ASTM D2992-01
(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
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 similar or equivalent ISO 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 and health practices and determine the applicability of regulatory limitations prior to use.
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An American National Standard
Designation: D 2992 – 01
Standard Practice for
Obtaining Hydrostatic or Pressure Design Basis for
“Fiberglass” (Glass-Fiber-Reinforced Thermosetting-Resin)
,
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Pipe and Fittings
This standard is issued under the fixed designation D 2992; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* hoop stress is twice as large as the longitudinal stress. This
practice may not be applicable for evaluating stresses induced
1.1 This practice establishes two procedures, Procedure A
by loadings where the longitudinal stress exceeds 50% of the
(cyclic) and Procedure B (static), for obtaining a hydrostatic
HDS.
design basis (HDB) or a pressure design basis (PDB) for
1.5 Thevaluesstatedininch-poundunitsaretoberegarded
fiberglass piping products, by evaluating strength-regression
as the standard. The values in parentheses are given for
data derived from testing pipe or fittings, or both, of the same
information purposes only.
materials and construction, either separately or in assemblies.
Both glass-fiber-reinforced thermosetting-resin pipe (RTRP)
NOTE 3—There is no similar or equivalent ISO standard.
and glass-fiber-reinforced polymer mortar pipe (RPMP) are
1.6 This standard does not purport to address all of the
fiberglass pipe.
safety concerns, if any, associated with its use. It is the
NOTE 1—For the purposes of this standard, polymer does not include responsibility of the user of this standard to establish appro-
natural polymers.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.2 ThispracticecanbeusedfortheHDBdeterminationfor
fiberglass pipe where the ratio of outside diameter to wall
2. Referenced Documents
thickness is 10:1 or more.
2.1 ASTM Standards:
NOTE 2—This limitation, based on thin-wall pipe design theory, serves
3
D618 Practice for Conditioning Plastics for Testing
further to limit the application of this practice to internal pressures which,
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D883 Terminology Relating to Plastics
by the hoop-stress equation, are approximately 20% of the derived
D1598 Test Method for Time-to-Failure of Plastic Pipe
hydrostatic design stress (HDS). For example, if HDS is 5000 psi (34500
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Under Constant Internal Pressure
kPa), the pipe is limited to about 1000-psig (6900-kPa) internal pressure,
regardless of diameter. D1599 TestMethodforShort-TimeHydraulicFailurePres-
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sure of Plastic Pipe, Tubing, and Fittings
1.3 This practice provides a PDB for complex-shaped prod-
D1600 Terminology for Abbreviated Terms Relating to
ucts or systems where complex stress fields seriously inhibit
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Plastics
the use of hoop stress.
D2143 Test Method for Cyclic Pressure Strength of Rein-
1.4 Specimen end closures in the underlying test methods
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forced Thermosetting Plastic Pipe
may be either restrained or free, leading to certain limitations.
D3567 Practice for Determining Dimensions of “Fiber-
1.4.1 Restrained Ends—Specimens are stressed by internal
glass” (Glass–Fiber–Reinforced Thermosetting Resin)
pressure only in the hoop direction, and the HDB is applicable
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Pipe and Fittings
for stresses developed only in the hoop direction.
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F412 Terminology Relating to Plastic Piping Systems
1.4.2 Free Ends—Specimens are stressed by internal pres-
F948 Test Method for Time-to-Failure of Plastic Piping
sure in both hoop and longitudinal directions, such that the
Systems and Components Under Constant Internal Pres-
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sure with Flow
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ThispracticeisunderthejurisdictionofASTMCommitteeD20onPlasticsand
2.2 ISO Standard:
is the direct responsibility of Subcommittee D20.23 on Reinforced Plastic Piping
Systems and Chemical Equipment.
Current edition approved June 10, 2001. PublishedAugust 10, 2001. Originally
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published as D2992–71. Last previous edition D2992–96. Annual Book of ASTM Standards, Vol 08.01.
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This revision incorporates a change in the data-analysis procedure. Annual Book of ASTM Standards, Vol 08.04.
*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.
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D 2992 – 01
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3 Preferred Numbers—Series of Preferred Numbers pipingcomponentwithahighdegreeofcertaintythatfailureof
the component will not occur.
3. Terminology
3.1.11 hydrostatic design stress (HDS)—the estimated
3.1 Definitions:
maximum tensile stress in the wall of the pipe in the hoop
3.1.1 General—Definitions are in accor
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