ASTM D5365-23

Standard Test Method for Long-Term Ring-Bending Strain of “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe

SIGNIFICANCE AND USE
5.1 This test method determines the long-term ring-bending strain of pipe when deflected under constant load and immersed in a chemical environment. It has been found that effects of chemical environments can be accelerated by strain induced by deflection. This information is useful and necessary for the design and application of buried fiberglass pipe.  
Note 3: Pipe of the same diameter but of different wall thicknesses will develop different strains with the same deflection. Also, pipes having the same wall thickness but different constructions making up the wall may develop different strains with the same deflection.
SCOPE
1.1 This test method covers a procedure for determining the long-term ring-bending strain (Sb) of “fiberglass” pipe. Both glass-fiber-reinforced thermosetting-resin pipe (RTRP) and glass-fiber-reinforced polymer mortar pipe (RPMP) are “fiberglass” pipes.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information only.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. A specific warning statement is given in 9.5.
Note 1: There is no known ISO equivalent to this standard.  
1.4 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

• Status: Published
• Publication Date: 30-Jun-2023
• ICS: 23.040.20 - Plastics pipes
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.23 - Reinforced Thermosetting Resin Piping Systems and Chemical Equipment

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: D5365 − 23
Standard Test Method for
Long-Term Ring-Bending Strain of “Fiberglass” (Glass-
1
Fiber-Reinforced Thermosetting-Resin) Pipe
This standard is issued under the fixed designation D5365; 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* 3. Terminology
1.1 This test method covers a procedure for determining the 3.1 Definitions:
long-term ring-bending strain (S ) of “fiberglass” pipe. Both 3.1.1 General—Definitions are in accordance with Termi-
b
glass-fiber-reinforced thermosetting-resin pipe (RTRP) and nology D883 and abbreviations are in accordance with Termi-
glass-fiber-reinforced polymer mortar pipe (RPMP) are “fiber- nology D1600 unless otherwise indicated.
glass” pipes. 3.2 Definitions of Terms Specific to This Standard:
3.2.1 end point—the failure of the test specimen. The failure
1.2 The values stated in inch-pound units are to be regarded
mode may be catastrophic, characterized by a sudden fracture
as the standard. The SI units given in parentheses are for
through the pipe wall in the area of greatest strain.
information only.
3.2.2 fiberglass pipe—tubular product containing glass-fiber
1.3 This standard does not purport to address all of the
reinforcements embedded in or surrounded by curing thermo-
safety concerns, if any, associated with its use. It is the
setting resin. The composite structure may contain aggregate,
responsibility of the user of this standard to establish appro-
granular or platelet fillers, thixotropic agents, pigments, or
priate safety, health, and environmental practices and deter-
dyes; thermoplastic or thermosetting liners or coatings may be
mine the applicability of regulatory limitations prior to use. A
included.
specific warning statement is given in 9.5.
3.2.3 reinforced polymer mortar pipe (RPMP)—fiberglass
NOTE 1—There is no known ISO equivalent to this standard.
pipe with aggregate.
1.4 This international standard was developed in accor-
3.2.4 reinforced thermosetting resin pipe (RTRP)—
dance with internationally recognized principles on standard-
fiberglass pipe without aggregate.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Summary of Test Method
mendations issued by the World Trade Organization Technical
4.1 This test method consists of subjecting submerged-pipe
Barriers to Trade (TBT) Committee.
ring specimens to various increasing deflections induced by a
constant load and monitoring the time to failure. A minimum of
2. Referenced Documents
18 samples are required. Test temperatures are obtained by
2
2.1 ASTM Standards:
testing in a fluid environment where the temperature is
D883 Terminology Relating to Plastics
controlled.
D1600 Terminology for Abbreviated Terms Relating to Plas-
4.2 The long-term ring-bending strain is obtained by an
tics
extrapolation to 50 years of a log-log linear regression line for
D3567 Practice for Determining Dimensions of “Fiberglass”
failure strain versus time.
(Glass-Fiber-Reinforced Thermosetting Resin) Pipe and
Fittings
NOTE 2—It is the consensus of Subcommittee D20.23 that the log-log
linear regression analysis of test data is a conservative approach and is
representative of standard industry practice.
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics
5. Significance and Use
and is the direct responsibility of Subcommittee D20.23 on Reinforced Thermoset-
ting Resin Piping Systems and Chemical Equipment.
5.1 This test method determines the long-term ring-bending
Current edition approved July 1, 2023. Published July 2023. Originally approved
strain of pipe when deflected under constant load and im-
in 1993. Last previous edition approved in 2018 as D5365 - 18. DOI: 10.1520/
D5365-23.
mersed in a chemical environment. It has been found that
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
effects of chemical environments can be accelerated by strain
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
induced by deflection. This information is useful and necessary
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. for the design and application of buried fiberglass pipe.
*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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...

