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T.D. Williamson, Inc. (TDW) was founded in Tulsa, Oklahoma, in 1920. Today, as the leading piping maintenance company, TDW designs and manufactures engineered systems for monitoring, pigging, tapping, plugging, joining, and inspecting essential piping systems, and also provides these services, whatever the needs are:
Hot Tapping and Plugging of Under-Pressure Piping Systems
Pigging Products
Pipeline Cleaning Services
KALIPER Geometry Inspection
MFL In-Line Inspection (MAGPIE)
Gas Leak Detection Products（GAZOMAT）
Leak Repair Clamps and Composite Repair Wrap
Remote controlled offshore pipeline pressure isolation service
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