ASTM F1685-00(2019)
(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).
FIG. 1 Manifold Configuration
FIG. 2 Manifold Configuration
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F1685 −00 (Reapproved 2019) 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 2.3 Military Standards and Specifications:
MIL-STD-167-1 Mechanical Vibrations of Shipboard
1.1 This specification covers the design, construction, test-
Equipment (Type I—Environmental and Type II— Inter-
ing and operating requirements for pressure-reducing mani-
nally Excited)
folds for air or nitrogen systems, referred to herein also as
MIL-STD-740AirborneandStructureborneNoiseMeasure-
manifolds. The term manifold constitutes the combination of
ments and Acceptance Criteria of Shipboard Equipment
all components and piping between, and including, the inlet
MS16142Boss, Gasket Seal Straight Thread Tube Fitting,
and outlet ports (see Fig. 1 and Fig. 2).
Standard Dimensions for
1.2 Thevaluesstatedininch-poundunitsaretoberegarded
MIL-S-901Shock Tests, H.I. (High-Impact); Shipboard
as standard. The values given in parentheses are mathematical
Machinery, Equipment and Systems, Requirements for
conversions to SI units that are provided for information only
MIL-F-1183Fittings, Pipe, Cast Bronze, Silver-Brazing,
and are not considered standard.
General Specification for
1.3 This international standard was developed in accor-
2.4 Government Drawings:
dance with internationally recognized principles on standard-
Naval Sea Systems Command (NAVSEA):
ization established in the Decision on Principles for the
NAVSEA803-1385884Unions, Fittings and Adapters Butt
Development of International Standards, Guides and Recom-
and Socket Welding 6000 PSI, WOG and OXY (IPS)
mendations issued by the World Trade Organization Technical
NAVSEA803-1385943Unions, Silver Brazing 3000 PSI,
Barriers to Trade (TBT) Committee.
WOG, IPS, for UT Inspection
NAVSEA 803-1385946 Unions, Bronze, Silver Brazing,
2. Referenced Documents
WOG for UT Inspection, 1500 PSI, WOG
2.1 ASTM Standards:
F992Specification for Valve Label Plates 3. Terminology
F1508Specification forAngle Style, Pressure Relief Valves
3.1 Definitions:
for Steam, Gas, and Liquid Services
3.1.1 accuracy of regulation, n—the amount by which the
F1795Specification for Pressure-ReducingValves forAir or
downstreampressuremayvarywhenthemanifoldissetatany
Nitrogen Systems
pressurewithintherequiredsetpressurerangeandissubjected
2.2 ASME Standard:
to any combination of inlet pressure, flow demand, and
B1.1Unified Inch Screw Threads
ambient temperature variations within the specified limits.
3.1.2 bubble-tight, n—no visible leakage over a 5-min
This specification is under the jurisdiction ofASTM Committee F25 on Ships
period using either water submersion or the application of
and Marine Technology and is under the direct responsibility of Subcommittee
bubble fluid for detection.
F25.11 on Machinery and Piping Systems.
Current edition approved May 1, 2019. Published June 2019. Originally
3.1.3 external leakage, n—leakagefromthemanifoldwhich
approved in 1996. Last previous edition approved in 2013 as F1685–00 (2013).
escapes to atmosphere.
DOI: 10.1520/F1685-00R19.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.1.4 flow rate demand, n—theamountofflowdemandedat
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
any given time by the system downstream of the manifold.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Available from American Society of Mechanical Engineers (ASME), ASME
International Headquarters, Two Park Ave., New York, NY 10016-5990, http:// Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
www.asme.org. Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1685 − 00 (2019)
FIG. 1 Manifold Configuration
FIG. 2 Manifold Configuration
3.1.5 flow rate demand range, n—the range over which the including the seats of the outlet stop valve and bypass throttle
flow demand can vary. valve. The outlet pressure rating is applicable from the outlet
side of the seats of the outlet stop valve to the manifold outlet
3.1.6 hydrostatic shell test pressures, n—thehydrostatictest
and the bypass throttle valve to the manifold outlet.
pressures that the inlet and outlet sections of the manifold are
required to withstand without damage. Manifold operation is 3.1.10 manual valves, n—these are all the manually oper-
not required during application of shell test pressure, but the ated valves in the manifold which include handwheel-operated
manifold must meet all performance requirements after the valves and wrench-operated valves. The handwheel-operated
shell test pressure has been removed. valves are the inlet and outlet stop valves, and the bypass
throttle valve. The wrench-operated valves are the upstream
3.1.7 inlet operating pressure range, n—the range over
anddownstreambleedvalvesandthegageisolationvalve.The
which the inlet pressure supplied to the manifold can vary
requirements for any manually operated valves installed in the
under any operational conditions which the manifold can be
pressure-reducing valve are covered under 6.5.1.
subjected to in service.
