ASTM D2992-18
(Practice)Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings
Standard Practice for Obtaining Hydrostatic or Pressure Design Basis for “Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe and Fittings
SIGNIFICANCE AND USE
5.1 This practice is useful for establishing the hoop stress or internal pressure versus time-to-failure relationships, under selected internal and external environments which simulate actual anticipated product end-use conditions, from which a design basis for specific piping products and materials can be obtained. This practice defines an HDB for material in straight, hollow cylindrical shapes where hoop stress can be easily calculated, and a PDB for fittings and joints where stresses are more complex.
5.1.1 An alternative design practice based on initial strain versus time-to-failure relationships employs a strain basis HDB instead of the stress basis HDB defined by this practice. The strain basis HDB is most often used for buried pipe designs with internal pressures ranging from 0 to 250 psig (1.72 MPa).
5.2 To characterize fiberglass piping products, it is necessary to establish the stress versus cycles or time to failure, or pressure versus cycles or time to failure relationships over three or more logarithmic decades of time (cycles or hours) within controlled environmental parameters. Because of the nature of the test and specimens employed, no single line can adequately represent the data. Therefore, the confidence limits shall be established.
5.3 Pressure ratings for piping of various dimensions at each temperature may be calculated using the HDS determined by testing one size of piping provided that the same specific process and material are used both for test specimens and the piping in question.
5.4 Pressure ratings at each temperature for components other than straight hollow shapes may be calculated using the HDP determined by testing one size of piping provided that (1) the specific materials and manufacturing process used for the test specimens are used for the components, (2) for joints, the joining materials and procedures used to prepare the test specimens are used for field joining, and (3) scaling of critical dimensions is related ...
SCOPE
1.1 This practice establishes two procedures, Procedure A (cyclic) and Procedure B (static), for obtaining a hydrostatic design basis (HDB) or a pressure design basis (PDB) for fiberglass piping products, by evaluating strength-regression data derived from testing pipe or fittings, or both, of the same materials and construction, either separately or in assemblies. Both glass-fiber-reinforced thermosetting-resin pipe (RTRP) and glass-fiber-reinforced polymer mortar pipe (RPMP) are fiberglass pipe.
Note 1: For the purposes of this standard, polymer does not include natural polymers.
1.2 This practice can be used for the HDB determination for fiberglass pipe where the ratio of outside diameter to wall thickness is 10:1 or more.
Note 2: This limitation, based on thin-wall pipe design theory, serves further to limit the application of this practice to internal pressures which, by the hoop-stress equation, are approximately 20 % of the derived hydrostatic design stress (HDS). For example, if HDS is 5000 psi (34 500 kPa), the pipe is limited to about 1000-psig (6900-kPa) internal pressure, regardless of diameter.
1.3 This practice provides a PDB for complex-shaped products or systems where complex stress fields seriously inhibit the use of hoop stress.
1.4 Specimen end closures in the underlying test methods may be either restrained or free, leading to certain limitations.
1.4.1 Restrained Ends—Specimens are stressed by internal pressure only in the hoop direction, and the HDB is applicable for stresses developed only in the hoop direction.
1.4.2 Free Ends—Specimens are stressed by internal pressure in both hoop and longitudinal directions, such that the hoop stress is twice as large as the longitudinal stress. This practice may not be applicable for evaluating stresses induced by loadings where the longitudinal stress exceeds 50 % of the HDS.
1.5 The values stated in inch-pound units are to be regarde...
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Designation: D2992 − 18
Standard Practice for
Obtaining Hydrostatic or Pressure Design Basis for
“Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin)
1
Pipe and Fittings
This standard is issued under the fixed designation D2992; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* practice may not be applicable for evaluating stresses induced
by loadings where the longitudinal stress exceeds 50% of the
1.1 This practice establishes two procedures, Procedure A
HDS.
(cyclic) and Procedure B (static), for obtaining a hydrostatic
1.5 Thevaluesstatedininch-poundunitsaretoberegarded
design basis (HDB) or a pressure design basis (PDB) for
as the standard. The values in parentheses are given for
fiberglass piping products, by evaluating strength-regression
information purposes only.
data derived from testing pipe or fittings, or both, of the same
materials and construction, either separately or in assemblies.
NOTE 3—There is no known ISO equivalent to this standard.
Both glass-fiber-reinforced thermosetting-resin pipe (RTRP)
1.6 This standard does not purport to address all of the
and glass-fiber-reinforced polymer mortar pipe (RPMP) are
safety concerns, if any, associated with its use. It is the
fiberglass pipe.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
NOTE 1—For the purposes of this standard, polymer does not include
natural polymers. mine the applicability of regulatory limitations prior to use.
1.7 This international standard was developed in accor-
1.2 ThispracticecanbeusedfortheHDBdeterminationfor
dance with internationally recognized principles on standard-
fiberglass pipe where the ratio of outside diameter to wall
ization established in the Decision on Principles for the
thickness is 10:1 or more.
