Heavy-Wall Power Piping

Challenge
A contractor, Slattery Skanska, had to weld 40,000 linear feet of 2.5″ – 42″ OD, up to 2″ wall P-22 and P-91 pipe. Unit 40 was a new 250 mw combined cycle plant. Work was done in an exposed location during winter. P-91 requires a 450 – 500°F (230 – 260°C) preheat, significantly impacting manual welding productivity. Location: Ravenswood Unit 40 Power Plant, Long Island City, NY.

Solution
Slattery Skanska used the Pipeliner II FCAW system which can deposit 7 lbs/hr of metal – 14 times higher than conventional manual stick (SMAW), with negligible repair rates. Productivity was further improved by allowing the welder to operate the equipment at a comfortable distance from the hot pipe.

George Ryder, Welding Superintendent, “You really have been a great help to Skanska and we appreciate all your support. It’s a pleasure to deal with such a great company.”