I make pipes by rolling out a 6 inch piece of clay on the table. Take a long stick or artist paint brush handle and stick it thru the 6" stem by wetting the end of handle, stopping 1/2 inch from end, leave the handle in the clay and take a needle tool and probe the clay til you find the end, then mark it by wallering the marked area out. Then make a bowl in hour hand or rolling out a piece of clay on the table then attach the bowl to the stem...with the bowl attached, remove the handle... allow it to become leather hard, than carve it when it becomes leather hard with a pen knife to get the shape you want. All my pipes have two openings on each end. A pipe isn't something you need to over think!
I followed you until i marked the area and wallered it out? Did you mean hollowed it out? Also, when i make the bowl, and when i attach the bowl to the stem, how/where do I put an opening hole in the bowl?