Allowable Bend Radius
Minimum radius to which an umbilical, at a given tension, may be bent to without infringing design criteria or suffering loss of performance. See Figure 1. NOTE 1 The bend radius is measured to the centreline of the umbilical. NOTE 2 Allowable bend radius increases with increasing tensile load and varies depending on internal pressure and condition, i.e. safety level.
Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global Standards