Once the tank was filled, I drilled another hole where I wanted to tap into the tank to let some water out. Then using a

[zihadhosenjm40]

Step 3: Cut the propane tank
**** Warning, cutting a propane tank is not acceptable. I took precautions before attempting this task, so I take no responsibility if you damage yourself or your property by attempting to cut into a propane tank. Do so at your own risk. ***** Do
any internet search on how to cut a propane tank and you will get all sorts of recommendations on how to do it, but I have no idea which is the right way. Some say to fill it with detergent and water to force car owner data the propane vapor, or to purge the tank with nitrogen.
I have found the best way to cut the tank is to fill it with water and then cut it. The water ensures that any residual propane vapor that may be in the tank is forced out. One option was to remove the valve and then fill it with water, but removing the valve is easier said than done since it is really pulled into the tank and I didn't want an explosion trying to remove the valve.
I ended up opening the valve all the way while slowly filling the tank with water because the tank will be sealed with air, it will take a while. I would rather take the extra time to fill it with water than blow myself up. Once I filled the tank to 1/4 full, I turned the tank upside down and drilled a small hole in the top of the tank, then turned the tank back upside down. The hole allows the air to escape while the water fills into the valve for the remaining 3/4 of the tank. I then attached a hose to the valve to quickly pour water into the tank.
Also a 100 lb tank is a lot of volume to fill with water. Instead of using tap water or drinking water, I collected water from my gutter to fill the tank. No point in wasting clean water.

Step 4: Creating the doors
I wanted the top to be removable so it was cut off in the previous step. Now I needed to add two doors to the tank, the top door would be for the cooking area and would be larger than the bottom door. The bottom door is for access to the firebox.
I outlined the two doors on the tank, I simply marked the rough size and then cut them out using a measuring tape.
First I cut out the side of the door where the hinges would be using an angle grinder with a thin cut disc. I then welded to the hinges, this makes it easier to line up the doors, I also used regular door hinges as they are inexpensive and work well. Once the hinges were welded the door was then cut out using an angle grinder, if all goes well the doors will line up perfectly with the body of the propane tank.
The doors then had a 1/8” x 1” steel blank welded to the outline of the door, this serves two purposes, it makes the door rigid and covers the gap of the grinding disc from the cut out. Depending on how the doors fit to the tank body, a felt spacer may be needed, I didn’t bother putting one in.