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Tell us the pipe diameter, length and service. We will connect you with a certified applicator who can quote the work.
A buried or submerged pipeline is protected by two things working together: a coating that keeps soil and water off the steel, and cathodic protection that guards any spot where the coating is damaged. The coating does most of the work, and it has to survive handling, bending, backfill, soil stress and decades underground. This guide explains the main pipeline coating systems, how field joints and repairs are handled, and where spray polyurethane and polyurea fit.
Most new steel pipelines are plant-coated with fusion-bonded epoxy (FBE) or a three-layer polyethylene or polypropylene system. Girth welds are field-coated with liquid epoxy, heat-shrink sleeves or spray polyurethane and polyurea. Older lines are rehabilitated with high-build liquid epoxy, polyurethane or polyurea. Water pipe often uses polyurethane linings and coatings per AWWA C222. In every case, abrasive-blast prep, film thickness and holiday testing decide long-term performance.
The girth welds made in the field are the weak link in any coated pipeline because they are coated outdoors, in a ditch or on a right-of-way, often in poor weather. Fast-curing spray systems let crews blast, coat, inspect and lower in without waiting hours for cure.
Remove contamination and blast the joint to the specified standard and profile, overlapping onto the plant coating.
Bring the steel to the specified temperature and above the dew point.
Spray or brush the field joint coating to the specified thickness, feathering onto the plant coating.
Check thickness and holiday test before lowering in.
Aging pipelines with failed coal tar, tape or asphalt coatings are excavated, stripped, blasted and recoated in place. High-build liquid epoxies, polyurethanes and polyureas are used because they build thick in one visit and cure fast enough to backfill the same day in many cases.
Steel water pipe and fittings are commonly coated and lined with polyurethane per AWWA C222 or liquid epoxy per AWWA C210. Drinking water linings must be certified to NSF/ANSI/CAN 61. For wastewater, thick polyurea and polyurethane linings resist abrasion and hydrogen sulfide attack. See tank lining and wastewater coatings.
Spray polyurethane foam is also used on pipelines as trench breakers to slow water flow along the ditch and as insulation on above-ground lines. See spray foam trench breakers. For coating contractors, pipeline work is a strong niche; see opportunities.
A certified ArmorThane applicator can coat field joints, fittings, rehab sections and water pipe with spray polyurethane and polyurea.
Contractors: become an ArmorThane applicator
Fusion-bonded epoxy (FBE) is the most widely used plant-applied coating in North America, with three-layer polyethylene and polypropylene common elsewhere and for tougher service.
Yes, for field joints, fittings, rehabilitation and abrasion protection. Confirm the product is rated for the operating temperature and compatible with cathodic protection.
AWWA C222 is the American Water Works Association standard for polyurethane coatings and linings for steel water pipe and fittings.
No coating is perfect. Cathodic protection protects the steel at coating defects and damage, while the coating reduces the current needed.
By measuring film thickness and running holiday detection over the coated surface to find pinholes before burial.
Owners get a certified ArmorThane applicator for field joints, rehab and water pipe. Contractors can add pipeline coating with our equipment and training, with no franchise fee and no royalties.
ArmorThane has built a strong reputation over the past 30 years for producing high-quality, durable protective coatings.
Tel: 417.831.5090
moreinfo@armorthane.com
We want to help you find the best ArmorThane applicator for your protective coating project. Please either fill out the request form below or call us toll free at 417-831-5090, any time Monday-Friday, 8:00 a.m. to 5:00 p.m. Central Standard Time.
Connect with an authorized ArmorThane professional to get a long-lasting, seamless protective coating for your RV. Submit the form below or call us directly at 417-831-5090 (Monday–Friday, 8:00 AM – 5:00 PM CST).
