Design and engineering
Typically an integral foam dam will be engineered to match the tank and tank seal involved. As mentioned maerials would either involve galvanise steel or stainless steel, where the latter obviously represents the longer lasting alternative. Delivery will include an as-built drawing for the integral foam dam as well

Installation
CTS is certainly able to install an integral foam dam for any tank, but our extensive drawings and installation manuals will facilitate you to have either your own staff or contractor staff installing the integral foam dam as well. Advantage of having your own (contractor) staff installing the system could be significant, reducing travelling and staying costs. Experienced CTS supervision will be available on request

Conventional welded foam dam
Traditional foam dams are welded steel structures, usually welded to the top of the pontoon area and equipped with drain holes. Major concern is the fact that this foam dam is trapping rain, corrosion from the tank shell and any product scraped from the tank shell by the secondary seal or flowing down as a result of the tank shell being warmed up from exposure to bright sun light. As a result of the drain holes getting blocked with this debris the water will accumulate and expose the rim angle to aggressive corrosion (see picture). Both foam dam modifications and replacements as well as rim angle replacements will result in major refurbishing costs for external foating roof tanks.

Deal with these aspects once and for all by installing a CTS integral foam dam

Integral foam dam during test session