Standard Practice for Measuring the Change in Length of Bolts Using the Ultrasonic Pulse-Echo TechniqueTranslate name
STANDARD published on 1.10.2020
Designation standards: ASTM E1685-20
Publication date standards: 1.10.2020
The number of pages: 5
Approximate weight : 15 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
bolts, change-in-length measurements, stress measurements, ultrasonics. ,, ICS Number Code 17.040.30 (Measuring instruments),21.060.01 (Fasteners in general)
|Significance and Use|
5.1ï¿½The techniques described provide for the measurement of change in length of a fastener. Such measurements are made from one end of the specimen without requiring access to the rear surface.
5.2ï¿½The Ultrasonic Pulse Echo technique is used to monitor changes in length of fasteners and as a tool for industrial quality control. Applications include fasteners used in turbines, petrochemical pressure vessels, aircraft, automotive manufacturing, general bolting within the nuclear industry, structural steel connections, and laboratory testing.
1.1ï¿½This practice covers a procedure for measuring changes in length of threaded bolts using the ultrasonic pulse-echo technique.
1.2ï¿½This procedure is normally intended for metal bolting 6.3 mm or more in nominal diameter with effective length-to-diameter ratios of 2:1 or greater.
1.3ï¿½The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4ï¿½This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5ï¿½This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
|2. Referenced Documents|
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