ASTM F1685-00(2006)
(Specification)Standard Specification for Pressure-Reducing Manifolds for Air or Nitrogen Systems
Standard Specification for Pressure-Reducing Manifolds for Air or Nitrogen Systems
ABSTRACT
This specification covers the design, construction, testing and operating requirements for pressure-reducing manifolds for air or nitrogen systems, which constitute the combination of all components and piping between, and including, the inlet and outlet ports. The manufactured manifolds shall perform satisfactorily to the following procedures: visual examination; hydrostatic shell test; relief-valve lift test; seat tightness test; and external leakage test.
SCOPE
1.1 This specification covers the design, construction, testing and operating requirements for pressure-reducing manifolds for air or nitrogen systems, referred to herein also as manifolds. The term manifold constitutes the combination of all components and piping between, and including, the inlet and outlet ports (see Fig. 1 and Fig. 2).
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses (metric SI units) are 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:F1685 −00(Reapproved 2006) An American National Standard
Standard Specification for
Pressure-Reducing Manifolds for Air or Nitrogen Systems
This standard is issued under the fixed designation F1685; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope MIL-F-1183Fittings, Pipe, Cast Bronze, Silver-Brazing,
General Specification for
1.1 This specification covers the design, construction, test-
2.4 Government Drawings:
ing and operating requirements for pressure-reducing mani-
Naval Sea Systems Command (NAVSEA):
folds for air or nitrogen systems, referred to herein also as
NAVSEA803-1385884Unions, Fittings and Adapters Butt
manifolds. The term manifold constitutes the combination of
and Socket Welding 6000 PSI, WOG and OXY (IPS)
all components and piping between, and including, the inlet
NAVSEA803-1385943Unions, Silver Brazing 3000 PSI,
and outlet ports (see Fig. 1 and Fig. 2).
WOG, IPS, for UT Inspection
1.2 Thevaluesstatedininch-poundunitsaretoberegarded
NAVSEA803-1385946 Unions, Bronze, Silver Brazing,
as the standard. The values given in parentheses (metric SI
WOG for UT Inspection, 1500 PSI, WOG
units) are for information only.
3. Terminology
2. Referenced Documents
3.1 Definitions:
2.1 ASTM Standards:
3.1.1 accuracy of regulation—the amount by which the
F992Specification for Valve Label Plates
downstreampressuremayvarywhenthemanifoldissetatany
F1508Specification forAngle Style, Pressure Relief Valves
pressurewithintherequiredsetpressurerangeandissubjected
for Steam, Gas, and Liquid Services
to any combination of inlet pressure, flow demand, and
F1795Specification for Pressure-ReducingValves forAir or
ambient temperature variations within the specified limits.
Nitrogen Systems
3.1.2 bubble-tight—No visible leakage over a 5-min period
2.2 American Society of Mechanical Engineers (ASME):
usingeitherwatersubmersionortheapplicationofbubblefluid
B1.1UnifiedScrew Threads
for detection.
2.3 Military Standards and Specifications:
3.1.3 external leakage—Leakage from the manifold which
MIL-STD-167-1 Mechanical Vibrations of Shipboard
escapes to atmosphere.
Equipment (Type I—Environmental and Type II— Inter-
3.1.4 flow rate demand—the amount of flow demanded at
nally Excited)
any given time by the system downstream of the manifold.
MIL-STD-740AirborneandStructureborneNoiseMeasure-
ments and Acceptance Criteria of Shipboard Equipment
3.1.5 flow rate demand range—the range over which the
MS16142Boss, Gasket Seal Straight Thread Tube Fitting,
flow demand can vary.
Standard Dimensions for
3.1.6 hydrostatic shell test pressures—the hydrostatic test
MIL-S-901Shock Tests, H.I. (High-Impact); Shipboard
pressures that the inlet and outlet sections of the manifold are
Machinery, Equipment and Systems, Requirements for
required to withstand without damage. Manifold operation is
not required during application of shell test pressure, but the
manifold must meet all performance requirements after the
This specification is under the jurisdiction ofASTM Committee F25 on Ships
shell test pressure has been removed.
and Marine Technology and is under the direct responsibility of Subcommittee
F25.11 on Machinery and Piping Systems.
3.1.7 inlet operating pressure range—the range over which
Current edition approved May 1, 2006. Published May 2006. Originally
the inlet pressure supplied to the manifold can vary under any
approved in 1996. Last previous edition approved in 2000 as F1685–00. DOI:
operational conditions which the manifold can be subjected to
10.1520/F1685-00R06.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or in service.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.1.8 internal leakage—leakage from higher pressure to
Standards volume information, refer to the standard’s Document Summary page on
lower pressure portions of the manifold and which does not
the ASTM website.
Available from American Society of Mechanical Engineers (ASME), ASME
escape to atmosphere.
International Headquarters, Three Park Ave., New York, NY 10016-5990.
