Page 489 - Pipelines and Risers

456 Chapter 24

The electrical cable shall be in continuous lengths to avoid splices and shall have suitable
outer isolation to provide
0 The electrical connectors shall be electrically isolated from the cathodic protection system
of the bundle to avoid build up of calcareous layer on the metal parts.
0 Components shall be located to minimize temperature effects.
0 It must be possible to individually replace any pipeline or control jumper as well as any
electrical jumper.
0 Connection system should be compatible with the flowlines connection system.
Future extension of the system should be planned for.

24.3.8 Design Loads
Load Definition
The following loads shall be considered in the design of the bundle system:

Weight: Self-weight of pipe, coatings, attachments, and transported contents;
Buoyancy: Displacement of carrier pipe;
Pressure: Internal, external, hydrotest, pressurization of carrier and sleeve pipe;
Expansion: Due to product temperatures and pressures;
Prestressing: Permanent curvature, permanent elongation;
Constraint: Of bulkheads, carrier pipe, towhead assemblies;
Launch Loads: Launch tension, environmental loading;
Towhstallation: Loads due to tow and installation tension, tow and installation
environmental loading and bundle submerged weight;
Accidental: Dropped objects etc.;
Environmental: Waves, current and other environmental phenomena plus loads due to third
party operations;
Hydrodynamic: Loads induced due to the relative motion between the bundle and the
surrounding seawater.
Tie-in: Loads induced due to pull-in and connection operation as well as running of the
connection tool.

Temporary Phase Lo&
The temporary phase loading to be addressed as part of the bundle component analyses are
summarized below:

Lifting and support during fabrication,
Sheathing of the sleeve pipes with applied tension to flowline and sleeve sections.
Sheathing of the carrier pipe over the sleeve pipe,
Support of inner bundle on the sleeve pipe.