Wiratchant shot a 3-under-par 69 Saturday and finished at 16-under 272 for his 14th tour victory, one win more than previous record holder Thongchai Jaidee.
Wiratchant won his first title in 1996 and tied Jaidee with his victory at the Queens Cup.
Wiratchant, who said he had trouble making the cut in his rookie year, finished three strokes ahead of Gaganjeet Bhullar, who carded a 66 in the final round.
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