3.1.9 manifold rated pressures—theinletandoutletpressure
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. ratingsofthemanifold.Theseratedpressuresareselectedfrom
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1685−00 (2006)
FIG. 1 Manifold Configuration
FIG. 2Manifold Configuration
the applicable pressure ratings (see 4.2) and specified in the 3.1.13 maximum outlet operating pressure—the highest
ordering information (see Section 5). The inlet pressure rating pressureatthemanifoldoutletinservice.Thisisestablishedby
is applicable from the manifold inlet up to and including the the accumulation pressure of the pressure-relief valve.
seats of the outlet stop valve and bypass throttle valve. The
3.1.14 maximum set pressure—the highest set pressure at
outlet pressure rating is applicable from the outlet side of the
which the manifold can meet the performance requirements
seats of the outlet stop valve to the manifold outlet and the
specified.
bypass throttle valve to the manifold outlet.
3.1.15 minimum flow rate demand—the minimum flow rate
3.1.10 manual valves—these are all the manually operated
demanded of the manifold by the downstream system.
valves in the manifold which include handwheel-operated
3.1.16 minimum inlet operating pressure—the lowest pres-
valves and wrench-operated valves. The handwheel-operated
sure supplied to the inlet of the manifold in service.
valves are the inlet and outlet stop valves, and the bypass
3.1.17 minimum outlet operating pressure—thelowestpres-
throttle valve. The wrench-operated valves are the upstream
sureatthemanifoldoutletinservice.Thisisestablishedbythe
anddownstreambleedvalvesandthegageisolationvalve.The
accuracy of regulation of the pressure-reducing valve.
requirements for any manually operated valves installed in the
pressure-reducing valve are covered under 6.5.1.
3.1.18 minimum set pressure—the lowest set pressure at
which the manifold can meet the performance requirements
3.1.11 maximum flow rate demand—the maximum amount
of flow demanded of the manifold by the downstream system. specified.
3.1.12 maximum inlet operating pressure—the highest pres- 3.1.19 operating pressures—the pressures within the mani-
sure supplied to the inlet of the manifold in service. fold during service.
F1685−00 (2006)
3.1.20 pressure-reducing valve—the component of the 5.1.3 Size and type of outlet end connection (see 4.3 and
manifold which accomplishes automatic regulation of the 6.4.2),
downstreampressure.Inthiscomponent,theupstreampressure 5.1.4 Size and type of end connections for pressure-
is reduced to the desired downstream pressure. reducing valve and pressure-relief valve,
5.1.5 If tail pieces and union nuts are required (when
3.1.21 pressure-relief valve—thecomponentofthemanifold
required, their material of construction shall be per Table 1),
which protects the manifold and downstream systems against
5.1.6 Manifold configuration, inlet and outlet pressure rat-
downstream over pressurization.
ings (see 4.1 and 4.2),
3.1.22 set pressure—the outlet pressure delivered by the
5.1.7 Manifold inlet operating pressure range,
manifold at the time the pressure setting is made. For the
5.1.8 Type of mounting required: bottom or back mounting
purposes of this specification, it will be assumed that the
(see 6.4.3),
setting is made when there is no flow demand on the manifold
5.1.9 Set pressure and set pressure range, if other than
(“lock-up” condition), and the manifold is at surrounding
specified (see 7.3),
ambient temperature.
5.1.10 Flow rate demand range (see 7.1, S1.1.6),
3.1.23 set pressure range—the range of set pressures over
5.1.11 Accuracy of regulation required, if other than speci-
which the manifold can be adjusted while meeting the perfor-
fied, or if set pressure is below 10 psig (see 7.2),
mance requirements specified.
5.1.12 Relief valve set pressure and accumulation pressure
(if different from Specification F1508),
3.1.24 wide open capacity—the flow rate when a valve is in
a position which presents the least resistance to flow. 5.1.13 Ambient atmospheric conditions: temperature range,
chemical contaminants, if any,
4. Classification
5.1.14 Quality of inlet air/nitrogen gas: temperature range,
moisture content, oil/lubricant contaminants, if any,
4.1 Configuration— Manifolds shall be of the following
5.1.15 Special tools required (see 6.7),
configurations and specified in the ordering information (see
5.1.16 Tamper-proof lead seal if required (see Specification
5.1).
F1795, Section 5),
Configuration 1-1 One reducer, one relief (see Fig. 1).
5.1.17 Supplementaryrequirements,ifany(S1throughS4),
Configuration 2-1 Two reducers, one relief (see Fig. 2).
and
4.2 Pressure Ratings—Manifolds shall have inlet-rated
5.1.18 Maximumvibrationfrequency,ifotherthanspecified
pressures and outlet-rated pressures selected from the follow-
(see S1.1.9).
ing categories: 400-, 1500-, 3000-, and 6000-psig (2.8-, 10.3-,
20.7-, and 41.4-MPa gage pressure). The inlet and outlet
6. Manifold Construction
pressure ratings selected shall be specified in Section 5.
