I can only speak for myself here.
I average about an hour per bowl. There are 24 hours in a day but I sleep 8 of them. That leaves 16 hours available. I'll subtract an hour for things like meals, etc.
That's a maximum of 15 bowls for me.
That's in theory.
In reality I sometimes go a week or two without smoking at all but sometimes I go through 5-10 bowls over the course of a weekend.
Considering the above, it's clear that as long as you're not damaging the pipe you can smoke 1 pipe however much you feel like smoking.
There really is no rule or metric that applies.
I average about an hour per bowl. There are 24 hours in a day but I sleep 8 of them. That leaves 16 hours available. I'll subtract an hour for things like meals, etc.
That's a maximum of 15 bowls for me.
That's in theory.
In reality I sometimes go a week or two without smoking at all but sometimes I go through 5-10 bowls over the course of a weekend.
Considering the above, it's clear that as long as you're not damaging the pipe you can smoke 1 pipe however much you feel like smoking.
There really is no rule or metric that applies.