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Coupling Assembly, Threadless, Flexible, Fixed Cavity, Current Carrying, Self-Bonding, Procurement Specification
- Aerospace Standard
- AS5830
- Reaffirmed
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This aerospace specification defines the requirements for a threadless, flexible, conductive, self-bonding coupling assembly which, when installed on fixed cavity ferrules, provides a flexible, current carrying connection for joining tubing and components in aircraft fuel, vent and other systems. The assembled coupling is designed to provide interchangeability of parts and components between qualified manufacturers for the service life of the aircraft system. The assembled coupling is for use from -65 to +200 °F at nominal operating pressures (125 psig for -08 through -64 and 30 psig for -72 through -88).
This aerospace specification is a departure from prior qualification practices for assembled couplings. Prior practice sought to validate this type of assembled coupling design by conducting a sequence of tests on sets of coupling assemblies. There were multiple test sequences and each was conducted on a different set of coupling assemblies. Each of these test sequences challenged a particular design feature of the coupling assembly. No single coupling assembly was expected to survive all of the required tests.
FAR 23.954, FAR 25.954 and FAR 25.981 certification requirements have identified the need for high-current capable flexible fluid couplings. The coupling assembly does not require inspection and maintenance to remain current capable for the life of the aircraft.
It is important to simulate the in-service wear and damage experienced by the assembled coupling if it is to remain capable of carrying current for the life of the aircraft. The test procedures in this specification simulate a worst case wear and damage condition for the assembled couplings.
Interchangeability of vendor parts must be qualified by design, test and/or analysis.
CAUTION: Although the AS5830 coupling and sleeve will fit on AS1650 ferrules due to the use of common O-rings, the combinations of these parts are not qualified. Using AS5830 parts on AS1650 ferrules may result in leakage and/or premature failure of the joint and does not produce a high current capable joint.
WARNING: The use of AS1650 parts with AS5830 ferrules is not qualified. Assembly of worn AS1650 parts with AS5830 ferrules may be possible but could result in leakage and/or premature failure of the joint and does not produce a high current capable joint.
Rationale
AS5830 has been reaffirmed to comply with the SAE five-year review policy.
Recommended Content
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Ground Vehicle Standard | LEAD-FREE SOLDER VALIDATION TEST PLAN |
Topic
Data Sets - Support Documents
Title | Description | Download |
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Unnamed Dataset 2 | ||
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TABLE 1 | PHYSICAL REQUIREMENTS | |
TABLE 2 | COUPLING COMPONENTS | |
TABLE 3 | ASSEMBLED COUPLING MAXIMUM ALLOWABLE CURRENT VALUES | |
TABLE 4 | SPECIMENS REQUIRED FOR QUALIFICATION | |
TABLE 5A | LIFE CYCLE TEST SCHEDULE AND SEQUENCE | |
TABLE 5B | NON-LIFE CYCLE TEST SCHEDULE AND SEQUENCE | |
TABLE 6 | TUBE SIZE AND WALL THICKNESS USED FOR QUALIFICATION | |
TABLE 7 | SINUSOIDAL RESONANCE DWELL VIBRATION LEVELS | |
TABLE 8 | SINUSOIDAL RESONANCE DWELL TEST TIMES | |
TABLE 9 | CORROSION TEST SEQUENCES | |
TABLE 10 | SYSTEM IMPULSE LOADS AND SPRING BEAM DIMENSIONS | |
TABLE 11 | IMPULSE TEST FIXTURE MATERIALS | |
TABLE 12 | PRESSURE IMPULSE TEST STEPS PER TEST PERIOD |
Issuing Committee
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.Reference
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