Often used combinations:
"steel pipe", "hard pipe", "cum pipe", "fuck pipe", "hard steel pipe",...
As I watched her finger her wet pussy my dick grew to a hard steel pipe.
That slut deepthroated my cum pipe the other day.
She sucked all the cum out of my pipe.
Pipes tend not to be the preferred method of ingestion for most cannabis smokers - joints and bongs are easier to smoke, and most pipes (using only air-cooling) cause the user to cough when burning material is inhaled. One exception is the Bud Bomb - a well-concealed air-cooled pipe with several filters.
Often called a 'peace pipe' due to the sense of tranquility induced by its use.