ASTM D2444-99(2010)
(Test Method)Standard Test Method for Determination of the Impact Resistance of Thermoplastic Pipe and Fittings by Means of a Tup (Falling Weight)
Standard Test Method for Determination of the Impact Resistance of Thermoplastic Pipe and Fittings by Means of a Tup (Falling Weight)
SIGNIFICANCE AND USE
The impact resistance of thermoplastic pipe and fittings relates to suitability for service and to quality of processing. Impact resistance may also provide a relative measure of a material's resistance to breakage during handling and installation and, for non-buried applications, to in-service breakage. See Appendix X4 for guidelines for selecting testing combinations.
Results obtained by use of this test method can be used in three ways:
As the basis for establishing impact test requirements in product standards,
To measure the effect of changes in materials or processing, and
To measure the effect of the environment.
SCOPE
1.1 This test method covers the determination of the impact resistance of thermoplastic pipe and fittings under specified conditions of impact by means of a tup (falling weight). Three interchangeable striking noses are used on the tup, differing in geometrical configuration. Two specimen holders are described.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D2444 − 99 (Reapproved 2010)
Standard Test Method for
Determination of the Impact Resistance of Thermoplastic
1
Pipe and Fittings by Means of a Tup (Falling Weight)
This standard is issued under the fixed designation D2444; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3.2 Results obtained by use of this test method can be used
in three ways:
1.1 This test method covers the determination of the impact
3.2.1 As the basis for establishing impact test requirements
resistance of thermoplastic pipe and fittings under specified
in product standards,
conditions of impact by means of a tup (falling weight). Three
3.2.2 To measure the effect of changes in materials or
interchangeable striking noses are used on the tup, differing in
processing, and
geometrical configuration. Two specimen holders are de-
3.2.3 To measure the effect of the environment.
scribed.
1.2 The values stated in inch-pound units are to be regarded 4. Apparatus
as standard. The values given in parentheses are mathematical
4.1 General—One type of impact tester is illustrated in Fig.
conversions to SI units that are provided for information only
1.
and are not considered standard.
4.2 Tup:
1.3 This standard does not purport to address all of the
4.2.1 The tup nose shall be as shown in Fig. 2. When used
safety concerns, if any, associated with its use. It is the
with the 0.50-in. (12.7-mm) radius nose, it is designated asTup
responsibility of the user of this standard to establish appro-
A. When used with the 2.00-in. (51-mm) radius nose, it is
priate safety and health practices and determine the applica-
designated as Tup B. When used with the 0.25-in. (6.3-mm)
bility of regulatory limitations prior to use.
radius nose, it is designated as Tup C.
2. Referenced Documents
NOTE 1—It is suggested that tups be made of scratch-resistant steel to
2 reduce damage to the nose. Badly scarred noses may affect test results.
2.1 ASTM Standards:
4.2.2 The mass of the tup shall be 6, 12, 20, or 30 lb (2.7,
D618 Practice for Conditioning Plastics for Testing
5.4, 9.1, or 13.6 kg).
D2122 Test Method for Determining Dimensions of Ther-
moplastic Pipe and Fittings
4.3 Drop Tube:
4.3.1 The drop tube shall be of sufficient length (approxi-
3. Significance and Use
mately 12 ft (3.7 m)) to provide for a fall of at least 10 ft (3.0
3.1 The impact resistance of thermoplastic pipe and fittings
m) and shall be mounted so that the lengthwise direction is
relates to suitability for service and to quality of processing.
vertical as measured with a plumb bob or a spirit level at least
Impact resistance may also provide a relative measure of a
2 ft (610 mm) in length.
material’s resistance to breakage during handling and installa-
4.3.2 Care must be taken to ensure that the tup falls freely;
tion and, for non-buried applications, to in-service breakage.
it must not “chatter” down the tube.
See Appendix X4 for guidelines for selecting testing combi-
NOTE 2—No material for the drop tube is specified. However, a
nations.
colddrawn seamless steel tubing with an inside diameter of 2.563 6 0.003
in. (65.10 6 0.08 mm), or acrylonitrile-butadiene-styrene (ABS) or
1
poly(vinyl chloride) (PVC) plastic pipe, 2 ⁄2 in. nominal pipe size, with a
1
This test method is under the jurisdiction of ASTM Committee F17 on Plastic
standard dimension ratio (SDR) of 21, have been found to be satisfactory.
