Torque Requirements, Installation and Qualification Test, Hose and Tube Fitting
This Aerospace Recommended Practice (ARP) is intended to establish recommended installation torque values limits and test criterion for machined flared and flareless hose end fitting connections. Assembly of bite-type MS21922 flareless sleeves is not included in the ARP (see MIL-F-18280). This ARP is applicable to two types of connections and two basic material classifications.
Type I - Flared to mate with MS33656
Type II - Flareless to mate with MS33514
Material I - Steel, corrosion resistant steel, and titanium fittings
Material II - Aluminum fittings.