Fittings

Tapping fittings are either bolted or welded to the line. A tapping/drilling machine is attached to the fitting through a valve and the tap is made. If the valve is permanent, a branch connection can be made, allowing flow through the outlet.

Full-Circumference Tapping Fittings
Tapping fittings are full-branch or reducing-branch split tees designed for use with TDW tapping machines. They are equipped with ANSI Class 150, 300, 600, 900 or 1500 (SI PN 20, 50, 100, 150 or 250) weld neck RF or RTJ flanges. The reducing-branch split tee fitting can also be furnished with LOCK-O-RING Flanges for use as bypass fittings. Full branch fittings are available in 4" - 60" (100-1500 mm). Reduced branch fittings are available in any size or pressure configuration to meet our customers needs.

STOPPLE Fittings
STOPPLE Plugging Fittings, 4" and larger, are full branch fittings. They are equipped with LOCK-O-RING Flanges and plugs which are used as a means of recovering the tapping valves after a STOPPLE Plugging operation. After the plugging job is completed, the LOCK-O-RING Plug is installed in the fitting flange and LOCK-O-RING segments are extended into a groove in the plug, holding the plug in place. An o-ring in the plug provides a pressure tight seal. After it has been confirmed pressure tight, the tapping machine and valve are removed, and a blind flange installed. At a future date, the blind flange may be removed, a valve installed and the LOCK-O-RING Plug may be removed, regaining access to the pipeline.

Thread-O-Ring Fittings
Thread-O-Ring Fittings are used with TDW STOPPLE Plugging Machines as purge and equalization fittings. They can be installed during new construction and used for blowdown connections on either side of a block valve.
Thread-O-Ring Fittings are available in 2" and 3" (50 and 80 mm) sizes. The 2-inch fitting has a maximum pressure of 3600 (248 bar) psi, and the 3-inch 1500 psi (103 bar).

T.D. Williamson, Inc., PO Box 3409, Tulsa, OK 74101. Tel: 918-447-5100; Fax: 918-446-6327.