Labor unions went on strike Friday at Chevron Corp.’s Gorgon and Wheatstone LNG export terminals in Western Australia, and no further negotiations over pay and working conditions are planned, the company said. 

LNG

Periodic work stoppages started at 1 p.m. Perth time Friday and will now occur in blocks over the course of several hours each day until Sept. 14. If no deal is reached by that day, the unions are scheduled to stop all work and halt liquefied natural gas exports from the facilities, which have a combined capacity of 25 million metric tons/year. 

The Offshore Alliance (OA), a partnership between the Australian Workers Union and the Maritime Union of Australia, had postponed the start of strikes Thursday to allow for another round of negotiations that yielded no results....