ASTM D5421-15

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 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, and D4097.  
1.5 Selection of gaskets is not covered in this specification, refer to the manufacturer's recommendation.  
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 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.  
Note 1: There is no known ISO equivalent to this standard.

General Information

• Status: Historical
• Publication Date: 30-Apr-2015
• ICS: 23.040.60 - Flanges, couplings and joints
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.23 - Reinforced Thermosetting Resin Piping Systems and Chemical Equipment

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: D5421 − 15
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* 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 This specification covers circular contact-molded fiber-
C582 Specification for Contact-Molded Reinforced Thermo-
glass reinforced-thermosetting-resin flanges for use in pipe
setting Plastic (RTP) Laminates for Corrosion-Resistant
systems and tank nozzles. Included are requirements for
Equipment
materials, workmanship, performance, and dimensions.
D883 Terminology Relating to Plastics
1.2 Flanges (see Fig. 1) may be produced as integral flanges,
D1599 Test Method for Resistance to Short-Time Hydraulic
Type A, or flange-on-pipe, Type B.
Pressure of Plastic Pipe, Tubing, and Fittings
D1600 Terminology for Abbreviated Terms Relating to Plas-
1.3 This specification is based on flange performance and
tics
does not cover design.
D2996 Specification for Filament-Wound “Fiberglass”
1.4 These flanges are designed for use with pipe and tanks
(Glass-Fiber-Reinforced Thermosetting-Resin) Pipe
that are manufactured to Specifications D2996, D2997, D3262,
D2997 Specification for Centrifugally Cast “Fiberglass”
D3299, D3517, D3754, and D4097.
(Glass-Fiber-Reinforced Thermosetting-Resin) Pipe
D3262 Specification for “Fiberglass” (Glass-Fiber-
1.5 Selection of gaskets is not covered in this specification,
Reinforced Thermosetting-Resin) Sewer Pipe
refer to the manufacturer’s recommendation.
D3299 Specification for Filament-Wound Glass-Fiber-
1.6 The values stated in inch-pound units are to be regarded
Reinforced Thermoset Resin Corrosion-Resistant Tanks
as the standard. The SI units given in parentheses are for
D3517 Specification for “Fiberglass” (Glass-Fiber-
information only.
Reinforced Thermosetting-Resin) Pressure Pipe
D3754 Specification for “Fiberglass” (Glass-Fiber-
1.7 The following precautionary caveat pertains only to the
Reinforced Thermosetting-Resin) Sewer and Industrial
test methods portion, Section 9, of this specification: This
Pressure Pipe
standard does not purport to address all of the safety concerns,
D4097 Specification for Contact-Molded Glass-Fiber-
if any, associated with its use. It is the responsibility of the user
Reinforced Thermoset Resin Corrosion-Resistant Tanks
of this standard to establish appropriate safety, health, and
3
environmental practices and determine the applicability of 2.2 ASME Standards:
B 16.1 Cast Iron Pipe Flanges and Flanged Fittings
regulatory limitations prior to use.
B 16.5 Pipe Flanges and Flanged Fittings
NOTE 1—There is no known ISO equivalent to this standard.
B 18.21.1 Type “A” Narrow Washers
1.8 This international standard was developed in accor-
dance with internationally recognized principles on standard- 3. Terminology
ization established in the Decision on Principles for the
3.1 Definitions:
Development of International Standards, Guides and Recom-
3.1.1 Definitions are in accordance with Terminology D883.
mendations issued by the World Trade Organization Technical
Abbreviations are in accordance with Terminology D1600,
Barriers to Trade (TBT) Committee.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
This specification is under the jurisdiction of ASTM Committee D20 on contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Plastics and is the direct responsibility of Subcommittee D20.23 on Reinforced Standards volume information, refer to the standard’s Document Summary page on
Plastic Piping Systems and Chemical Equipment. the ASTM website.
3
Current edition approved May 1, 2015. Published June 2015. Originally Available from American Society of Mechanical Engineers (ASME), ASME
approved in 1993. Last previous edition approve in 2010 as D5421 – 05(2010). International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
DOI: 10.1520/D5421-15. www.asme.org.
*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
1

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D5421 − 15
TABLE 1 Pressure Categories
A
Pressure Rating
Designation
psi MPa
A 25 0.173
B 50 0.345
C 75 0.517
D 100 0.690
E 125 0.862
F 150 1.034
A
Flanges with higher pressure ratings are available by agreement between the
purchaser and the manufacturer.
FIG. 1 Flange Types
4.1.5 Short-term rupture pressure
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5421 − 05 (Reapproved 2010) D5421 − 15 An American National Standard
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 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.
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 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.
NOTE 1—There is no known ISO equivalent to this standard.
2. Referenced Documents
2
2.1 ASTM Standards:
C582 Specification for Contact-Molded Reinforced Thermosetting Plastic (RTP) Laminates for Corrosion-Resistant Equipment
D883 Terminology Relating to Plastics
D1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings
D1600 Terminology for Abbreviated Terms Relating to Plastics
D2310 Classification for Machine-Made “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe
D2996 Specification for Filament-Wound “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe
D2997 Specification for Centrifugally Cast “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe
D3262 Specification for “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Sewer Pipe
D3299 Specification for Filament-Wound Glass-Fiber-Reinforced Thermoset Resin Corrosion-Resistant Tanks
D3517 Specification for “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pressure Pipe
D3754 Specification for “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Sewer and Industrial Pressure Pipe
D3982 Specification for Contact Molded “Fiberglass” (Glass Fiber Reinforced Thermosetting Resin) Ducts
D4097 Specification for Contact-Molded Glass-Fiber-Reinforced Thermoset Resin Corrosion-Resistant Tanks
3
2.2 ANSIASME Standards:
B 16.1 Cast Iron Pipe Flanges and Flanged Fittings
B 16.5 Pipe Flanges and Flanged Fittings
1
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.23 on Reinforced Plastic Piping
Systems and Chemical Equipment.
Current edition approved Nov. 1, 2010May 1, 2015. Published March 2011June 2015. Originally approved in 1993. Last previous edition approve in 20052010 as
D5421 - 05.D5421 – 05(2010). DOI: 10.1520/D5421-05R10.10.1520/D5421-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, Society of Mechanical Engineers (ASME), ASME International Headquarters,
Two Park Ave., New York, NY 10036, http://www.ansi.org.10016-5990, http://www.asme.org.
*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
1

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D5421 − 15
FIG. 1 Flange Types
B 27.2B 18.21.1 Type “A” Narrow Washers
3. Terminology
3.1 Definitions:
3.1.1 Definitions are in accordance with Terminology D883. Abbreviations
...