6.1 Manifoldsshallincorporatethedesignfeaturesspecified
4.3 End Connections—Manifolds shall have inlet and outlet
in 6.2-6.11.
end connections selected from those listed in Table 1 and
6.2 Materials of Construction—Material requirements for
specified in Section 5.
the assemblies in the manifold shall be as specified in the
applicable component specifications referenced herein. Mate-
5. Ordering Information
rials for all other parts, including the inlet and outlet manifold
5.1 Ordering documentation for manifolds under this speci-
blocks, shall be 300 series corrosion-resistant steel (SS304,
ficationshallincludethefollowinginformation,asrequired,to
304L, 316, or 316L) or other materials selected to provide
describe the equipment adequately:
weldability and corrosion resistance without requiring paint-
5.1.1 ASTM designation and year of issue,
ing, coating, or plating. The inlet and outlet manifold blocks
5.1.2 Size and type of inlet end connection (see 4.3 and
shallbeweldrepairable.Materialsforcontactingpartsshallbe
6.4.2),
selected to minimize electrolytic corrosion and galling. Metal-
lic materials shall conform to applicableASTM specifications.
TABLE 1 Manifold Inlet and Outlet End Connections
Nonmetallic materials shall be compatible with the line me-
Type of End Connection Pressure Rating, Applicable dium.
lb/in (MPa) Documents
6.3 General Requirements—Manifolds shall incorporate the
A
Union , silver-brazed 400 (2.8) MIL-F-1183 (O-ring type)
A
functionalelementsshownschematicallyinFig.1orFig.2,as
Union , silver-brazed 1500 (10.3) 803-1385946
A
Union , silver-brazed 3000 (20.5) 803-1385943
applicable, and delineated below:
A
Union , butt/socket 6000 (41.4) 803-1385884
(1) Inlet and outlet stop valves,
weld
As specified As specified As specified (2) Upstream and downstream bleed valves (for depressur-
A
ization of all components and fluid cavities.),
Onlythepertinentdimensionslistedintheapplicabledocumentsapplicableto
the straight thread portion of the thread piece shall apply. Thread pieces shall be
(3) Pressure-reducing valve(s),
secured to the manifold inlet and outlet blocks using straight threads and a O-ring
(4) Pressure-relief valve,
seal design. For the manifold inlet and outlet connections, unless otherwise
specified in Section 5 the tail pieces and the union nuts shall not be furnished— (5) Gauge isolation valve, and
onlythethreadpiecesshallbefurnished.Iftailpiecesandunionnutsarerequired,
(6) Bypass throttle valve.
their materials of construction shall be in accordance with the applicable docu-
Allcomponentsshallbepartofamanifoldassembly,asshown
ments listed above and shall be specified in Section 5.
in Fig. 3 or Fig. 4, as applicable, which requires only one inlet
F1685−00 (2006)
NOTE 1—Pictorial representations are for illustrative purposes only and do not imply design.
FIG. 3Components of a Manifold Assembly
FIG. 4Components of Manifold Assembly
F1685−00 (2006)
and one outlet connection to the main flow path of the piping accurate mounting surface for both back and bottom mounting
systeminwhichitisinstalled.Theinletandoutletconnections and shall be bolted to the inlet and outlet manifold blocks in
shallbein-line.Themanifoldshallbefabricatedfrominletand such a way as to not interfere with mounting the manifold to a
outlet blocks, with interconnecting piping for the pressure- foundation plate. The manifold shall be drilled and tapped or
reducing valve(s) and bypass throttle valve flow paths. The
through-drilled to allow either bottom mounting or back
manual valves shall be cartridge mounted into the inlet and mounting as specified (see Section 5).All components shall be
outlet manifold blocks as shown in Fig. 3 or Fig. 4,as
fully and easily accessible for operation, service, or removal
applicable.Thepressure-reducingvalveandthepressure-relief from the manifold.
valve shall be mounted by way of takedown connections in
6.4.4 Threads—Threads shall be as specified in ASME
accordance with Table 1. The manifold shall be capable of
B1.1. Where necessary, provisions shall be incorporated to
meeting all requirements of this specification and provide
prevent the accidental loosening of threaded parts. The design
extendedreliableoperationwhenprotectedbya5-µmnominal/
shallbesuchthatstandardwrenchescanbeusedonallexternal
18-µm absolute filter installed upstream of the manifold inlet
bolting. Lock wire shall not be used.
and when subjected to conditions specified in Section 5.
6.4.5 Interchangeability—The entire manifold, including
6.4 Design Construction Requirements
components and all associated piece parts, shall have part
6.4.1 Pressure Envelope—The hydrostatic shell test pres-
number identity and shall be replaceable from stock or the
sures shall be 1.5 times the manifold rated inlet and outlet
manufactureronanonselectiveandrandombasis.Partshaving
pressures.
the same manufacturer’s part number shall be directly inter-
6.4.2 Connections—The main-line inlet and outlet connec-
changeable with each other with respect to installation (physi-
tions of the manifold, the inlet and outlet connections of the
cal) and performa
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