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: D5365 − 18 D5365 − 23
Standard Test Method for
Long-Term Ring-Bending Strain of “Fiberglass” (Glass-
1
Fiber-Reinforced Thermosetting-Resin) Pipe
This standard is issued under the fixed designation D5365; 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 test method covers a procedure for determining the long-term ring-bending strain (S ) of “fiberglass” pipe. Both
b
glass-fiber-reinforced thermosetting-resin pipe (RTRP) and glass-fiber-reinforced polymer mortar pipe (RPMP) are “fiberglass”
pipes.
1.2 The values stated in inch-pound units are to be regarded as the standard. The SI units given in parentheses are for information
only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. A specific warning statement is given in 9.5.
NOTE 1—There is no known ISO equivalent to this standard.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D883 Terminology Relating to Plastics
D1600 Terminology for Abbreviated Terms Relating to Plastics
D3567 Practice for Determining Dimensions of “Fiberglass” (Glass-Fiber-Reinforced Thermosetting Resin) Pipe and Fittings
3. Terminology
3.1 Definitions:
3.1.1 General—Definitions are in accordance with Terminology D883 and abbreviations are in accordance with Terminology
D1600 unless otherwise indicated.
3.2 Definitions of Terms Specific to This Standard:
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.23 on Reinforced Plastic
Thermosetting Resin Piping Systems and Chemical Equipment.
Current edition approved Aug. 1, 2018July 1, 2023. Published August 2018July 2023. Originally approved in 1993. Last previous edition approved in 20122018 as
D5365 - 12.D5365 - 18. DOI: 10.1520/D5365-18.10.1520/D5365-23.
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.
*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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D5365 − 23
3.2.1 end point—the failure of the test specimen. The failure mode may be catastrophic, characterized by a sudden fracture through
the pipe wall in the area of greatest strain.
3.2.2 fiberglass pipe—tubular product containing glass-fiber reinforcements embedded in or surrounded by curing thermosetting
resin. The composite structure may contain aggregate, granular or platelet fillers, thixotropic agents, pigments, or dyes;
thermoplastic or thermosetting liners or coatings may be included.
3.2.3 reinforced polymer mortar pipe (RPMP)—fiberglass pipe with aggregate.
3.2.4 reinforced thermosetting resin pipe (RTRP)—fiberglass pipe without aggregate.
4. Summary of Test Method
4.1 This test method consists of subjecting submerged-pipe ring specimens to various increasing deflections induced by a constant
load and monitoring the time to failure. A minimum of 18 samples are required. Test temperatures are obtained by testing in a fluid
environment where the temperature is controlled.
4.2 The long-term ring-bending strain is obtained by an extrapolation to 50 years of a log-log linear regression line for failure
strain versus time.
NOTE 2—It is the consensus of Subcommittee D20.23 that the log-log linear regression analysis of test data is a conservative approach and is representative
of standard industry practice.
5. Significance and Use
5.1 This test method determines the long-term ring-bending strain of pipe when deflected under constant load and immersed in
a chemi
...