Can you use a PVC compression tee on a steel pipe?

I am installing an irrigation system in my front yard and dug out the main water line past the water meter. The pipe is gray metal which I believe to be galvanized steel. I was going to cut the pipe and put a PVC compression tee on it to run to the irrigation shutoff valve and zone valves etc. However, I read somewhere that you shouldn't use a PVC compression tee on a steel pipe. Is this true or is it alright to do this? The line is in good shape with no apparent corrosion.