I am not a big fan of wireless communications inside a plant. That being said, it should work just fine. As long as the process is not critical.

What you have to remember is that the antenna is (should be) mounted on the tank/building, so it shouldn't be affected by motors... very much. If you have a good shielded cable, going to the radio (which should be in a shielded cabinet), then chances are pretty good that it will work just fine.

One other thing you must consider is the protocol. If is deterministic (makes sure the message/data got there intact), it will either retry, or notify the software that the communications have failed. As long as it is not critical, or your operations have enough time to react it's fine.