Skip to Content
mobile menu

Our fully bonded, larger-diameter composite linepipe, FlexFlow Linepipe (FFLP) is making a big impact in the market with a 750 psi pressure rating.

Available in 6" and 8" internal diameters, the FFLP layers include a high-density polyethylene liner, glass fiber-reinforced thermoplastic tapes and a high-density polyethylene outer jacket. The entire pipe construction is fully bonded through heat and pressure application during the manufacturing process. Pipe segments are connected with reinforced electrofusion fittings.


Successful design verification testing for FFLP includes short-term burst, long-term high temperature holds, long-term elevated pressure testing, impact, pressure and thermal cycling, bend flexibility and gas exposure. Several field handling trials and early adopter installations have been conducted to validate suitability for handling and installation in harsh climates.


Using a hydraulic press, FlexFlow Linepipe is inserted into the electrofusion coupling. A current is then passed through the wire coils, generating heat and completely bonding the pipe and coupling together for an extremely reliable, permanent connection. The entire connection process takes approximately eight minutes and is extremely reliable.


6" FFLP provides comparable flow rates versus 10" SDR 7 HDPE and 8" FFLP provides higher flow rates versus 12" SDR 7 HDPE for produced water applications due to higher allowable pressure drop with FFLP. FFLP is not required to de-rate for any hydrocarbons present, and can transport significantly more footage than HDPE per truck load thanks to lower internal diameter of FFLP meeting flow requirements.


With a minimum operational bend radius of 10 feet (3 meters) for 6" and 13 feet (4 meters) for 8", FFLP eliminates the need for expensive accessories such as custom bends, elbows and risers. This high flexibility allows for the use of inexpensive installation methods such as plowing and pulling through failed steel lines.


Our FFLP larger-diameter solution offers superior resistance to corrosion, impact and pressure, high flexibility, enhanced fitting reliability and fast, cost-effective installation. Supplied in standard lengths of 40 feet (12.2 meters), FFLP also minimizes shipping and field handling costs.

Linepipe Products

FlexFlow Linepipe

Available In:

6" and 8" ID sizes
Maximum operating pressure of 750 psi


Data Sheets

FlexFlow Linepipe (English)


FlexFlow Linepipe (Spanish) 


Case Study

FlexFlow Case Study

Find an office

Find an office

Let us help you with your pipeline integrity challenges

Our Locations
Need more information?