Profile: C T S Fabrication U. S. A. is a producer of copper flange fittings. Our products are CTS roll grooved flange, CTS reduction flange, CTS black steel flange and CTS spigot flange and CTS flange 125, 150 & 300 LB. Our products are used for commercial, institutional and industrial applications. CTS Flange is suitable for all brass companion flange applications and all butterfly and flanged gate valve installations along with pumps, boilers, chillers and backflow devices.