ASTM D2992-06
(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 – 06
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 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* 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 similar or equivalent ISO 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-
NOTE 1—For the purposes of this standard, polymer does not include priate safety and health practices and determine the applica-
natural polymers.
bility of regulatory limitations prior to use.
1.2 ThispracticecanbeusedfortheHDBdeterminationfor
2. Referenced Documents
fiberglass pipe where the ratio of outside diameter to wall
2
2.1 ASTM Standards:
thickness is 10:1 or more.
D618 Practice for Conditioning Plastics for Testing
NOTE 2—This limitation, based on thin-wall pipe design theory, serves
D883 Terminology Relating to Plastics
further to limit the application of this practice to internal pressures which,
D1598 Test Method for Time-to-Failure of Plastic Pipe
by the hoop-stress equation, are approximately 20% of the derived
Under Constant Internal Pressure
hydrostatic design stress (HDS). For example, if HDS is 5000 psi (34500
D1599 Test Method for Resistance to Short-Time Hydrau-
kPa), the pipe is limited to about 1000-psig (6900-kPa) internal pressure,
regardless of diameter. lic Pressure of Plastic Pipe, Tubing, and Fittings
D1600 Terminology for Abbreviated Terms Relating to
1.3 This practice provides a PDB for complex-shaped prod-
Plastics
ucts or systems where complex stress fields seriously inhibit
D2143 Test Method for Cyclic Pressure Strength of Rein-
the use of hoop stress.
forced, Thermosetting Plastic Pipe
1.4 Specimen end closures in the underlying test methods
D3567 Practice for Determining Dimensions of “Fiber-
may be either restrained or free, leading to certain limitations.
glass” (Glass-Fiber-ReinforcedThermosetting Resin) Pipe
1.4.1 Restrained Ends—Specimens are stressed by internal
and Fittings
pressure only in the hoop direction, and the HDB is applicable
F412 Terminology Relating to Plastic Piping Systems
for stresses developed only in the hoop direction.
F948 Test Method for Time-to-Failure of Plastic Piping
1.4.2 Free Ends—Specimens are stressed by internal pres-
Systems and Components Under Constant Internal Pres-
sure in both hoop and longitudinal directions, such that the
sure With Flow
hoop stress is twice as large as the longitudinal stress. This
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ThispracticeisunderthejurisdictionofASTMCommitteeD20onPlasticsand
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is the direct responsibility of Subcommittee D20.23 on Reinforced Plastic Piping For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Systems and Chemical Equipment. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Oct. 15, 2006. Published November 2006. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1971. Last previous edition approved in 2001 as D2992–01. 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.
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D 2992 – 06
2.2 ISO Standard: cyclically (Procedure A) or continuously (Procedure B) to a
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3 Preferred Numbers—Series of Preferred Numbers pipingcomponentwithahighdegreeofcertaintythatfailureof
the component will not occur.
3. Terminology
3.1.11 hydr
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