ASTM B968/B968M-10
(Test Method)Standard Test Method for Flattening of Copper and Copper-Alloy Pipe and Tube
Standard Test Method for Flattening of Copper and Copper-Alloy Pipe and Tube
SIGNIFICANCE AND USE
When properly performed and interpreted, the flattening test will provide information about the relative ductility of a tube and presence of surface defects. For welded tube products, the test will provide information on the integrity of the weld seam.
In certain product specifications which establish requirements for tubes of sizes greater than 4 in. [100 mm], the test may be allowed as a substitute to the expansion pin test in B153.
SCOPE
1.1 This test method establishes the requirements for the flattening test for copper and copper alloy pipe and tube of all sizes. The method addresses both inch-pound and metric considerations, and both seamless and welded product.
1.2 Units—Values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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: B968/B968M − 10
StandardTest Method for
1
Flattening of Copper and Copper-Alloy Pipe and Tube
This standard is issued under the fixed designation B968/B968M; 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.
1. Scope 5. Significance and Use
5.1 When properly performed and interpreted, the flattening
1.1 This test method establishes the requirements for the
flattening test for copper and copper alloy pipe and tube of all test will provide information about the relative ductility of a
sizes. The method addresses both inch-pound and metric tubeandpresenceofsurfacedefects.Forweldedtubeproducts,
considerations, and both seamless and welded product. the test will provide information on the integrity of the weld
seam.
1.2 Units—Values stated in either inch-pound units or SI
5.2 Incertainproductspecificationswhichestablishrequire-
units are to be regarded as standard. Within the text, SI units
are shown in brackets. The values stated in each system may ments for tubes of sizes greater than 4 in. [100 mm], the test
may be allowed as a substitute to the expansion pin test in
not be exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two B153.
systems may result in non-conformance with the standard.
6. Apparatus
1.3 This standard does not purport to address all of the
6.1 Testing Machine (Press)—Any type of testing machine;
safety concerns, if any, associated with its use. It is the
either hydraulically or mechanically operated, that will exert
responsibility of the user of this standard to establish appro-
pressure sufficient to flatten the pipe or tube to the required
priate safety and health practices and determine the applica-
degree.
bility of regulatory limitations prior to use.
6.2 MicrometerCaliper—Anymeasuringdevicethathasthe
capability to measure a flattened sample approximately three
2. Referenced Documents
(3) times the product wall thickness.
2
2.1 ASTM Standards:
B153 Test Method for Expansion (Pin Test) of Copper and
7. Sampling and Test Specimen Preparation
Copper-Alloy Pipe and Tubing
7.1 Forseamlessproductuptoandincluding4in.[100mm]
B846 Terminology for Copper and Copper Alloys
outside diameter:
7.1.1 Atest specimen shall be cut to a length that will allow
3. Terminology
thetubetobeflattenedatthree(3)placesalongthelength,with
3.1 For definitions of terms related to copper and copper
each flattened area to be at least 2 in. [50 mm] in length. When
alloys, refer to Terminology B846. the temper is other than annealed, the sample may be annealed
prior to testing.
4. Summary of Test Method
7.2 For welded product up to and including 4 in. [100 mm]
4.1 The prepared test sample is flattened in a press to a in outside diameter:
specified maximum thickness, and then inspected for defects of 7.2.1 Atest specimen shall be cut to a length that will allow
a size and nature that would interfere with the intended the tube to be flattened along the length, so a total of at least 12
application of the product specification. in. [305 mm] is flattened. When the temper is other than
annealed, the sample is allowed to be annealed prior to testing.
7.3 For seamless product over 4 in. [100 mm] in outside
1
This test method is under the jurisdiction ofASTM Committee B05 on Copper
diameter:
and Copper Alloys and is the direct responsibility of Subcommittee B05.06 on
7.3.1 Atest specimen shall be cut to a length that will allow
Methods of Test.
the tube to be flattened once, with the flattened area to be at
Current edition approved April 1, 2010. Published May 2010. Originally
least 4 in. [100 mm] in length. When the temper is other than
approved in 2009. Last previous edition approved in 2009 as B968/B968M – 09.
