ASTM D5421-93
(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
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 Fig. 1 ) 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 D2996, D2997, D3262, D3299, D3517, D3754, D3982, and D4097.
1.5 Selection of gaskets is not covered in this specification, refer to the manufacturer's recommendation.
Note 1--ISO 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.
The following precautionary caveat pertains only to the test methods portion, Section 9, 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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Designation: D 5421 – 93
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Contact Molded “Fiberglass” (Glass-Fiber-Reinforced
1
Thermosetting Resin) Flanges
This standard is issued under the fixed designation D 5421; 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
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 (see Fig. 1) 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
FIG. 1 Flange Types
that are manufactured to Specifications D 2996, D 2997,
D 3262, D 3299, D 3517, D 3754, D 3982, and D 4097.
D 2563 Practice for Classifying Visual Defects in Glass-
1.5 Selection of gaskets is not covered in this specification,
4
Reinforced Plastic Laminate Parts
refer to the manufacturer’s recommendation.
D 2996 Specification for Filament Wound “Fiberglass”
NOTE 1—ISO Equivalent—There is no similar or equivalent ISO
2
(Glass-Fiber-Reinforced Thermosetting Resin Pipe)
standard.
D 2997 Specification for Centrifugally Cast “Fiberglass”
2
1.6 The values stated in inch-pound units are to be regarded
(Glass-Fiber-Reinforced Thermosetting Resin Pipe)
as the standard. The SI units given in parentheses are for
D 3262 Specification for Reinforced Plastic Mortar Sewer
2
information only.
Pipe
1.7 The following precautionary caveat pertains only to the
D 3299 Specification for Filament Wound Glass-Fiber-
2
test methods portion, Section 9, of this specification: This
Reinforced Thermoset Resin Chemical-Resistant Tanks
standard does not purport to address the safety problems, if
D 3517 Specification for “Fiberglass” (Glass-Fiber-
2
any, associated with its use. It is the responsibility of the user
Reinforced Thermosetting Resin) Pressure Pipe
of this standard to establish appropriate safety and health
D 3754 Specification for Fiberglass Sewer and Industrial
2
practices and determine the applicability of regulatory limita-
Pressure Pipe
tions prior to use.
D 3982 Specification for Custom Contact-PressureMolded-
2
Glass-Fiber-Reinforced Thermosetting Resin Hoods
2. Referenced Documents
D 4097 Specification for Contact Molded Glass-Fiber-
2.1 ASTM Standards: 2
Reinforced Thermoset Resin Chemical Resistant Tanks
C 582 Specification for Contact-Molded Reinforced Ther- 2
F 412 Terminology Relating to Plastic Piping Systems
mosetting Plastic (RTP) Laminates for Corrosion Resistant 5
F 436 Specification for Hardened Steel Washers
2
Equipment
2.2 ANSI Standards:
3
6
D 883 Terminology Relating to Plastics
B 16.1 Cast Iron Pipe Flanges and Flanged Fittings
D 1599 Test Method for Short-Time Hydraulic Failure Pres- 6
B 16.5 Pipe Flanges and Flanged Fittings
2
6
sure of Plastic Pipe, Tubing, and Fittings
B 27.2 Type “A” Narrow Washers
D 1600 Terminology Relating to Abbreviated Terms Relat-
3
ing to Plastics 3. Terminology
3.1 Definitions:
1
This specification is under the jurisdiction of ASTM Committee D-20 on
Plastics and is the direct responsibility of Subcommittee D20.23 on Reinforced
4
Plastic Piping Systems and Chemical Equipment. Annual Book of ASTM Standards, Vol 08.02.
5
Current edition approved June 15, 1993. Published August 1993. Annual Book of ASTM Standards, Vol 15.08.
2 6
Annual Book of ASTM Standards, Vol 08.04. Available from American National Standards Institute, 11 West 42nd Street,
3
Annual Book of ASTM Standards, Vol 08.01. 13th Floor, NY, NY 10036.
1
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D 5421
TABLE 1 Pressure Categories
3.1.1 Definitions are in accordance with Terminology
A
D 883. Abbreviations are in accordance with Terminology Pressure Rating
Designation
D 1600, unless otherwise indicated. The abbreviation for
psi MPa
reinforced-thermosetting-resin pipe is RTRP.
A 25 0.173
3.2 Descriptions of Terms Specific to This Standard: De- B 50 0.345
C 75 0.517
scriptions of Terms Specific to This Standard:
D 100 0.690
3.2.1 contact molding (CM)—a method of fabrication
E 125 0.862
F 150 1.034
wherein the glass fiber reinforcement is applied to the mold in
A
the form of all chopped-strand mat or chopped-strand mat and
Flanges with higher pressure ratings are available by agreement between the
purchaser and the manufacturer.
woven roving,
...
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