Which knot can be used either vertically or horizontally to move pipe?

The pipe hitch is specifically designed for securing pipes and is versatile enough to be used in both vertical and horizontal orientations. This knot allows for a firm grip on the pipe, enabling it to be lifted or pulled securely during handling. The structure of the pipe hitch provides stability and minimizes the risk of slipping, making it particularly useful in the context of moving pipes.

On the other hand, while the clove hitch is used for securing a rope around an object, it is not as effective as the pipe hitch when specifically handling pipes, especially when the load orientation changes. The bowline creates a fixed loop at the end of a rope and is useful for various applications but does not secure the pipe in the same way as the pipe hitch. Lastly, the square knot is primarily used for tying two ropes together rather than securing a load like a pipe, which makes it unsuitable for this particular task.