Leading 20-17 at the interval, Chipu coasted to a 34-24 win over Zimbabwe in Africa U20 action in Antananaravivo on Thursday afternoon.
Chipu's try scorers were Joshua Macharia, Steve Keter, William Diffu and Michael Kimwele with Henry Ayah adding four conversions and two penalties.
Head Coach Paul Odera, communicating with Kenya Rugby after the match said, "Our defensive system held under the pressure. Our tackle technique was good on most occasions and the confidence to attack from deep in our half got us two tries."
The result sees Chipu through to the final where the winner of the second clash between Namibia and Madagascar awaits them.