ASTM D5421-05
(Specification)Standard Specification for Contact Molded "Fiberglass" (Glass-Fiber-Reinforced Thermosetting Resin) Flanges
Standard Specification for Contact Molded "Fiberglass" (Glass-Fiber-Reinforced Thermosetting Resin) Flanges
ABSTRACT
This specification covers the requirements for materials, workmanship, performance, and dimensions of circular contact-molded "fiberglass" (glass fiber reinforced thermosetting resin) flanges for use in pipe systems and tank nozzles. This specification does not address flange design or gasket selection. Flanges may be produced as integral flanges (Type A) or flange-on-pipe (Type B). They may be made of either epoxy resin (Grade 1), polyester resin (Grade 2), phenolic resin (Grade 3), vinylester resin (Grade 4), or furan resin (Grade 5). Flanges are also grouped into classes according to pressure and thrust capability as Class I (hoop and axial pressure) and Class II (hoop pressure only). Specimens shall undergo tests for which performance requirements must be met for sealing, short-term rupture strength, and maximum bolt torque.
SCOPE
1.1 This specification covers circular contact-molded fiberglass reinforced-thermosetting-resin flanges for use in pipe systems and tank nozzles. Included are requirements for materials, workmanship, performance, and dimensions.
1.2 Flanges (see ) may be produced as integral flanges, Type A, or flange-on-pipe, Type B.
1.3 This specification is based on flange performance and does not cover design.
1.4 These flanges are designed for use with pipe and tanks that are manufactured to Specifications D 2996, D 2997, D 3262, D 3299, D 3517, D 3754, D 3982, and D 4097.
1.5 Selection of gaskets is not covered in this specification, refer to the manufacturer's recommendation. Note 1ISO Equivalent-There is no similar or equivalent ISO standard.
1.6 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.
1.7 The following precautionary caveat pertains only to the test methods portion, Section , of this specification: This standard does not purport to address the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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An American National Standard
Designation: D5421 – 05
Standard Specification for
Contact Molded “Fiberglass” (Glass-Fiber-Reinforced
1
Thermosetting Resin) Flanges
This standard is issued under the fixed designation D5421; 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*
1.1 This specification covers circular contact-molded fiber-
glass reinforced-thermosetting-resin flanges for use in pipe
systems and tank nozzles. Included are requirements for
materials, workmanship, performance, and dimensions.
1.2 Flanges(seeFig.1)maybeproducedasintegralflanges,
Type A, or flange-on-pipe, Type B.
1.3 This specification is based on flange performance and
does not cover design.
1.4 These flanges are designed for use with pipe and tanks
that are manufactured to Specifications D2996, D2997, D3262,
D3299, D3517, D3754, D3982, and D4097.
FIG. 1 Flange Types
1.5 Selection of gaskets is not covered in this specification,
refer to the manufacturer’s recommendation.
D1599 Test Method for Resistance to Short-Time Hydraulic
NOTE 1—ISO Equivalent—There is no similar or equivalent ISO
Pressure of Plastic Pipe, Tubing, and Fittings
standard.
D1600 Terminology for Abbreviated Terms Relating to
1.6 The values stated in inch-pound units are to be regarded
Plastics
as the standard. The SI units given in parentheses are for
D2310 Classification for Machine-Made “Fiberglass”
information only.
(Glass-Fiber-Reinforced Thermosetting-Resin) Pipe
1.7 The following precautionary caveat pertains only to the
D2996 Specification for Filament-Wound “Fiberglass’’
test methods portion, Section 9, of this specification: This
(Glass-Fiber-Reinforced Thermosetting-Resin) Pipe
standard does not purport to address the safety problems, if
D2997 Specification for Centrifugally Cast “Fiberglass”
any, associated with its use. It is the responsibility of the user
(Glass-Fiber-Reinforced Thermosetting-Resin) Pipe
of this standard to establish appropriate safety and health
D3262 Specification for “Fiberglass” (Glass-Fiber-
practices and determine the applicability of regulatory limita-
Reinforced Thermosetting-Resin) Sewer Pipe
tions prior to use.
D3299 Specification for Filament-Wound Glass-Fiber-
Reinforced Thermoset Resin Corrosion-Resistant Tanks
2. Referenced Documents
D3517 Specification for “Fiberglass” (Glass-Fiber-
2
2.1 ASTM Standards:
Reinforced Thermosetting-Resin) Pressure Pipe
C582 Specification for Contact-Molded Reinforced Ther-
D3754 Specification for “Fiberglass” (Glass-Fiber-
mosettingPlastic(RTP)LaminatesforCorrosion-Resistant
Reinforced Thermosetting-Resin) Sewer and Industrial
Equipment
Pressure Pipe
D883 Terminology Relating to Plastics
D3982 Specification for Contact Molded “Fiberglass”
(Glass Fiber Reinforced Thermosetting Resin) Ducts
D4097 Specification for Contact-Molded Glass-Fiber-
1
This specification is under the jurisdiction of ASTM Committee D20 on
Reinforced Thermoset Resin Corrosion-Resistant Tanks
Plastics and is the direct responsibility of Subcommittee D20.23 on Reinforced
2.2 ANSI Standards:
Plastic Piping Systems and Chemical Equipment.
3
Current edition approved July 1, 2005. Published August 2005. Originally
B 16.1 Cast Iron Pipe Flanges and Flanged Fittings
approved in 1993. Last previous edition approve in 2000 as D5421 — 00. DOI: 3
B 16.5 Pipe Flanges and Flanged Fittings
10.1520/D5421-05.
2
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
3
Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute, 11 West 42nd Street,
the ASTM website. 13th Floor, NY, NY 10036.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D5421 – 05
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TABLE 1 Pressure Categories
B 27.2 Type “A” Narrow Washers
A
Pressure Rating
Designation
3. Terminology
psi MPa
3.1 Definitions:
A 25 0.173
3.1.1 Definitions are in accordance withTerminology D883.
B 50 0.345
C 75 0.517
Abbreviations are in accordance with Terminology D1600,
D 100 0.690
unless otherwise indicated. The abbreviation for reinforced-
E 125 0.862
thermosetting-resin pipe is RTRP.
F 150 1.034
A
3.2 Definitions of Terms Specific to This Standard: Descrip-
Flanges with higher pressure ratings are available by agreement between the
purchaser and the manufacturer.
tions of Terms Specific to This Standard:
3.2.1 contact molding (CM)—a method o
...
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