T.D. Williamson (TDW) was established in 1920, originally known as The Petroleum Electric Company. With its corporate office in Tulsa, Oklahoma, with the first manufacturing plant erected in West Tulsa in 1947. TDW now boasts locations on every continent excluding Antarctica with a range of innovative pipeline products. 

PPSC carries TDW quick-opening closures in stock in Houston and Midland as well as TDW Thread-O-Ring (TOR) fittings. If TDW Flanged Thread-O-Ring (TOR) fittings are required, please give us a call.