Development of International Standards, Guides and Recom-
NOTE 2—This limitation, based on thin-wall pipe design theory, serves
mendations issued by the World Trade Organization Technical
further to limit the application of this practice to internal pressures which,
Barriers to Trade (TBT) Committee.
by the hoop-stress equation, are approximately 20% of the derived
hydrostatic design stress (HDS). For example, if HDS is 5000 psi (34500
2. Referenced Documents
kPa), the pipe is limited to about 1000-psig (6900-kPa) internal pressure,
2
regardless of diameter.
2.1 ASTM Standards:
D618Practice for Conditioning Plastics for Testing
1.3 This practice provides a PDB for complex-shaped prod-
D883Terminology Relating to Plastics
ucts or systems where complex stress fields seriously inhibit
D1598Test Method for Time-to-Failure of Plastic Pipe
the use of hoop stress.
Under Constant Internal Pressure
1.4 Specimen end closures in the underlying test methods
D1599Test Method for Resistance to Short-Time Hydraulic
may be either restrained or free, leading to certain limitations.
Pressure of Plastic Pipe, Tubing, and Fittings
1.4.1 Restrained Ends—Specimens are stressed by internal
D1600TerminologyforAbbreviatedTermsRelatingtoPlas-
pressure only in the hoop direction, and the HDB is applicable
tics
for stresses developed only in the hoop direction.
D2143 Test Method for Cyclic Pressure Strength of
1.4.2 Free Ends—Specimens are stressed by internal pres- Reinforced, Thermosetting Plastic Pipe
sure in both hoop and longitudinal directions, such that the D3567PracticeforDeterminingDimensionsof“Fiberglass”
hoop stress is twice as large as the longitudinal stress. This (Glass-Fiber-Reinforced Thermosetting Resin) Pipe and
Fittings
F412Terminology Relating to Plastic Piping Systems
1
ThispracticeisunderthejurisdictionofASTMCommitteeD20onPlasticsand
is the direct responsibility of Subcommittee D20.23 on Reinforced Plastic Piping
2
Systems and Chemical Equipment. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 15, 2018. Published May 2018. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1971. Last previous edition approved in 2012 as D2992–12. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D2992-18. 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 ----------------------
D2992 − 18
F948Test Method for Time-to-Failure of Plastic Piping 3.1.9 hydrostatic design basis (HDB)—a hoop stress devel-
Systems and Components
...
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: D2992 − 12 D2992 − 18 An American National Standard
Standard Practice for
Obtaining Hydrostatic or Pressure Design Basis for
“Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin)
1
Pipe and Fittings
This standard is issued under the fixed designation D2992; 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 practice establishes two procedures, Procedure A (cyclic) and Procedure B (static), for obtaining a hydrostatic design
basis (HDB) or a pressure design basis (PDB) for fiberglass piping products, by evaluating strength-regression data derived from
testing pipe or fittings, or both, of the same materials and construction, either separately or in assemblies. Both glass-fiber-
reinforced thermosetting-resin pipe (RTRP) and glass-fiber-reinforced polymer mortar pipe (RPMP) are fiberglass pipe.
NOTE 1—For the purposes of this standard, polymer does not include natural polymers.
1.2 This practice can be used for the HDB determination for fiberglass pipe where the ratio of outside diameter to wall thickness
is 10:1 or more.
NOTE 2—This limitation, based on thin-wall pipe design theory, serves further to limit the application of this practice to internal pressures which, by
the hoop-stress equation, are approximately 20 % of the derived hydrostatic design stress (HDS). For example, if HDS is 5000 psi (34 500 kPa), the pipe
is limited to about 1000-psig (6900-kPa) internal pressure, regardless of diameter.
1.3 This practice provides a PDB for complex-shaped products or systems where complex stress fields seriously inhibit the use
of hoop stress.
1.4 Specimen end closures in the underlying test methods may be either restrained or free, leading to certain limitations.
1.4.1 Restrained Ends—Specimens are stressed by internal pressure only in the hoop direction, and the HDB is applicable for
stresses developed only in the hoop direction.
1.4.2 Free Ends—Specimens are stressed by internal pressure in both hoop and longitudinal directions, such that the hoop stress
is twice as large as the longitudinal stress. This practice may not be applicable for evaluating stresses induced by loadings where
the longitudinal stress exceeds 50 % of the HDS.
1.5 The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are given for information
purposes only.
NOTE 3—There is no known ISO equivalent to this standard.
1.6 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.7 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:
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
1
This practice is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.23 on Reinforced Plastic Piping Systems
and Chemical Equipment.
Current edition approved April 1, 2012May 15, 2018. Published May 2012May 2018. Originally approved in 1971. Last previous edition approved in 20062012 as
D2992 – 06.D2992 – 12. DOI: 10.1520/D2992-12.10.1520/D2992-18.
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 ----------------------
D2992 − 18
D1598 Test Method for Time-to-Failure of Plastic Pipe Under Constant Internal Pressure
D1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings
D1600 Terminology for Abbreviate
...
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