In 2013, we headed to Veracruz, Mexico to tackle a challenging rehabilitation project involving 20” and 30” operational gas lines.
The issue? A failing external coal tar epoxy (CTE) coating on an active pipeline.
The constraint?
The customer could not shut the line down.
Anyone who has worked around gas transmission lines understands the physics at play.
A cool gas line operating in a warm, humid coastal environment like Veracruz is practically guaranteed to sweat. Once the deteriorated coal tar epoxy was removed, significant condensation formed on the pipe surface.
That immediately eliminated several conventional recoating options:
Traditional two-part epoxies
Standard liquid paints
Systems requiring abrasive blasting and a defined anchor profile
These products demand dry surfaces and controlled conditions. This project had neither.
The solution would need to be:
Water tolerant
Able to displace moisture
Applied without complex equipment
Installed safely on an active line
The Approved Solution: Stopaq Wrappingband WSH
The system submitted—and ultimately approved—was Stopaq Wrappingband WSH.
WSH is a fascinating viscoelastic coating technology designed specifically for difficult surface conditions.
Why It Worked
1. Water Displacement Technology
WSH actively displaces surface moisture during application. Instead of fighting condensation, it works with it—pushing water away from the steel and bonding directly to the substrate.
2. Minimal Surface Preparation
The pipe surface only needed to be free of loose materials.
No abrasive blasting.
No anchor profile requirement.
3. Simple Application
The system is applied by hand.
No plural-component pumps.
No spray rigs.
No specialized curing equipment.
Hand tension is all that’s required when installing the outerwrap.
The Result
No shutdown
No production loss
No sandblasting
No complex logistics
Just a practical, field-applied solution that restored corrosion protection while the line remained fully operational.
Projects like this highlight an important lesson: sometimes the right solution isn’t the most complicated one. It’s the one designed for the real-world conditions you’re actually facing.
In Veracruz, that meant choosing a coating system that could handle moisture, humidity, and live operation—without compromise.
No comments:
Post a Comment