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Description of ASTM-E1736 2010ASTM E1736 - 10Standard Practice for Acousto-Ultrasonic Assessment of Filament-Wound Pressure VesselsActive Standard ASTM E1736 | Developed by Subcommittee: E07.04 Book of Standards Volume: 03.03 ASTM E1736Significance and Use The AU method should be considered for vessels that are proven to be free of major flaws or discontinuities as determined by conventional techniques. The AU method may be used for detecting major flaws if other methods are deemed impractical. It is important to use methods such as immersion pulse-echo ultrasonics (Practice E1001 ) and acoustic emission (Practice E1067 ) to ascertain the presence of major flaws before proceeding with AU. The AU method is intended almost exclusively for materials characterization by assessing the collective effects of dispersed defects and subcritical flaw populations. These are material aberrations that influence AU measurements and also underlie mechanical property variations, dynamic load response, and impact and fracture resistance. The AU method can be used to evaluate laminate quality using access to only one surface, the usual constraint imposed by closed pressure vessels. For best results, the AU probes must be fixtured to maintain the probe orientation at normal incidence to the curved surface of the vessel. Given these constraints, this practice describes a procedure for automated AU scanning using water squirters to assess the serviceability and reliability of filament-wound pressure vessels. 1. Scope 1.1 This practice covers a procedure for acousto-ultrasonic (AU) assessment of filament-wound pressure vessels. Guidelines are given for the detection of defect states and flaw populations that arise during materials processing or manufacturing or upon exposure to aggressive service environments. Although this practice describes an automated scanning mode, similar results can be obtained with a manual scanning mode. 1.2 This procedure recommends technical details and rules for the reliable and reproducible AU detection of defect states and flaw populations. The AU procedure described herein can be a basis for assessing the serviceability of filament-wound pressure vessels. 1.3 The objective of the AU method is primarily the assessment of defect states and diffuse flaw populations that influence the mechanical strength and ultimate reliability of filament-wound pressure vessels. The AU approach and probe configuration are designed specifically to determine composite properties in lateral rather than through-the-thickness directions. 1.4 The AU method is not for flaw detection in the conventional sense. The AU method is most useful for materials characterization, as explained in Guide E1495 , which gives the rationale and basic technology for the AU method. Flaws and discontinuities such as large voids, disbonds, or extended lack of contact of interfaces can be found by other nondestructive examination (NDE) methods such as immersion pulse-echo ultrasonics. 1.5 Units The values stated in SI units are to be regarded as standard. No other units of measurement are included in this practice. 1.6 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.
ASTM Standards E543 Specification for Agencies Performing Nondestructive Testing E1001 Practice for Detection and Evaluation of Discontinuities by the Immersed Pulse-Echo Ultrasonic Method Using Longitudinal Waves E1067 Practice for Acoustic Emission Examination of Fiberglass Reinforced Plastic Resin (FRP) Tanks/Vessels E1316 Terminology for Nondestructive Examinations E1495 Guide for Acousto-Ultrasonic Assessment of Composites, Laminates, and Bonded Joints ASNT Standards ASNTSNT-TC-1A Personnel Qualification and Certification in Nondestructive TestingAIA Standard NAS-410 Certification and Qualification of Nondestructive Test PersonnelKeywords acoustic emission; acousto-ultrasonics; fiber reinforced composites; filament-wound pressure vessels; nondestructive evaluation; nondestructive testing; Pressure vessels; Acoustic emission (AE) testing; Acousto-ultrasonic (AU) method; Composites; Fiber-reinforced composites; Filament-wound pressure vessels; Nondestructive evaluation (NDE); Pressure vessel plastic; Ultrasonic testing ; ICS Code ICS Number Code 19.100 (Non-destructive testing) DOI: 10.1520/E1736-10 ASTM International is a member of CrossRef. ASTM E1736The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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