Definition(s)
IPU
Integrated pipeline umbilical.
Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global Standards
IPU
An IPU is typically an assembly of small-bore components such as service lines, chemical injection lines, hydraulic lines, electrical and/or fibre optic cables, etc. arranged around a larger central production, injection or service line. If flexible pipe is used for the central line, it is common to use thermoplastic hoses for the small-bore fluid lines, however metal tubes can also be used in this configuration. If such an IPU type arrangement is also used on the seabed, then typically the tail end of the IPU is simply pulled up and suspended from the FPS in order to avoid additional connections in the lines.
Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global Standards