Belzona 3412

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What are common problems with flanges?

One of the most common issues with flanges and their fastenings is corrosion, which can lead to joint failure, leaks, and costly downtime. This includes:

Crevice corrosion, which occurs in the narrow gaps between flange faces and around bolts where moisture and contaminants become trapped.
Galvanic corrosion, which happens when dissimilar metals (e.g., stainless steel bolts and carbon steel flanges) come into contact in the presence of an electrolyte.
Atmospheric corrosion, caused by long-term exposure to humidity, salt spray, and pollutants in the air.

Protective systems like Belzona 3412 are designed to encapsulate the entire flange assembly, preventing moisture ingress and isolating metal surfaces which significantly reduces the risk of corrosion.

How can I protect flanges from corrosion without dismantling equipment?

Belzona 3412 can be brush or spray-applied directly over flanges and pipe joints, forming a seamless, peelable membrane that seals out moisture and contaminants, all without the need for disassembly.

Is there an alternative to traditional flange protectors like mechanical covers, clamps and polymer tapes?

Yes, unlike tapes or bolt caps, Belzona 3412 adheres tightly to irregular surfaces, won’t shift or degrade over time, and can be cut and resealed for easy inspection, making it a superior flange protection solution.

How do I prevent moisture ingress in flange joints?

Moisture ingress is a leading cause of crevice corrosion in flanges. Belzona 3412 seals the entire flange assembly with a continuous membrane that prevents water ingress.