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i�rl �II�CUWAM Laminate Construction Maintenance and Inspection The service life that can reasonably be expected from corrosion -grade composite equipment will vary depending upon a number of factors including fabrication details, material selection, and the nature of the environment to which the equipment is exposed. For example, a tank that may be expected to provide service for 15 years or more in a non-aggressive environment may be deemed to have provided an excellent service life after less than 10 years of exposure to a more aggressive media. Other factors, such as process upsets, unanticipated changes in the chemical composition of equipment contents and unforeseen temperature fluctuations, may also reduce the service life of composite products. These are some of the reasons why a program of regularly scheduled inspection and maintenance of corrosion -grade composite equipment is vital. A secondary benefit is the reduction of downtime and minimization of repair expenses. Beyond issues of cost and equipment service life, the human, environmental and financial implications of catastrophic equipment failure cannot be understated. A regular program of maintenance and inspection is a key element in the responsible care of chemical processes. Selected Applications Recommendations Abrasive Materials Composite pipe and ducting can offer significantly better fluid flow because of their smooth internal surfaces. For products designed to carry abrasive slurries and coarse particulates, the effects of abrasion should be considered during the product design process. Resistance to mild abrasion may be enhanced by using synthetic veil or, for extreme cases by using silicon carbide or ceramic beads as fillers in the surface layer. Resilient liners based on elastomer - modified vinyl ester resin are also effective in some cases.