Williams Partners LP announced its expanded Geismar plant is in the final stages of commissioning and now expects ethylene production for sale to begin in December.

"Some of these commissioning activities have taken longer than originally planned, but as we have stated throughout this process, safety is our number one priority," said John Dearborn, SVP of NGL and petchem services. "And I want to thank our Geismar team for its focus on safety throughout this complex expansion and rebuild effort."

Capacity at the Geismar plant is now 1.95 billion pounds of ethylene per year. Williams Partners’ share of the total capacity of the expanded plant is approximately 1.7 billion pounds per year.