It looks like SW damage to me. I lost a number of trees from that before I realized the cause and started painting the trunks to solve the problem. Paint the South and West sides of the apple tree trunks with a mix of 50/50 white interior latex and water mix and the SW injury problems will decrease.
Most of my damaged trees recovered on their own, but as mentioned above, your metal tube might hold moisture and cause issues. I'd remove all of the fruit off that tree this year and take off that metal tube. Let the tree trunk breathe and repair itself and hopefully it survives.