High pressure high temperature (HPHT) pipelines have specific metallurgy, coating, and design issues. Metallurgy selection needs to consider high strength materials to limit wall thickness whilst taking into account material de-rating and suitable high temperature coatings. Design issues include:
Fluor has developed solutions for HPHT pipelines for pressures up to 10,000psig and temperatures of 160˚C, for both buried and surface pipeline, working to ASME and SNiP codes. More recent analysis has included buried loop solution for flow lines.