International Standard
ISO 7257:2016
Aircraft — Hydraulic tubing joints and fittings — Rotary flexure test
Reference number
ISO 7257:2016
Edition 2
2016-06
© ISO 2024
International Standard
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Published (Edition 2, 2016)
This standard was last reviewed and confirmed in 2021. Therefore this version remains current.

ISO 7257:2016

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CHF 63
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Abstract

ISO 7257:2016 specifies a flexure test procedure to determine and classify the fatigue strengths of reconnectable or permanent hydraulic tube joints.

The procedure is intended for conducting flexure tests of fittings and joints with high-strength hydraulic tubes of various alloys such as corrosion resistant steel, Nimonic?[1], titanium and aluminium alloy hydraulic tube for use on commercial and military aircraft.

A mean stress is applied by holding system pressure in the specimens and then flexing in a rotary bending test machine.

[1] Nimonic? is the trademark of a product supplied by Special Metals Corporation. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the product named. Equivalent products can be used if they can be shown to lead to the same results.

General information

  • Status
     : Published
    Publication date
     : 2016-06
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 2
    Number of pages
     : 12
  • Technical Committee :
    ISO/TC 20/SC 10
    ICS :
    49.080 
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Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

9
Industry, Innovation and Infrastructure

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