Pieters was accused of going to ground too easily when he was caught in the face by Kasami's hand during the 1-0 victory for Fulham at Craven Cottage.
However, the Dutchman insists that the offence was worthy of a sending-off.
"It was a red card because he hit me in the face," he told the Stoke Sentinel. "There was contact, no question for me, and I am not going down on the ground for nothing."
Stoke are currently in 16th place in the Premier League table.