Flexibles. Part 4a. Influence of Transported Fluid on the Flexible's Design - Corrosion and Fluid Density

Fluid. The one of the vital points during the pipe design consideration.

• What is the main reason for using the pipe? - Fluid transportation and injection, yes!

In this article, we'll dive into the key issues associated with fluid transportation, how to avoid these issues during the design assessment and material selection.

Corrosive elements

The carcass of the flexible pipe is directly exposed to the fluid and the material must be selected accordingly:

• AISI 304
• AISI 316

• or Super Duplex materials

Materials presented above are commonly used for flexibles. Use of other materials is often limited by the manufacturing process which involves cold forming.

Fluid Density

The design of flexible pipe systems should consider the effect of variations in internal fluid density over the life of the project, particularly for riser systems where a change in fluid density can change the shape of the riser configuration.

To avoid information overdose I decided to divide this chapter in several parts :)

Stay tuned and keep in touch!

Kirill Krotov, SURF Engineer at?Subsea7

References:

1. "Handbook on design and operation of flexible pipes" by?4Subsea
2. Provider of the unlimited video material: https://www.youtube.com/
3. Gasparini