ASTM B428-09

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.