The UAE's pipeline network spans generations of coating technology, from coal tar enamels and tapes of earlier decades to modern FBE and three layer systems. As integrity surveys and dig ups reveal aged coatings breaking down, rehabilitation programmes replace protection kilometre by kilometre, and the material logic differs from new construction.
Why rehabilitation favours liquid systems
A dig up presents irregular, pitted, previously coated steel in a trench, not new pipe in a plant. High build liquid epoxies conform to profiled and repaired surfaces, transition smoothly onto surviving adjacent coating, build 500 microns plus in one or two passes, and verify immediately by gauge and holiday detector. Where old coal tar or tape residues resist full removal, surface tolerant grades and careful specification bridge the practical gap between ideal and achievable preparation.
The sequence in the trench
Expose and clean, assess steel loss and repair per integrity engineering, blast accessible steel to ISO 8501-1 Sa 2.5, feather and abrade the tie in zones onto sound existing coating, apply to specification, holiday test, then backfill with padding that protects the new film. The coating step is rarely the schedule driver, but a failed holiday test repeats the whole access cost, which is why material quality and application discipline dominate the economics.
Old coatings carry their own cautions
Coal tar era materials require controlled handling and disposal; test and plan before grinding into unknown black coatings. And disbonded old tape that shielded cathodic protection may hide corrosion beyond the visible dig, an argument for generous exposure windows at each rehabilitation site.
MENA Industrial Supplies stocks rehabilitation epoxies and abrasives in Dubai with staged delivery to right of way sites across the UAE, quoted via the oil and gas coatings page.