Subsea Electro / Hydraulic Control Umbilical Pre-commissioning

Umbilical pre-commissioning is the suite of tests performed from a host facility, usually an offshore platform or a Floating Production, Storage and Offloading (FPSO) vessel, to confirm the mechanical and structural integrity of a newly installed umbilical(s) and associated infield electrical, hydraulic and, in some instances, fibre optic functional connections. Post-hook up testing is performed using temporary equipment set up within close proximity of the hang-off location on the host facility in order to minimise the routing of high pressure test hoses, in particular away from walkways and adjacent worksites where possible.

These functional connections are made through the use of dedicated electrical, hydraulic and optical flying leads which allow the conveyance of hydraulic power, communication and production chemicals / service fluids via the umbilical(s) connected between the host facility and the Subsea Production System (SPS).

System design and complexity ultimately dictate the pre-commissioning testing philosophy and it may prove beneficial to perform sequential testing using a systematic approach, allowing earlier detection and potentially an easier diagnosis of any faults, their type and location.

Pre-commissioning testing is generally performed in accordance with ISO 13628-5:2009 - Petroleum and Natural Gas Industries — Design and Operation of Subsea Production Systems, Part 5: Subsea Umbilicals.

For an overview of umbilical pre-commissioning please download our technical note.