Test and Test Procedures for SAE 100R Series Hydraulic Hose and Hose Assemblies J343_201605

DOI: https://doi.org/10.4271/J343_201605

Issuing Committee: Hydraulic Hose and Hose Fittings Committee

Publisher: SAE International

Pages: 9

Rationale: The formula for hose free length and manifold spacing is impacted by the dimension d in J343 and ISO 6605. In Figure 1 the distance for the manifolds is defined as 2r+d; where r is the bend radius and d is the hose OD. In defining the free hose length the formula is π ( r + d 2 ) + 2 d for hose up to OD of 22mm (180deg bend) and π / 2 ( r + d 2 ) + 2 d for hose larger than OD of 22mm (90deg bend). In Figure 1 there is a note that says: “For values of d less than 25.4mm, use d=25.4mm in the expression for the hose free length…..” (This is also the same for ISO 6605). The note should read: “For values of d less than 25.4mm, use d=25.4mm for the 2d term in the expression for the hose free length…..” (This is what ISO 6803 reads and is correct). When d is applied to all terms (d and 2d) it makes the hose shorter and the manifolds farther apart.