Piping Systems and is the direct responsibility of Subcommittee F17.40 on Test
NOTE 3—Provided equivalent results are obtained, the tup may be
Methods.
dropped without a drop tube or guided by other means. The drop tube is
Current edition approved Aug. 1, 2010. Published November 2010. Originally
used to reduce the hazard to operators and property that may occur when
approved in 1965. Last previous edition approved in 2005 as D2444 – 99(2005).
the tup rebounds. It also helps guide and center the tup so that it will be
DOI: 10.1520/D2444-99R10.
2
more likely to strike the top of the test specimen. It may also be necessary
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
to provide a protective barrier around the specimen, particularly for larger
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 sizesofpipeandfittings,toprotecttheoperatorfromflyingbrokenpieces.
the ASTM website. NOTE 4—The tup may not fall freely if the clearance between the tup
Copyright © ASTM Internat
...
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.
An American National Standard
Designation:D2444–99 (Reapproved 2005) Designation: D2444 – 99 (Reapproved 2010)
Standard Test Method for
Determination of the Impact Resistance of Thermoplastic
1
Pipe and Fittings by Means of a Tup (Falling Weight)
This standard is issued under the fixed designation D2444; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 This test method covers the determination of the impact resistance of thermoplastic pipe and fittings under specified
conditions of impact by means of a tup (falling weight). Three interchangeable striking noses are used on the tup, differing in
geometrical configuration. Two specimen holders are described.
1.2The values stated in inch-pound units are to be regarded as the standard. The values in parentheses are provided for
information purposes only.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D2122 Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
3. Significance and Use
3.1 The impact resistance of thermoplastic pipe and fittings relates to suitability for service and to quality of processing. Impact
resistance may also provide a relative measure of a material’s resistance to breakage during handling and installation and, for
non-buried applications, to in-service breakage. See Appendix X4 for guidelines for selecting testing combinations.
3.2 Results obtained by use of this test method can be used in three ways:
3.2.1 As the basis for establishing impact test requirements in product standards,
3.2.2 To measure the effect of changes in materials or processing, and
3.2.3 To measure the effect of the environment.
4. Apparatus
4.1 General—One type of impact tester is illustrated in Fig. 1.
4.2 Tup:
4.2.1 The tup nose shall be as shown in Fig. 2. When used with the 0.50-in. (12.7-mm) radius nose, it is designated as Tup A.
When used with the 2.00-in. (51-mm) radius nose, it is designated as Tup B. When used with the 0.25-in. (6.3-mm) radius nose,
it is designated as Tup C.
NOTE 1—It is suggested that tups be made of scratch-resistant steel to reduce damage to the nose. Badly scarred noses may affect test results.
4.2.2 The mass of the tup shall be 6, 12, 20, or 30 lb (2.7, 5.4, 9.1, or 13.6 kg).
4.3 Drop Tube:
4.3.1 The drop tube shall be of sufficient length (approximately 12 ft (3.7 m)) to provide for a fall of at least 10 ft (3.0 m) and
1
This test method is under the jurisdiction ofASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.40 on Test Methods.
Current edition approved MayAug. 1, 2005.2010. Published June 2005.November 2010. Originally approved in 1965. Last previous edition approved in 19992005 as
D2444 – 99(2005). DOI: 10.1520/D2444-99R105.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D2444 – 99 (2010)
FIG. 1 One Type of Tup Impact Tester
NOTE 1—Dimensions are in inches (millimetres).
FIG. 2 Tup Nose Detail
2
---------------------- Page: 2 ----------------------
D2444 – 99 (2010)
shall be mounted so that the lengthwise direction is vertical as measured with a plumb bob or a spirit level at least 2 ft (610 mm)
in length.
4.3.2 Care must be taken to ensure that the tup falls freely; it must not “chatter” down the tube.
NOTE 2—No material for the drop tube is specified. However, a colddrawn seamle
...
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