ASTM E 1685 Standard Practice for Measuring the Change in Length of Fasteners Using the Ultrasonic Pulse-Echo Technique

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ASTM E 1685 Document Information:

Title
Standard Practice for Measuring the Change in Length of Fasteners Using the Ultrasonic Pulse-Echo Technique

ASTM International

Publication Date:
Oct 10, 2000

Scope:

This practice covers a procedure for measuring changes in length of threaded fasteners using conventional ultrasonic pulse-echo bolt-measuring instrumentation which has been properly calibrated.

This procedure is normally intended for metal bolting 0.25 in. (6.4 mm) or more in nominal diameter with effective length-to-diameter ratios of 2:1 or greater.

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.

Keywords:

bolts

change-in-length measurements

clamping force

fasteners

residual stress measurements

ultrasonics

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