogen and Hydrogen Gas Piping Systems
3.1.9 maximum system operating pressure—the highest
MIL-F-1183 Fittings, Pipe, Cast Bronze, Silver Brazing,
pressure which can exist in a system, vessel, or component
General Specification for
under normal (noncasualty) operating conditions. This is a
MIL-F-20042 Flanges, Pipe and Bulkhead, Bronze (Silver
normal (noncasualty) pressure which the pressure relief valve
Brazing)
is not intended to protect against. This pressure can be the
MIL-P-46122 Plastic Molding Material and Plastic Extru-
result of influences such as pump or compressor shutoff
sion Material, Polyvinylidene Fluoride Polymer and Co-
pressure, pressure regulating valve lockup (no flow) pressure,
polymer
and so forth.
MIL-R-17131 Rods, Welding, Surfacing
3.1.10 opening pressure—the value of increasing inlet
MIL-S-901 Shock Tests, H.I. (High-Impact); Shipboard
static pressure of a pressure relief valve at which there is a
Machinery, Equipment and Systems, Requirements for
measurable lift, or at which the discharge becomes continuous
MS 16142 Boss, Gasket-Seal Straight Thread Tube Fitting,
by seeing, feeling, or hearing.
Standard Dimensions for
3.1.11 outlet piping (or discharge piping)—when used in
MS 51840 Plug, Machine Thread, O-ring
2.7 Naval Sea Systems Command (NAVSEA): this specification, refers to all piping and fittings between the
pressure relief valve outlet connection and the main, tank, or
Drawings:
803-1385884 Unions, Fittings and Adapters, Butt and atmosphere to which the pressure relief valve relieves.
Socket Welding, 6000 PSI, WOG IPS
3.1.12 popping pressure—the value of increasing inlet static
803-1385943 Unions, Silver Brazing, 3000 PSI, WOG IPS,
pressure at which the disk moves in the opening direction at a
for UT Inspection
faster rate as compared with the corresponding movement at
803-1385946 Unions, Bronze Silver Brazing, WOG, for UT
higher or lower pressures. It generally applies to valves with
Inspection
compressible fluid service such as steam, gas, and so forth.
3.1.13 pressure relief valve—an automatic pressure reliev-
3. Terminology
ing device actuated by the static pressure upstream of the valve
3.1 Definitions:
and characterized by either rapid opening (pop action for gas,
3.1.1 accumulation—the increase in static pressure above
vapor, or steam) or gradual opening (for liquids).
the set pressure during discharge through the valve, when the
3.1.14 primary and secondary pressure zones of pressure
valve passes the rated flow. Accumulation is expressed in
relief valve—primary pressure zone refers to all portions of the
pound-force per square inch or as a percent of the set pressure.
pressure-containing envelope subject to inlet pressure; second-
3.1.2 accumulation pressure—the set pressure plus the ac-
ary pressure zone refers to all portions of the pressure-
cumulation. Accumulation pressure is expressed in pound-
containing envelope subject to outlet or discharge pressure
force per square inch gage.
(includes spring housing of nonvented valves).
3.1.3 blowdown—the difference between the set pressure
3.1.15 relieving capacity (also called flow capacity)—the
and the reseating pressure. Blowdown is expressed in pound-
pressure relief valve is defined as the quantity of pressure
force per square inch or a percent of the set pressure. The
medium relieving through the pressure relief valve at the
accumulation and blowdown establish the operating band of
accumulation pressure such as: pound per hour of steam, gallon
the pressure relief valve at a particular set pressure.
per minute of water at 70°F, or SCFM (standard cubic feet per
3.1.4 blowdown pressure—the set pressure minus the blow-
minute at 60°F and 14.7 psia) of air, as applicable.
down. Blowdown pressure is expressed in pound-force per
3.1.16 set pressure—the value of increasing inlet static
square inch gage.
pressure at which a pressure relief valve displays one of the
operational characteristics as defined under opening pressure,
or start-to-leak pressure. Set pressure is expressed in pound-
Available from Standardization Documents Order Desk, Bldg. 4 Section D,
700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. force per square inch gage.
