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Coupling Assembly, Threadless, Flexible, Fixed Cavity, Self-Bonding, Procurement Specification
- Aerospace Standard
Published December 07, 2017 by SAE International in United States
Downloadable datasets availableAnnotation ability available
This SAE Aerospace Standard (AS) defines the requirements for a threadless, flexible, self-bonding coupling assembly which, when installed on machined fixed cavity ferrules, provides a flexible connection for joining tubing and components in aircraft fuel, vent or other systems. This assembled coupling, hereafter referred to as the assembly, and is designed for use from −65 to +400 °F and at 125 psig nominal operating pressure.
AS1650 was not designed for the new certification requirements for flammable leakage zones and fuel tanks for lightning protection and assembly redundancy. As such their use and installation may require additional efforts and equipment to support new FAA CFR compliance. The AS7510 flexible coupling should be the preferred coupling for use in flammable leakage zones and fuel tanks that require service life and functionality for lightning protection and part redundancy.
Added qualification by similarity guidelines, updated Figure 1 graphics, and corrected referenced sections in 126.96.36.199.2. Added reference to AS7510 for FAR compliant coupling usage. Revised Figure 1 to improve graphics.
Data Sets - Support Documents
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|Table 2||Physical requirements|
|Table 3||Tube size and wall thickness|
|Table 4||Pressure surge cycles by dash size|
|Table 5||Test schedule and specimen|
|Table 6||Qualification matrix|
|Table 7||Impact classification and required IRR|
|Table 8A||98% IRR sample sizes|
|Table 8B||95% IRR sample sizes|
|Table 8C||92% IRR sample sizes|
|Table 9||Classification of aspects|
|Table 11||Sinusoidal resonance dwell vibration levels, sizes -48 & -64|
|Table 12||Sinusoidal resonance dwell test times|
|Table 13||Vibration levels|
|Table 14||Acceleration levels|
G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
This Committee is responsible for developing and maintaining standards for design, test, and procurement of fluid systems part standards to improve reliability and economy. Their primary focus is on AS standards development and support of military standards. The Committee also develops ISO standards in a Subcommittee Advisory Group (SCAG) to ISO/TC 20/SC 10, and SAE-MA derivatives thereof.Structure: SAE G-3 -- Parent committee SAE G-3A -- Aerospace Couplings Subcommittee SAE G-3B -- Aerospace Fittings Subcommittee SAE G-3D -- Aerospace Hose Subcommittee SAE G-3E - Aerospace Tubing Assemblies Subcommittee U.S. SCAG to ISO/TC 20/SC 10 -- ISO standards Major projects: Support of Military Standards Reform Support of military standard conversions to MIL-PERF and MIL-DTL. Development of AS replacements for military standards designated for conversion. Establish document to list G-3 accepted replacements for replaced part standards and military back-up specifications. Development of PRI QML/QPL Development of Performance Review Institute (PRI) process for approval and surveillance of manufacturers (Qualified Manufacturer List, QML) and for approval of standard parts as qualified for use (Qualified Parts List, QPL). Development of ISO Standards, Imperial Units ISO/TC 20/SC 10 standards have typically been developed in SI units. The ISO has approved development of inch-based ISO standards to support commercial aviation. Basic design, test, and procurement specifications will be selected from military standards that are to be converted to Non-Government standard (NGS) and developed as ISO standards.
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