TDW 3-WAY TEE IDEAL SOLUTION FOR TIE IN
10”x 10” 3-WAY TEE on the main line with sandwich valve
A gas operator in PA who was building a compressor station needed to tie in a new branch line to an existing 10 inch natural gas gathering line that was running at 950 psi. The customer did not want to have a buried flanged connection underground and were proposing to weld on a standard fitting, add a long pup piece to the fitting, attach a ball valve to the pup piece, and then bolt on the new 10 inch line to the valve above ground level. There were challenges in terms of the stack up. One issue was the length of travel that a tapping machine would have to navigate, the line needed a pup piece to be welded on, and the 10 inch main line was pigged and needed to remain so.
As an alternative, the Kerr and TDW specialists recommended to the operator to use a 10 inch by 10 inch Full Encirclement 3-WAY Tee with LOCK-O-RING ® Flange and LOCK-O-RING® Completion plug with flow through pig guide bars. This solution had multiple advantages. It eliminated the need for a long pup piece. There would not be an issue with the length of travel the tapping machine would have to navigate, and the line would remain piggable. The gas operator agreed.
LOR plug with pig flow through guide bars being attached to the tapping machine.
For this project, TDW technicians performed the welding of the 3-Way Tee fitting and the 10 inch branch line to the side outlet of the fitting. The Technicians operated the 10 inch Hot Tap and set the completion plug with the pig guide bars.
The result for the gas operator was a new branch line tied in with the 10 inch main line able to be pigged. This was the end result the customer required.
A successful result with a new branch line and 10” main that can be pigged.
To learn more about TDW Pigs or find Resource guides, see TDW Pig Resource page.
If you have questions, please contact the Kerr Engineered Sales Company who are also available for team for presentations, lunch and learns and customer visits.
