How do I install natural gas line (pipe) ?

How do I install natural gas line (pipe) ?

You use threaded joints and black iron pipe and fittings.

I say this with all love and caring. If you have to ask how to do gas pipe, you don't want to do it. If you do water pipe or sewer pipe and there is a leak all that happens is something gets wet.

If you have a mistake with natural gas things can go "boom"

Always use a professional when doing gas lines.