How to make a simple triangular origami tube

(page 2)

1st picture of simple triangular origami tube

01.

Let's start with the back side of the paper facing up.

Prepare to apply a horizontal valley-fold and then unfold.

2nd picture of simple triangular origami tube

02.

Apply the horizontal valley-fold of the step #1 and then unfold.

Prepare to apply a horizontal "gate-fold" and then unfold.

1 2 3 4 5 6