Integrated Service Umbilical (ISU™1)
Structure in which the inner core is a standard flexible pipe construction. NOTE 1 Umbilical components are wound around the core pipe and covered with a protective outer sheath (see 4.3.6). NOTE 2 ISU is a trademark of Coflexip Stena Offshore. 1) ISU™ is an example of a suitable product available commercially. This information is given for the convenience of users of this part of ISO 13628 and does not constitute an endorsement by ISO of this product.
Source: API RP 17B, Recommended Practice for Flexible Pipe, Fourth Edition, July 2008. Global Standards