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ISO 7257:1983
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Aircraft -- Hydraulic tubing joints and fittings -- Rotary flexure test

This standard has been reviewed* and then confirmed in 2013.

*ISO standards are reviewed every five years.

Abstract

Specifies procedures to determine and classify the fatigue strength of reconnectable or permanent hydraulic tube joints. The procedure is intended for conducting flexure tests of these parts with high strength tubes of various alloys such as corrosion resistant steel, Nimonic, titanium and aluminium alloy tube for use on commercial and military aircraft.

 

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