Profile: T.D. Williamson, Inc. is a global manufacturer and services provider of pipeline maintenance equipment including tapping, plugging, fittings, pipeline freezing, pipeline inspection and cleaning services, scraper traps, closures, signals, launchers, receivers and pigs. We modify pipe systems under pressure and under flowing conditions. Our methodology permits pipeline and plant piping to be changed or repaired without loss of service or shutdown of the system. The process will work on such systems as natural gas, crude oil, gasoline, propane, hydrogen, water, wastewater, air, steam and most chemicals. We develop specialized fittings and technologies to keep pipe systems in service, under pressure and flowing conditions so that essential process service never has to be shut down or taken out of operation in order to perform planned or emergency maintenance functions.