ASTM F2231-02

Standard Test Method for Charpy Impact Test on Thin Specimens of Polyethylene Used in Pressurized Pipes

SCOPE
1.1 This test method describes the specimen preparation and the method of measuring the impact energy of polyethylene used in pressurized pipes.
1.2 The test specimens are taken from compression molded plaques of the resin from pellets or pipe.
1.3 UnitsThe values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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-Dec-2002
• Technical Committee: F17 - Plastic Piping Systems
• Drafting Committee: F17.40 - Test Methods

Relations

• Replaced By: ASTM F2231-02e1 - Standard Test Method for Charpy Impact Test on Thin Specimens of Polyethylene Used in Pressurized Pipes
• Effective Date: 10-Dec-2002

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 2231 – 02
Standard Test Method for
Charpy Impact Test on Thin Specimens of Polyethylene
Used in Pressurized Pipes
This standard is issued under the fixed designation F 2231; 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.
1. Scope 3. Terminology
1.1 This test method describes the specimen preparation and 3.1 critical temperature, (CT), for RCP in a pressurized
the method of measuring the impact energy of polyethylene pipe, the temperature above which RCP is not possible at any
used in pressurized pipes. pressure.
1.2 The test specimens are taken from compression molded
4. Summary of Test Method
plaques of the resin from pellets or pipe.
1.3 Units—The values stated in SI units are to be regarded 4.1 The Charpy specimen is 3 mm thick and taken from a
compression-molded plaque of the resin. The specimen is
as standard. No other units of measurement are included in this
standard. notched precisely with a razor blade and tested at 23°C.
1.4 This standard does not purport to address all of the
5. Significance and Use
safety concerns, if any, associated with its use. It is the
5.1 The Charpy impact energy is related to the critical
responsibility of the user of this standard to establish appro-
temperature of the rapid crack propagation [RCP] behavior as
priate safety and health practices and determine the applica-
measured by the ISO 13477, S-4 test.
bility of regulatory limitations prior to use.
5.2 The test method may be used to determine the impact
2. Referenced Documents
energy of polyethylene used in the manufacture of pipe . This
test method involves the preparation of a small compression
2.1 ASTM Standards:
D 6110 Test Method for Determining the Charpy Impact molded specimen of PE resin that is then notched in a specified
manner. The specimen is then broken in a pendulum impact
Resistance
F 412 Terminology Relating to Plastic Piping Systems machine. The impact energy is recorded in joules. The value
obtained is referred to as the Charpy impact energy.
F 1473 Test Method for Notch Tensile Test to Measure the
Resistance to Slow Crack Growth of PE Pipes and Resins
6. Apparatus
2.2 ISO Standard:
6.1 Impact Tester, with input energy of 1 to 3 J and impact
ISO 13477 Small Scale Steady State S-4 Test
velocity of about 3.0 μs. The energy loss shall be measured
2.3 Other References:
with a precision of 6 0.004 J.
Brown, N. and Lu, X., “Dependence of Rapid Crack
6.2 Notching Machine, capable of notching with a razor
Propagation in PE Pipes on the Plane Stress Fracture
blade with a precision of 6 0.01 mm and which presses the
Energy of the Resin,” Polymer Engineering and Science,
razor blade into the specimen.
Vol 41, 2001, p. 1140.
6.3 Details concerning pendulum impact machines are in
Brown, N. and Lu, X., “A Simple Test to Prevent Rapid
Test Method D 6110 section on Apparatus.
Crack Propagation,” Plastic Pipes XI, Munich, 2001, p.
583.
7. Test Specimen
7.1 The specimen is cut from the compression molded
plaque of the resin from pellets or from the compression
This test method is under the jurisdiction of ASTM Committee F17 on Plastic
molded plaque of sections taken from a pipe.
Piping Systems and is the direct responsibility of Subcommittee F17.40 on Test
7.2 The specimen geometry is shown in Fig. 1.
Methods.
7.3 The dimension tolerances are as follows: thickness = 3
Current edition approved Dec. 10, 2002. Published July 2003.
Annual Book of ASTM Standards, Vol 08.03. 6 0.2 mm; width = 10 6 0.2 mm; length = 80 6 1 mm; notch
Annual Book of ASTM Standards, Vol 08.04.
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036. The critical temperature is also related to the dimensions of the pipe.
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