ASTM D2925-95(2000)e1

Standard Test Method for Beam Deflection of "Fiberglass" (Glass-Fiber-Reinforced Thermosetting Resin) Pipe Under Full Bore Flow

SCOPE
1.1 This test method covers measurement of the deflection as a function of time of a specimen of fiberglass pipe supported on a flat non-arced support as a simple beam under full bore flow of water at elevated temperatures. Both glass-fiber-reinforced thermosetting-resin pipe (RTRP) and glass-fiber-reinforced polymer mortar pipe (RPMP) are fiberglass pipes.
Note 1—For the purposes of this standard, polymer does not include natural polymers.
1.2 This test method can be used to determine deflection at varying conditions by substituting other test media.
1.3 Deflections observed using this test method are representative only of piping supported as a simple beam under full bore flow which has one diameter of pipe overhanging at each support.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.
Note 1—There is no or equivalent ISO standard.
1.5  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.

General Information

• Status: Historical
• Publication Date: 09-Jun-2001
• ICS: 23.040.20 - Plastics pipes
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.23 - Reinforced Thermosetting Resin Piping Systems and Chemical Equipment

Relations

• Replaced By: ASTM D2925-01 - Standard Test Method for Beam Deflection of "Fiberglass" (Glass-Fiber-Reinforced Thermosetting Resin) Pipe Under Full Bore Flow
• Effective Date: 10-Jun-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
e1
Designation: D 2925 – 95 (Reapproved 2000) An American National Standard
Standard Test Method for
Beam Deflection of “Fiberglass” (Glass-Fiber-Reinforced
Thermosetting Resin) Pipe Under Full Bore Flow
This standard is issued under the fixed designation D 2925; 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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Section 1.4 was editorially revised, and keywords were added in November 2000.
1. Scope 3. Terminology
1.1 This test method covers measurement of the deflection 3.1 General—Definitions are in accordance with Terminolo-
as a function of time of a specimen of fiberglass pipe supported gies D 883 and F 412 and abbreviations are in accordance with
on a flat non-arced support as a simple beam under full bore Terminology D 1600, unless otherwise indicated.
flow of water at elevated temperatures. Both glass-fiber- 3.2 Definitions of Terms Specific to This Standard:
reinforced thermosetting-resin pipe (RTRP) and glass-fiber- 3.2.1 aggregate— a siliceous sand conforming to the re-
reinforced plastic mortar pipe (RPMP) are fiberglass pipes. quirements of Specification C 33, except that the requirements
1.2 This test method can be used to determine deflection at for gradation shall not apply.
varying conditions by substituting other test media. 3.2.2 fiberglass pipe—a tubular product containing glass
1.3 Deflections observed using this test method are repre- fiber reinforcement embedded in or surrounded by cured
sentative only of piping supported as a simple beam under full thermosetting resin; the composite structure may contain
bore flow which has one diameter of pipe overhanging at each aggregate, granular or platelet fillers, thixotropic agents, pig-
support. ments, or dyes; thermoplastic or thermosetting liners may be
1.4 The values stated in SI units are to be regarded as the included.
standard. The values given in parentheses are provided for 3.2.3 reinforced thermosetting resin pipe (RTRP)—a fiber-
information purposes only. glass pipe without aggregate.
3.2.4 reinforced plastic mortar pipe (RPMP)—a fiberglass
NOTE 1—There is no or equivalent ISO standard.
pipe with aggregate.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 4. Significance and Use
responsibility of the user of this standard to establish appro-
4.1 In the absence of deflection measurements from actual
priate safety and health practices and determine the applica-
installed-above-ground piping, this test method may be used to
bility of regulatory limitations prior to use.
evaluate the influence of span length on mid-span deflections at
differing temperatures under full bore flow.
2. Referenced Documents
NOTE 2—A flat bearing area, small contact area, and narrow bearing
2.1 ASTM Standards:
width may induce high localized support interaction stresses, and con-
C 33 Specification for Concrete Aggregates
straints imposed by the supports may also adversely influence deflections
D 883 Terminology Relating to Plastics
and performance of the pipe.
D 1600 Terminology for Abbreviated Terms Relating to
Plastics 5. Apparatus
D 3567 Practice for Determining Dimensions of “Fiber- 1
5.1 Rigid Support with edges rounded to a 6-mm ( ⁄4-in.)
glass” (Glass-Fiber-Reinforced Thermosetting-Resin) Pipe
radius, consisting of two uprights of a convenient height. The
and Fittings
uprights are to be spaced at a predetermined distance over
F 412 Terminology Relating to Plastic Piping Systems
which deflection is to be determined as shown on Fig. 1. The
uprights shall have lateral guides, a saddle, groove, or inden-
tation on the top to keep the pipe specimen from rolling off
This test method is under the jurisdiction of ASTM Committee D-20 on Plastics
when placed in position.
and is the direct responsibility of Subcommittee D20.23 on Reinforced Plastic
5.1.1 The support space distance shall be estimated for a
Piping Systems.
Current edition approved Oct. 10, 1995. Published December 1995. Originally
maximum allowable sag of 12.7 mm ( ⁄2 in.) at test conditions.
published as D 2925 – 70. Last previous edition D 2925 – 90.
This estimate may be made by solving Eq 1 for L, using y=
Annual Book of ASTM Standards, Vol 04.02.
3 12.7 mm ( ⁄2 in.) and assuming an elastic modulus, E=
Annual Book of ASTM Standards, Vol 08.01.
Annual Book of ASTM Standards, Vol 08.04. 1 000 000 psi, unless a more accurate value is available.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
D 2925
FIG. 1 Schematic of Test Specimen Support
5.2 Source of Hot Water and a Feed System maintained at 5.3 Flexible Connections for the ends of the pipe test
conditions such that when this source is coupled to the pipe specimens, installed so as to produce negligible load on the
specimen and the water is fed into the specimen, the water ends of the pipe.
emerging from the specimen shall be maintained continuously 5.4 A Device for Measuring the Deflection of the pipe
at the controlled temperature within 62°C (3.6°F). The water specimen to the nearest 0.025 mm (0.001 in.) with negligible
shall be fed into the specimen at a head not exceeding 1.5 m (5 constraint on the specimen. A recommended device is a
ft) and allowed to flow through it under such conditions that the cathetometer as shown on Fig. 1.
pipe spec
...