3.1.11 maximum flow rate demand, n—the maximum
3.1.8 internal leakage, n—leakage from higher pressure to
amount of flow demanded of the manifold by the downstream
lower pressure portions of the manifold and which does not
system.
escape to atmosphere.
3.1.12 maximum inlet operating pressure, n—the highest
3.1.9 manifold rated pressures, n—the inlet and outlet
pressure supplied to the inlet of the manifold in service.
pressure ratings of the manifold. These rated pressures are
selected from the applicable pressure ratings (see 4.2) and 3.1.13 maximum outlet operating pressure, n—the highest
specified in the ordering information (see Section 5). The inlet pressureatthemanifoldoutletinservice.Thisisestablishedby
pressure rating is applicable from the manifold inlet up to and the accumulation pressure of the pressure-relief valve.
F1685 − 00 (2019)
TABLE 1 Manifold Inlet and Outlet End Connections
3.1.14 maximum set pressure, n—the highest set pressure at
which the manifold can meet the performance requirements Type of End Connection Pressure Rating, Applicable
lb/in (MPa) Documents
specified.
A
Union, silver-brazed 400 (2.8) MIL-F-1183 (O-ring type)
3.1.15 minimum flow rate demand, n—the minimum flow A
Union, silver-brazed 1500 (10.3) 803-1385946
A
Union, silver-brazed 3000 (20.5) 803-1385943
rate demanded of the manifold by the downstream system.
A
Union, butt/socket 6000 (41.4) 803-1385884
3.1.16 minimum inlet operating pressure, n—the lowest weld
As specified As specified As specified
pressure supplied to the inlet of the manifold in service.
A
Only the pertinent dimensions listed in the applicable documents applicable to
3.1.17 minimum outlet operating pressure, n—the lowest
the straight thread portion of the thread piece shall apply. Thread pieces shall be
pressureatthemanifoldoutletinservice.Thisisestablishedby secured to the manifold inlet and outlet blocks using straight threads and a O-ring
seal design. For the manifold inlet and outlet connections, unless otherwise
the accuracy of regulation of the pressure-reducing valve.
specified in Section 5 the tail pieces and the union nuts shall not be furnished—
onlythethreadpiecesshallbefurnished.Iftailpiecesandunionnutsarerequired,
3.1.18 minimum set pressure, n—the lowest set pressure at
their materials of construction shall be in accordance with the applicable docu-
which the manifold can meet the performance requirements
ments listed above and shall be specified in Section 5.
specified.
3.1.19 operating pressures, n—the pressures within the
manifold during service.
5.1.2 Size and type of inlet end connection (see 4.3 and
3.1.20 pressure-reducing valve, n—the component of the
6.4.2),
manifold which accomplishes automatic regulation of the
5.1.3 Size and type of outlet end connection (see 4.3 and
downstreampressure.Inthiscomponent,theupstreampressure
6.4.2),
is reduced to the desired downstream pressure.
5.1.4 Size and type of end connections for pressure-
3.1.21 pressure-relief valve, n—the component of the mani-
reducing valve and pressure-relief valve,
fold which protects the manifold and downstream systems
5.1.5 If tail pieces and union nuts are required (when
against downstream over pressurization.
required, their material of construction shall be in accordance
with Table 1),
3.1.22 set pressure, n—the outlet pressure delivered by the
5.1.6 Manifold configuration, inlet and outlet pressure rat-
manifold at the time the pressure setting is made. For the
ings (see 4.1 and 4.2),
purposes of this specification, it will be assumed that the
5.1.7 Manifold inlet operating pressure range,
setting is made when there is no flow demand on the manifold
5.1.8 Type of mounting required: bottom or back mounting
(“lock-up” condition), and the manifold is at surrounding
(see 6.4.3),
ambient temperature.
5.1.9 Set pressure and set pressure range, if other than
3.1.23 set pressure range, n—therangeofsetpressuresover
specified (see 7.3),
which the manifold can be adjusted while meeting the perfor-
5.1.10 Flow rate demand range (see 7.1, S1.1.6),
mance requirements specified.
5.1.11 Accuracy of regulation required, if other than
3.1.24 wide open capacity, n—the flow rate when a valve is
specified, or if set pressure is below 10 psig (see 7.2),
in a position which presents the least resistance to flow.
