Frequently Asked Questions

1 Diameter range IFL
Q: In which diameters is IFL available?
A: Any diameter between 6 inch and 18 inch is possible.

2 Length limitations of IFL
Q: In what length range is IFL available?
A: The Kevlar core provides the liner with an extremely high tensile strength, thus enabling the insertion of single lengths of multiple kilometers of liner, dependent on the diameter. Please consult IFL Technical Department for more detailed information.

3 Bends & expansion loops
Q: Can IFL accommodate 5D & 3D bends and expansion loops?
A: IFL will accommodate any pipeline configuration in which there are 5D bends or greater, including alignment bends and expansion loops. Please consult IFL Technical Department for more detailed information.

4 Function of each layer in the liner matrix
Q: What is the function of each layer in the liner matrix?
A: Outer layer: Abrasion resistance and protection of the Kevlar core and inner layer during the insertion process. Aramid Core: Provides very high tensile strength and flexibility during installation. Carries all installation loads, and contributes to pressure resistance and secondary containment under operating conditions. Inner: Hydrocarbon, H2S and SRB resistance at high temperatures. Extremely low permeability.

5 Pigging after liner installation
Q: Can you send pigs through after installation of the liner to remove deposits?
A: Yes, but only bare soft foam pigs as these are all that is required given the extremely smooth and non-stick nature of the inner liner.

6 Liner monitoring after installation
Q: How do you monitor permeation of gases through the liner?
A: Vents points at both sides of the riser platform are used to monitor the condition of the liner and to vent off any permeated gasses.

7 Approvals and independent testing
Q: Has the IFL system been extensively tested and qualified by independent laboratories?
A: Yes, all product qualifications were undertaken in conformance with API 15, API 17 and NACE standards, by independent laboratories, while also being subject to third party inspection.

8 Life expectancy IFL
Q: What is the design life of the liner?
A: Accelerated aging tests have provided evidence to support a minimum life expectation of at least 30 years. Tests are on-going and in reality, the actual life expectancy may be much longer than this.

9 Delivery Lead Time IFL
Q: What is the delivery period of IFL?
A: Reels of the most commonly used liner diameters are strategically stocked in various geographical locations so as to ensure the shortest possible delivery period. In any event, it should be possible to turn around any engineering and product manufacture and delivery within a 4 to 6 month period.


Key Benefits

  • Cost-Effective Compared to New Lay
  • Saves Time in Design, Planning and Installation
  • Extends Pipeline Service Life > 30 Years
  • Protection of Environment Due to Dual Containment
  • Multiple IFL Systems Already Installed in Hydrocarbon Subsea Pipelines

Technology in Line

  • Multiple Kilometers Installed in Single Pull
  • Accommodates Multiple 90° Bends
  • Resistant to Hot Sour Crude Oil and Sour Gas
  • High Temperature Resistance up to 110°C in Hydrocarbon Exposure Conditions
  • Extremely High Resistance to Permeation