ASTM B428-08
(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
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.
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.
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 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:B 428–08
Standard Test Method for
Angle of Twist in Rectangular and Square Copper and
1
Copper Alloy Tube
This standard is issued under the fixed designation B 428; 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* 4.3 This test method allows the purchaser and supplier or
manufacturer to inspect square and rectangular copper and
1.1 This test method establishes the requirements for the
copper alloy tube with a standard technique that provides
determination of the angle of twist in rectangular and square
acceptable twist in delivered tubes.
copper and copper alloy tube.
1.2 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 and Fig. 2) 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. 3.
2.1 ASTM Standards:
5.3 Parallel Face Blocks.
B 846 Terminology for Copper and Copper Alloys
6. Test Specimen
3. Terminology
6.1 The test specimen shall be cut to a length that permits
3.1 For definitions of terms related to copper and copper
the measurement of the angle of twist.
alloys, refer to Terminology B 846.
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 curva-
this test method may be used in applications in which control
ture, place the specimen so that a side having convex curvature
of twist is important to proper fit in final assembly and to
is in contact with the reference plane. Further placement
minimize rework to bring the tube into compliance. It is
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.
4.2 This test method provides a procedure for measuring the
7.1.2 For square tube, having curvature along all edges,
twist in square and rectangular copper and copper alloy tubes
place the specimen so that the side with the least convex
as a measure of the deviation from straightness.
curvature is against the reference plane.
7.2 Clamp one end of the specimen so that the tube surface,
adjacent to that end and facing the reference plane, will be in
1
This test method is under the jurisdiction ofASTM Committee B05 on Copper
firm contact with this plane. Keep the other end of the
and Copper Alloys and is the direct responsibility of Subcommit
...
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:B 428–93 (Reapproved 2004) Designation:B 428–08
Standard Test Method for
Angle of Twist in Rectangular and Square Copper and
1
Copper Alloy Tube
This standard is issued under the fixed designation B 428; 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 establishes the requirements for the determination of the angle of twist in rectangular and square copper
and copper alloy tube.
1.2 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. Significance and Use
2.1The 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.
2.2This 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.
2.3This 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. Referenced Documents
2
2.1 ASTM Standards:
B 846 Terminology for Copper and Copper Alloys
3. Terminology
3.1 For definitions of terms related to copper and copper alloys, refer to Terminology B 846.
4. 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.
5. Apparatus
3.1
5.1 Horizontal Reference Plane (see Fig. 1 and Fig. 2) of sufficient length to support the tube specimen and a clamping device
to hold one end of the specimen against the reference plane.
3.2
1
This test method is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.06 on Methods
of Test.
´1
Current edition approved May 1, 2004. Published May 2004. Originally approved in 1965. Last previous edition approved in 1998 as B428–93 (1998) .
Current edition approved Oct. 1, 2008. Published November 2008. Originally approved in 1965. Last previous edition approved in 2004 as B 428 – 93 (2004).
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.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B428–08
5.2 Transparent Plastic Protractor Segment engraved with angle lines as shown in Fig. 3.
3.3
5.3 Parallel Face Blocks.
4.
6. Test Specimen
6.1 The test specimen shall be cut to a length that permits the measurement of the angle of twist.
7. Procedure
4.1Place7.1 Place the tube specimen lengthwise on the reference plane. Whenever the specimen has noticeable edgewise
curvature, place the specimen so that a side having convex curvature is in contact with the reference plane. Further placement
requirements are as follows:
4.1.1For7.1.
...
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