ASTM B428-09(2013)
(Test Method)Standard Test Method for Angle of Twist in Rectangular and Square Copper and Copper Alloy Tube
Standard Test Method for Angle of Twist in Rectangular and Square Copper and Copper Alloy Tube
SIGNIFICANCE AND USE
4.1 The rectangular or square copper alloy tube covered by this test method may be used in applications in which control of twist is important to proper fit in final assembly and to minimize rework to bring the tube into compliance. It is recognized that the amount of twist, in degrees, per increment of length can change as a result of the weight of the product and its length during measurement.
4.2 This test method provides a procedure for measuring the twist in square and rectangular copper and copper alloy tubes as a measure of the deviation from straightness.
4.3 This test method allows the purchaser and supplier or manufacturer to inspect square and rectangular copper and copper alloy tube with a standard technique that provides acceptable twist in delivered tubes.
SCOPE
1.1 This test method establishes the requirements for the determination of the angle of twist in rectangular and square copper and copper alloy tube.
1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this 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.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: B428 − 09 (Reapproved 2013)
Standard Test Method for
Angle of Twist in Rectangular and Square Copper and
Copper Alloy Tube
This standard is issued under the fixed designation B428; 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 4.2 This test method provides a procedure for measuring the
twist in square and rectangular copper and copper alloy tubes
1.1 This test method establishes the requirements for the
as a measure of the deviation from straightness.
determination of the angle of twist in rectangular and square
copper and copper alloy tube. 4.3 This test method allows the purchaser and supplier or
manufacturer to inspect square and rectangular copper and
1.2 The values stated in inch-pound units are to be regarded
copper alloy tube with a standard technique that provides
as standard. No other units of measurement are included in this
acceptable twist in delivered tubes.
standard.
1.3 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
5.1 Horizontal Reference Plane (see Fig. 1 (a) and (b)) of
responsibility of the user of this standard to establish appro-
sufficient length to support the tube specimen and a clamping
priate safety and health practices and determine the applica-
device to hold one end of the specimen against the reference
bility of regulatory limitations prior to use.
plane.
2. Referenced Documents 5.2 Transparent Plastic Protractor Segment engraved with
2 angle lines as shown in Fig. 1 (c).
2.1 ASTM Standards:
5.3 Parallel Face Blocks.
B846 Terminology for Copper and Copper Alloys
6. Test Specimen
3. Terminology
6.1 The test specimen shall be cut to a minimum length of
3.1 For definitions of terms related to copper and copper
10 in. and a maximum length of 15 in.
alloys, refer to Terminology B846.
7. Procedure
4. Significance and Use
7.1 Place the tube specimen lengthwise on the reference
4.1 The rectangular or square copper alloy tube covered by
plane. Whenever the specimen has noticeable edgewise
this test method may be used in applications in which control
curvature, place the specimen so that a side having convex
of twist is important to proper fit in final assembly and to
curvature is in contact with the reference plane. Further
minimize rework to bring the tube into compliance. It is
placement requirements are as follows:
recognized that the amount of twist, in degrees, per increment
7.1.1 For rectangular tube, place a major outer dimension
of length can change as a result of the weight of the product
side (width side) against the reference plane, as shown in Fig.
and its length during measurement.
1 (a).
7.1.2 For square tube, having curvature along all edges,
place the specimen so that the side with the least convex
This test method is under the jurisdiction ofASTM Committee B05 on Copper
curvature is against the reference plane.
and Copper Alloys and is the direct responsibility of Subcommittee B05.06 on
Methods of Test.
7.2 Clamp one end of the specimen
...
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