I am in the process of remodeling a second floor bathroom in my house. It's an old house. There was no heat in the bathroom before, so I plan to add a small wall-mounted gas heater. I have run black gas pipe down from the bathroom, along the stack in a corner wall, and into the basement where I'll tie it into an existing gas line. It was hard to get the pipe to come out into the basement. I ended up (intentionally) bending a 45* angle about 8-10" up from the end of the pipe so the very end of it would poke out from inside the wall into the basement where I could see it and get a hold of it.
I'm happy with how running the pipe has turned out; I don't feel there is any issue there. I have just got to wondering if it was ok that I bent the pipe. Is there any issue/concern with bending black gas pipe? It's 1/2" pipe. It was hard to bend; it seems pretty stout. It is all indoors - along the basement ceiling, inside the wall, and in the bathroom floor.