F 1508 – 96
3.1.17 set pressure range—the range over which the set 5.1.8 Blowdown limits, if different than specified in 7.7.
pressure can be adjusted with the installed spring. 5.1.9 Envelope dimensions, if not covered in Table 13 and
3.1.18 set pressure tolerance—the permissible plus or mi- Table 14.
nus deviation from the specified set pressure. Set pressure 5.1.10 Supplementary requirements, if any (see S1 through
tolerance is expressed in pound-force per square inch or as a S5).
percent of the set pressure.
6. Valve Coding And Construction
3.1.19 source—when used in this specification, refers to the
6.1 Valves shall incorporate the design features specified in
pressure container being protected from overpressure by the
6.2 and 6.3.
pressure relief valve, for example, piping main, pressure vessel
6.2 Valve Specification Coding—Basic valve design fea-
or tank, casing, and so forth.
tures shall be specified and recorded using the following valve
3.1.20 start-to-leak pressure—the value of increasing inlet
coding system. The valve specification code contains nine
static pressure at which the first bubble occurs when a pressure
fields of information, which describe the construction features
relief valve for compressible fluid service of the resilient disk
of the valve. Each of these nine fields are further assigned their
design is tested by means of air under a specified water seal on
respective codes in accordance with Tables 1-7.
the outlet.
3.1.21 superimposed backpressure—the static pressure on
the discharge side of a pressure relief valve prior to the opening
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
into a pressurized or closed system. This pressure may have the
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.
6.3 Construction—Valve construction shall be in accor-
4. Classification
dance with the requirements specified in 6.3.1-6.3.19.
6.3.1 The materials of construction for various valve com-
4.1 Pressure relief valves shall be of the following types and
ponents are detailed in Table 8 for Type I valves and Table 9 for
material grades:
Types II and III valves.
4.1.1 Type I—For Steam Service:
6.3.2 General Requirements—The valve shall be self-
4.1.1.1 Grade A—Alloy steel construction (for steam ser-
contained, single-seated, and spring-loaded where the inlet
vice temperatures up to 1000°F) (see Table 8).
pressure is directly sensed under the spring-loaded disk. The
4.1.1.2 Grade B—Carbon steel construction (for steam
valve shall incorporate only a single inlet and a single outlet
service temperatures up to 775°F) (see Table 8).
connection.
4.1.2 Type II—For Air, Gas Service:
6.3.3 Pressure-Temperature Ratings—The pressure-
4.1.2.1 Grade C—Bronze or stainless steel construction (for
temperature ratings of a pressure relief valve consist of ratings
air, gas service excluding oxygen) (see Table 9).
for the primary and secondary pressure zones.
4.1.2.2 Grade D—Ni-Cu alloy construction (for oxygen)
6.3.3.1 Pressure-Temperature Rating of the Primary Pres-
(see Table 9).
sure Zone—This shall correspond to the rating of the inlet end
4.1.3 Type III—For Liquid Service (except hydraulic oil):
connection, and is given in Table 10.
4.1.3.1 Grade E—Ferrous construction (for noncorrosive
6.3.3.2 Pressure-Temperature Rating of the Secondary Pres-
liquids, such as fuel oil, water, steam condensate, and so forth)
sure Zone—The secondary pressure zone shall withstand the
(see Table 9).
higher of the following:
4.1.3.2 Grade F—Nonferrous construction (for corrosive
(a) 150 % of maximum backpressure buildup specified in
liquids, such as seawater, and so forth) (see Table 9).
7.9.
5. Ordering Information
(b) 600 psig (for Type II, Grade C and Type III, Grade F
valves only).
5.1 Ordering documentation for valves under this specifica-
tion shall include the following information, as required, to
TABLE 1 Valve Type and Material Code
describe the equipment adequately.
5.1.1 ASTM designation and year of issue.
Valve Classification
Valve Type and Material
5.1.2 Valve specification code (see 6.2).
Code
Valve Type Material Grade
5.1.3 Quantity of valves.
IA 1
5.1.4 Maximum inlet temperature.
IB 2
5.1.5 Set pressure.
IIC3
5.1.6 Required relieving capacity (flow) at the accumulation IID4
III E 5
pressure.
III F 6
5.1.7 Installation limitations data, if different than specified
As specified as specified 9
in 7.9.
F 1508 – 96
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
...