Source: T.D. Williamson, Inc.
WEDGE-LOCK Pipe Plugs are used for plugging pipe ends temporarily during such operations as testing piping and vessels, welding fittings to pipe ends without hazard of flammable vapors, and propelling pigs by compressed air. WEDGE-LOCK Pipe Plugs are available in sizes 2" through 14", and each size seals a variety of pipe inside diameters.
T.D. Williamson, Inc., PO Box 3409, Tulsa, OK 74101. Tel: 918-447-5100; Fax: 918-446-6327.