Hole in Steam Heating System Pipe
We have a steam heating system and years ago an access panel was installed for other plumbing. Unbeknownst to us (we just purchased the home) a screw from the install penetrated one of our pipes. We needed to remove the panel, and we must have "broken the seal"; now the pipe leaks steam when our boiler is on - not good.
Is it possible to plug the hole in some way without having to remove and replace the pipe?
I'm not sure if it's cast iron - could be lead? Was that common material for heating system pipes in the early 20th century? Our house was built in 1924, fwiw.
Thanks for any input!