In my statefulset I defined volumeClaimTemplates. Added definition of storageclass. After deployment I have PVC, PV and SC created. Reclaim policy is Delete. However after performing helm delete <> --purge all resources are deleted except PVC's

I use kubernetes.io/cinder for dynamic provisioning.

Below pvc

NAME                            STATUS    VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS          AGE
data-x-kafka-0                  Bound     pvc-db37bd17-fe35-11ea-8161-fa163efa0a08   16Gi       RWO            sc-name               7m

Below pv

NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS    CLAIM                               STORAGECLASS          REASON    AGE
pvc-db37bd17-fe35-11ea-8161-fa163efa0a08   16Gi       RWO            Delete           Bound     ns/data-x-kafka-0                   sc-name                         12m

Could you please give me direction, where I am mistaken?