Langer, who won the event in 2010, had three birdies on each side at Turnberry in Thursday's play. He has a one-stroke lead over Mark McNulty, who was also bogey-free in the first round.
Langer started strong with birdies at Nos. 2 and 3 and made the turn at 3-under after a birdie at 7.
He had back-to-back birdies at 11 and 12 before a birdie at 17 got him to 6-under.
McNulty opened with two birdies and matched Langer with birdies at 7 and 17. His other birdie came at the 10th hole.
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