DOI: 10.1520/B0968_B0968M-10.
annealed, the sample is allowed to be annealed prior to testing.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.3.2 Both ends of the test specimen may be prepared by
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
filing or cutting to provide smooth end surfaces, free from
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. scratches or burrs which might interfere with the test.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B968/B968M − 10
8. Procedure over the flattened area. The flattened areas of the test specimen
shall be inspected for surface defects.
8.1 Forseamlessproductuptoandincluding4in.[100mm
...
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.
Designation:B968/B968M–09 Designation: B968/B968M – 10
Standard Test Method for
1
Flattening of Copper and Copper-Alloy Pipe and Tube
This standard is issued under the fixed designation B968/B968M; 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.
1. Scope
1.1 This test method establishes the requirements for the flattening test for copper and copper alloy pipe and tube of all sizes.
The method addresses both inch-pound and metric considerations, and both seamless and welded product.
1.2 Units—Valuesstatedineitherinch-poundunitsorSIunitsaretoberegardedasstandard.Withinthetext,SIunitsareshown
in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of
the other. Combining values from the two systems may result in non-conformance with the 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:
B153 Test Method for Expansion (Pin Test) of Copper and Copper-Alloy Pipe and Tubing
B846 Terminology for Copper and Copper Alloys
3. Terminology
3.1 For definitions of terms related to copper and copper alloys, refer to Terminology B846.
4. Summary of Test Method
4.1 The prepared test sample is flattened in a press to a specified maximum thickness, and then inspected for defects of a size
and nature that would interfere with the intended application of the product specification.
5. Significance and Use
5.1 When properly performed and interpreted, the flattening test will provide information about the relative ductility of a tube
and presence of surface defects. For welded tube products, the test will provide information on the integrity of the weld seam.
5.2 In certain product specifications which establish requirements for tubes of sizes greater than 4 in. [100 mm], the test may
be allowed as a substitute to the expansion pin test in B153.
6. Apparatus
6.1 Testing Machine (Press)—Any type of testing machine; either hydraulically or mechanically operated, that will exert
pressure sufficient to flatten the pipe or tube to the required degree.
6.2 Micrometer Caliper—Any measuring device that has the capability to measure a flattened sample approximately three (3)
times the product wall thickness.
7. Sampling and Test Specimen Preparation
7.1 For seamless product up to and including 4 in. [100 mm] outside diameter:
7.1.1 A test specimen shall be cut to a length that will allow the tube to be flattened at three (3) places along the length, with
each flattened area to be at least 2 in. [50 mm] in length. When the temper is other than annealed, the sample may be annealed
prior to testing.
1
This test method is under the jurisdiction ofASTM Committee B05 on Copper and CopperAlloys and is the direct responsibility of Subcommittee B05.06 on Methods
of Test.
Current edition approved Oct. 15, 2009. Published November 2009.
Current edition approved April 1, 2010. Published May 2010. Originally approved in 2009. Last previous edition approved in 2009 as B968/B968M – 09. DOI:
10.1520/B0968_B0968M-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
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 ----------------------
B968/B968M – 10
7.2 For welded product up to and including 4 in. [100 mm] in outside diameter:
7.2.1 A test specimen shall be cut to a length that will allow the tube to be flattened along the length, so a total of at least 12
in. [305 mm] is flattened. When the temper is other than annealed, the sample is allowed to be annealed prior to testing.
7.3 For seamless product over 4 in. [100 mm] in outside diameter:
7.3.1 A test specimen shall be cut to a length that will allow the tube to be flattened once, with the flattened area to be at least
4 in. [100 mm] in length. When the temper is other than annealed, the s
...
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