ASTM D3681-23
(Test Method)Standard Test Method for Chemical Resistance of “Fiberglass” (Glass–Fiber–Reinforced Thermosetting-Resin) Pipe in a Deflected Condition
Standard Test Method for Chemical Resistance of “Fiberglass” (Glass–Fiber–Reinforced Thermosetting-Resin) Pipe in a Deflected Condition
SIGNIFICANCE AND USE
5.1 This test method evaluates the effect of a chemical environment on pipe when in a deflected condition. 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 4: 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 the procedure for determining the chemical-resistant properties of fiberglass pipe in a deflected condition for diameters 4 in. (102 mm) and larger. Both glass–fiber–reinforced thermosetting resin pipe (RTRP) and glass–fiber–reinforced polymer mortar pipe (RPMP) are fiberglass pipes.
Note 1: For the purposes for this standard, polymer does not include natural polymers.
1.2 Inch-pound units are to be regarded as the standard. The values 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. Specific precautionary statements are given in 9.5.
Note 2: 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
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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: D3681 − 23
Standard Test Method for
Chemical Resistance of “Fiberglass”
(Glass–Fiber–Reinforced Thermosetting-Resin) Pipe in a
1
Deflected Condition
This standard is issued under the fixed designation D3681; 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* D3567 Practice for Determining Dimensions of “Fiberglass”
(Glass-Fiber-Reinforced Thermosetting Resin) Pipe and
1.1 This test method covers the procedure for determining
Fittings
the chemical-resistant properties of fiberglass pipe in a de-
flected condition for diameters 4 in. (102 mm) and larger. Both
3. Terminology
glass–fiber–reinforced thermosetting resin pipe (RTRP) and
glass–fiber–reinforced polymer mortar pipe (RPMP) are fiber-
3.1 Definitions:
glass pipes.
3.1.1 General—Definitions are in accordance with Termi-
nology D883 and abbreviations are in accordance with Termi-
NOTE 1—For the purposes for this standard, polymer does not include
nology D1600 unless otherwise indicated.
natural polymers.
1.2 Inch-pound units are to be regarded as the standard. The 3.2 Definitions of Terms Specific to This Standard:
values given in parentheses are for information only. 3.2.1 end point—the passage of the fluid through the pipe
wall unless otherwise stated. The failure mode may be
1.3 This standard does not purport to address all of the
catastrophic, characterized by a sudden fracture through the
safety concerns, if any, associated with its use. It is the
pipe wall in the area of greatest strain, parallel to the axis of the
responsibility of the user of this standard to establish appro-
pipe, with the fiber reinforcement cleanly broken at the edge of
priate safety, health, and environmental practices and deter-
the fracture. Visual evidence of surface etching or pitting may
mine the applicability of regulatory limitations prior to use.
or may not be present.
Specific precautionary statements are given in 9.5.
3.2.2 fiberglass pipe—tubular product containing glass fiber
NOTE 2—There is no known ISO equivalent to this standard.
reinforcements embedded in or surrounded by cured thermo-
1.4 This international standard was developed in accor-
setting resin. The composite structure may contain aggregate,
dance with internationally recognized principles on standard-
granular or platelet fillers, thixotropic agents, pigments, or
ization established in the Decision on Principles for the
dyes. Thermoplastic or thermosetting liners or coatings may be
Development of International Standards, Guides and Recom-
included.
mendations issued by the World Trade Organization Technical
3.2.3 reinforced polymer mortar pipe (RPMP)—fiberglass
Barriers to Trade (TBT) Committee.
pipe with aggregate.
2. Referenced Documents
3.2.4 reinforced thermosetting resin pipe (RTRP)—
2
fiberglass pipe without aggregate.
2.1 ASTM Standards:
D883 Terminology Relating to Plastics
3.2.5 strain-corrosion—the failure of the pipe wall caused
D1600 Terminology for Abbreviated Terms Relating to Plas-
by the exposure of the inside surface, while in a strained
tics
condition, to a corrosive environment for a period of time.
4. Summary of Test Method
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 Thermoset-
4.1 This test method consists of exposing the interior of a
ting Resin Piping Systems and Chemical Equipment.
minimum of 18 specimens of pipe to a corrosive test solution
Current edition approved July 1, 2023. Published July 2023. Originally approved
while the pipe is constantly maintained in a deflected condition
in 1978. Last previous edition approved in 2018 as D3681 – 18. DOI: 10.1520/
D3681-23.
at differing induced initial ring flexural strain levels, and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
measuring the time to failure for each strain level. Test
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
temperatures are obtained by testing in an air environment
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. where the temperature is controlled.
*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
---------------------- Page: 1 ----------------------
D3681 − 23
4.2 The long-term resistance of the pipe
...
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: D3681 − 18 D3681 − 23
Standard Test Method for
Chemical Resistance of “Fiberglass”
(Glass–Fiber–Reinforced Thermosetting-Resin) Pipe in a
1
Deflected Condition
This standard is issued under the fixed designation D3681; 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 the procedure for determining the chemical-resistant properties of fiberglass pipe in a deflected
condition for diameters 4 in. (102 mm) and larger. Both glass–fiber–reinforced thermosetting resin pipe (RTRP) and
glass–fiber–reinforced polymer mortar pipe (RPMP) are fiberglass pipes.
NOTE 1—For the purposes for this standard, polymer does not include natural polymers.
1.2 Inch-pound units are to be regarded as the standard. The values 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. Specific precautionary statements are given in 9.5.
NOTE 2—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:
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 1978. Last previous edition approved in 20122018 as
ɛ1
D3681 – 12D3681 – 18. . DOI: 10.1520/D3681-18.10.1520/D3681-23.
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 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
---------------------- Page: 1 ----------------------
D3681 − 23
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:
3.2.1 end point—the passage of the fluid through the pipe wall unless otherwise stated. The failure mode may be catastrophic,
characterized by a sudden fracture through the pipe wall in the area of greatest strain, parallel to the axis of the pipe, with the fiber
reinforcement cleanly broken at the edge of the fracture. Visual evidence of surface etching or pitting may or may not be present.
3.2.2 fiberglass pipe—tubular product containing glass fiber reinforcements embedded in or surrounded by cured 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.
3.2.5 strain-corrosion—the failure of the pipe wall caused by the exposure of the inside surface, while in a strained condition, to
a corrosive environment for a period of time.
4. Summary of Test Method
4.1 This test method consists of exposing the interior of a minimum of 18 specimens of pipe to a corrosive test solution while the
pipe is constantly maintained in a deflected condition at differing induced initial ring flexural strain levels, and measuring the time
t
...
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