Diamond Fiberglass

Diamond Fiberglass, now part of Andronaco Industries, operates from Victoria, Texas as an ASME RTP-1 certified custom fabricator of fiberglass-reinforced plastic (FRP) tanks and vessels for corrosive service environments. With over four decades of experience in composite fabrication, the company engineers and manufactures a broad range of FRP products including single-wall and double-wall storage tanks, process vessels for continuous and batch operations, mix tanks, large-diameter shop-built tanks, FRP piping systems, and custom fiberglass composite structures. Their ASME RTP-1 certification — the fiberglass industry's most rigorous vessel standard — is maintained through annual third-party audits and full program recertification every three years. Diamond Fiberglass serves water and wastewater treatment, air pollution control including flue gas desulfurization, chemical processing, food manufacturing using FDA-approvable materials, power generation, pulp and paper, landfill, and semiconductor fabrication. In the water and wastewater sector specifically, they supply scrubbers, bio-scrrubbers, activated carbon adsorption units, process vessels, and storage tanks for both municipal and industrial treatment plants. The company provides capacity charts for vertical cone-bottom, flat-bottom, and dish-bottom tank configurations, along with detailed flange dimension references and handling and installation guides. Their field services team of certified fiberglass professionals supports installation, inspection, and repair.