ASTM B968/B968M-09

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
Designation: B968/B968M – 09
Standard Test Method for
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
1.1 This test method establishes the requirements for the 5.1 When properly performed and interpreted, the flattening
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
1.2 Units—Values stated in either inch-pound units or SI seam.
units are to be regarded as standard. Within the text, SI units 5.2 Incertainproductspecificationswhichestablishrequire-
are shown in brackets. The values stated in each system may ments for tubes of sizes greater than 4 in. [100 mm], the test
not be exact equivalents; therefore, each system shall be used may be allowed as a substitute to the expansion pin test in
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
responsibility of the user of this standard to establish appro- either hydraulically or mechanically operated, that will exert
pressure sufficient to flatten the pipe or tube to the required
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. degree.
6.2 Micrometer Caliper—Any measuring device that has
2. Referenced Documents
the capability to measure a flattened sample approximately
2.1 ASTM Standards: three (3) times the product wall thickness.
B153 Test Method for Expansion (Pin Test) of Copper and
7. Sampling and Test Specimen Preparation
Copper-Alloy Pipe and Tubing
B846 Terminology for Copper and Copper Alloys 7.1 Forseamlessproductuptoandincluding4in.[100mm]
outside diameter:
3. Terminology
7.1.1 Atest specimen shall be cut to a length that will allow
3.1 For definitions of terms related to copper and copper thetubetobeflattenedatthree(3)placesalongthelength,with
alloys, refer to Terminology B846. 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
4. Summary of Test Method
prior to testing.
4.1 The prepared test sample is flattened in a press to a 7.2 For welded product up to and including 4 in. [100 mm]
specified maximum thickness, and then inspected for defects of
in outside diameter:
a size and nature that would interfere with the intended 7.2.1 Atest specimen shall be cut to a length that will allow
application of the product specification.
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.
This test method is under the jurisdiction ofASTM Committee B05 on Copper
7.3 For seamless product over 4 in. [100 mm] in outside
and Copper Alloys and is the direct responsibility of Subcommittee B05.06 on
diameter:
Methods of Test.
Current edition approved Oct. 15, 2009. Published November 2009.
7.3.1 Atest specimen shall be cut to a length that will allow
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the tube to be flattened once, with the flattened area to be at
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
least 4 in. [100 mm] in length. When the temper is other than
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. annealed, the sample is allowed to be annealed prior to testing.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B968/B968M – 09
7.3.2 Both ends of the test specimen may be prepared by over the flattened area. The flattened areas of the test specimen
filing or cutting to provide smooth end surfaces, free from shall be inspected for sur
...