ASTM F1020-86(2022)

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: F1020 −86 (Reapproved 2022) An American National Standard
Standard Specification for
Line-Blind Valves for Marine Applications
This standard is issued under the fixed designation F1020; 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 MSS Standards:
SP-6Finish for Contact Faces of Pipe Flanges and Connect-
1.1 This specification provides the minimum requirements
ing End Flanges of Valves and Fittings
fordesignfabrication,pressurerating,andtestingforline-blind
SP-25Marking System for Valves, Fittings, Flanges, and
valves.
Unions
1.2 The values stated in inch-pound units are to be regarded
SP-55 Quality Standard for Steel Castings for Valves,
as standard. The values given in parentheses are mathematical
Flanges and Fittings, and Other Piping Components (Vi-
conversions to SI units that are provided for information only
sual Method)
and are not considered standard.
2.4 ASME Standards:
1.3 The following safety hazards caveat pertains only to the
ASME Boiler and Pressure Vessel Code Sections II, VIII,
test methods portion, Section 5, of this specification: This
IX
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user
3. Terminology
of this standard to establish appropriate safety, health, and
3.1 Definitions of Terms Specific to This Standard:
environmental practices and determine the applicability of
3.1.1 blank, n—a solid one-piece circular unit inserted into
regulatory limitations prior to use.
a pipeline to prevent flow.
1.4 This international standard was developed in accor-
3.1.2 line-blind valve, n—an assembly consisting of a spec-
dance with internationally recognized principles on standard-
tacle plate, bolting, and body, the purpose of which is to
ization established in the Decision on Principles for the
provideaconvenientmeanstoalignapipingsystemtoanopen
Development of International Standards, Guides and Recom-
orpositivelyclosedconfiguration.Theassemblyisdesignedto
mendations issued by the World Trade Organization Technical
provide a simplified method of changing over the flow control
Barriers to Trade (TBT) Committee.
spectacle plate without the necessity of plate removal from the
valve body.
2. Referenced Documents
3.1.3 spectacle plate (also spectacle blind), n—a figure-
2.1 ASTM Standards:
eight-shaped unit with one end open for flow and the other
A53/A53MSpecification for Pipe, Steel, Black and Hot-
solid to prevent flow.
Dipped, Zinc-Coated, Welded and Seamless
2.2 ANSI Standards:
4. Materials and Manufacture
B16.5PipeFlangesandFlangedFittings,Steel-NickelAlloy
4.1 Materials:
and Other Special Alloys
4.1.1 Materials for spectacle plates, bolting, and body shall
B31.1Power Piping
be those contained in ASME Section II. For the purpose of
stress calculations, ASME Section VIII values shall be used.
4.1.2 Allweldingshallbedonewithproceduresandwelders
qualified in accordance withASME Section IX and 80% weld
This specification is under the jurisdiction ofASTM Committee F25 on Ships
efficiency factor shall be used.
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
4.1.3 All castings shall be visually inspected and acceptable
Machinery and Piping Systems.
Current edition approved Oct. 1, 2022. Published October 2022. Originally
in accordance with MSS-SP-55.
approved in 1986. Last previous edition approved in 2018 as F1020–86 (2018).
DOI: 10.1520/F1020-86R22.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
Standards volume information, refer to the standard’s Document Summary page on Industry(MSS),127ParkSt.,NE,Vienna,VA22180-4602,http://www.mss-hq.org.
the ASTM website. Available from American Society of Mechanical Engineers (ASME), ASME
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St., International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
4th Floor, New York, NY 10036, http://www.ansi.org. www.asme.org.
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F1020 − 86 (2022)
4 4
4.2 Manufacture:
Z = Π((D − D )/D )/32,
o i o
4.2.1 The spectacle plate shall be designed in accordance
D = D −2t ,
i o p
with ANSI B31.1, Paragraph 104.5.3.
t = PD /(2(0.875)(S)),butnotlessthan0.25in.(6.4mm),
p o
4.2.2 The calculations of 4.2.3 and 4.2.4 shall ensure that a and
3 3 2 2
line blind is designed for the gasket material, of all that can be d = C/Π + 2((G − G )/(G
...