To put a pipe in a barrel to draw liquid is permitted, but folding a leaf is prohibited as it looks like you are making a utensil.

Chapter 314 Section 6

Being permitted to make a hole in a utensil only if it was broken and put back together is true for the holding part of the utensil. However, making a hole in the cover even if it was never broken, since the hole is on top which is not the norm as dirt could come in, it is permitted.

Chapter 314 Section 7

A rope used to latch a box closed, since it is meant to be constantly opened it can be ripped open. A box with a metal or wood lock, if you lose the key, cannot be cracked open.