Fourth seeded Chinappa, ranked 35th in the world, won 11-4 6-11 12-10 2-11 11-6 against another Indian Pallikal, seeded second, in the USD 8,000 WISPA World tour event.
Both the Indians were neck on neck throughout the tie and matched each other in execution of shots and dead drops for winners.
But Chinappa was able to hold her nerves better and the third game which she won in deuce put pressure on her higher ranked opponent.In the semifinals, Chennai girl Chinappa, ranked 24th in the world, had defeated top seed Ireland's Aisling Blake 7-11 11-5 5-11 11-8 6-11 in 59 minutes.
Pallikal, who recently became the highest ranked Indian in the world, advanced to the summit clash after her opponent USA's Latasha Khan retired in the fifth game.
Both were locked 2-2 (5-11 11-6 8-11 12-10) after the fourth game.