5.1.12 Relief valve set pressure and accumulation pressure
(if different from Specification F1508),
4. Classification
5.1.13 Ambient atmospheric conditions: temperature range,
chemical contaminants, if any,
4.1 Configuration—Manifolds shall be of the following
5.1.14 Quality of inlet air/nitrogen gas: temperature range,
configurations and specified in the ordering information (see
moisture content, oil/lubricant contaminants, if any,
5.1).
5.1.15 Special tools required (see 6.7),
Configuration 1-1 One reducer, one relief (see Fig. 1).
5.1.16 Tamper-proof lead seal if required (see Specification
Configuration 2-1 Two reducers, one relief (see Fig. 2).
F1795, Section 5),
4.2 Pressure Ratings—Manifolds shall have inlet-rated
5.1.17 Supplementaryrequirements,ifany(S1throughS4),
pressures and outlet-rated pressures selected from the follow-
and
ing categories: 400-, 1500-, 3000-, and 6000-psig (2.8-, 10.3-,
5.1.18 Maximumvibrationfrequency,ifotherthanspecified
20.7-, and 41.4-MPa gage pressure). The inlet and outlet
(see S1.1.9).
pressure ratings selected shall be specified in Section 5.
6. Manifold Construction
4.3 End Connections—Manifolds shall have inlet and outlet
end connections selected from those listed in Table 1 and
6.1 Manifoldsshallincorporatethedesignfeaturesspecified
specified in Section 5.
in 6.2 – 6.11.
6.2 Materials of Construction—Material requirements for
5. Ordering Information
the assemblies in the manifold shall be as specified in the
5.1 Ordering documentation for manifolds under this speci-
applicable component specifications referenced herein. Mate-
ficationshallincludethefollowinginformation,asrequired,to rials for all other parts, including the inlet and outlet manifold
describe the equipment adequately:
blocks, shall be 300 series corrosion-resistant steel (SS304,
5.1.1 ASTM designation and year of issue, 304L, 316, or 316L) or other materials selected to provide
F1685 − 00 (2019)
weldability and corrosion resistance without requiring 6.4 Design Construction Requirements:
painting, coating, or plating. The inlet and outlet manifold
6.4.1 Pressure Envelope—The hydrostatic shell test pres-
blocks shall be weld repairable. Materials for contacting parts
sures shall be 1.5 times the manifold rated inlet and outlet
shallbeselectedtominimizeelectrolyticcorrosionandgalling.
pressures.
Metallic materials shall conform to applicable ASTM specifi-
6.4.2 Connections—The main-line inlet and outlet connec-
cations. Nonmetallic materials shall be compatible with the
tions of the manifold, the inlet and outlet connections of the
line medium.
pressure-reducingvalve(s),theconnectionsforthebypassline,
6.3 General Requirements—Manifolds shall incorporate the
and the inlet and outlet connection to the pressure-relief valve
functional elements shown schematically inFig. 1 or Fig. 2,as
shall be takedown joints (unions or other as specified) as
applicable, and delineated below:
specified in Table 1 based on rated pressures specified. Any
(1)Inlet and outlet stop valves,
exposedthreadsshallbeprotectedbyplasticcapsforshipping.
(2)Upstream and downstream bleed valves (for depressur-
The main-line inlet and outlet connection of the manifold and
ization of all components and fluid cavities),
the inlet and outlet connection for the pressure-reducing
(3)Pressure-reducing valve(s),
valve(s) shall permit axial adjustment to expedite proper
(4)Pressure-relief valve,
installation of the manifold into the piping system and to
(5)Gauge isolation valve, and
facilitate replacement of the pressure-reducing valve(s) with
(6)Bypass throttle valve.
one of another make or model or which is for some other
All components shall be part of a manifold assembly, as
reason not dimensionally identical to the originally installed
shown in Fig. 3 or Fig. 4, as applicable, which requires only
pressure-reducing valve(s). The axial adjustment feature for
oneinletandoneoutletconnectiontothemainflowpathofthe
the pressure-reducing valve(s) shall be included in that portion
piping system in which it is installed. The inlet and outlet
ofthetakedownjointsthatareconnectedtotheinletandoutlet
connections shall be in-line. The manifold shall be fabricated
manifold blocks. If unions in accordance with Table 1 are
from inlet and outlet blocks, with interconnecting piping for
specified for the pressure-reducing valve(s) inlet and outlet
the pressure-reducing valve(s) and bypass throttle valve flow
connections, the thread pieces shall be the portions of the
paths. The manual valves shall be cartridge mounted into the
unions that are attached to the pressure-reducing v
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