I do kapalbhati pranayama every morning for 30 minutes at the rate of 50 to 60 strokes per minute with medium force. can this cause hernia in future?

No answer, but...: Your concern is excessive at this time since we are not born equal physically leading to a great difference among all individuals in the strength and structures of abdominal muscles; that is why someone will never get inguinal hernia despite participating in strenuous physical activities lifelong, someone may develop it even without doing any physical straining, and many in between. so, keep on...