For new engineering designs, SAE International recommends using (Flareless Fitting End Design Standard) or (24° Cone Flareless Fluid Connection). Key Technical Specifications SAE AS33514 document
Technical Report: SAE-AS33514 Standards The is a critical aerospace standard that defines the dimensions and requirements for flareless tube connection fitting ends and gasket seals. It is widely used in high-pressure fluid systems, particularly in military and commercial aviation. 1. Scope and Purpose sae-as33514
), though some versions were marked inactive for new designs as of 2008. Associated Hardware MIL-DTL-27272 Revision D Amendment 2 - DLA "Are you sure
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To appreciate the importance of this standard, it helps to understand the connection method it governs. A flareless fitting creates a seal by compressing a sleeve (ferrule) between the fitting body and the tube, rather than relying on a flared tube end. This offers several advantages:
The development of SAE AS33514 was a collaborative effort between industry experts, government agencies, and standards organizations. The standard was first published in 2005 and has since undergone several revisions, with the latest version being AS33514/1 issued in 2019. The standard is maintained by the SAE Aerospace Council, which ensures that it remains up-to-date and aligned with the evolving needs of the aerospace industry.
