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Wednesday, October 2, 2013

Protal 7200 Square Footage Coverage

Protal 7200 Square Footage Coverage

      So we looked at coverage in terms of 'field joints' a few days ago (read this for more info).  But what about someone who simply wants to know a square footage coverage estimation for a liter of Protal 7200?  That is fairly simple.

     First, why would someone want that bit of information?  I can think of a couple of reasons.  Maybe they are using the Protal 7200 for repairing damage to the mainline coating.  Maybe they need it to repair significant damage to the main line coating.  Maybe the Protal 7200 is being used for recoat / rehab work.  Maybe they simply want to conduct a per square foot cost analysis of the different liquid epoxy options for a recoat project.  I'm sure there are other valid reasons as well!

     In any case, in order to calculate square footage coverage for the Protal 7200, we must first know how thick of a coating we are intending to install.  As common sense would dictate, a 40 mil coating thickness will require just about exactly twice as much material as a 20 mil coating thickness.  For the sake of this exercise, we are going to pretend that we are working with some line pipe that is coated with FBE and a layer of Rough Coat ARO.  In this case, we are also pretending that the specification requires that the Protal 7200 is installed in a 55 mil thickness.  Pretty thick for an epoxy!

     The theoretical coverage in such a case; 55 mil thickness is 7.5 square feet per liter.  It is important to note that this is (again) the theoretical coverage.  It does not factor in waste; cure time; pot life; application conditions, humidity levels, ambient temperatures, installer competence or any of the other multitude of factors that could play a role.

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