Lab or coupon testing is the initial step that often suggests furan is the correct material for a specific service. This paper will describe historical problems associated with furan equipment fabrication and outline proof tested solutions. Proof testing has two definitions in this paper; first, meaning proof by trial testing and second, the step by step procedure used by the fabricator to assure each phase of manufacture is acceptable. By detailing the proper inspection testing (proof testing) during & after fabrication of furan and finally tallying the costs
of failure for each phase, short & long term savings will be shown.