1.1 This document covers the requirements for specification of and the acceptance conditions for raw materials, properties, and testing of materials utilized for the factory manufacture of fiber reinforced plastic (FRP) tanks, for use above ground or underground. 1.2 The FRP tanks made of polyester, vinylester or epoxy resin system reinforced with glass fibers, carbon fibers, or their combination, manufactured by the wet lay-up and/or filament winding processes. Constructions both with and without a lining of thermoplastics are included. 1.3 This specification applies to stationary tanks used for the storage, accumulation, or processing of corrosive or other substances at pressures not exceeding 15 psig external and/or 15 psig internal above any hydrostatic head. 1.4 The process for the material specification and quality control tests according to this document is shown in flowchart, Figure A of the Appendix A.