For food trucks, the right ASME tank size depends on the number and BTU rating of your burners and how often you can arrange for refilling. The Flame King 20.3-gallon and 29.3-gallon horizontal ASME tanks are popular choices for food truck applications because they offer substantial fuel capacity without taking up excessive space under the vehicle. The 20.3-gallon tank comes with mounting brackets included. All food truck propane installations must be completed by a licensed propane contractor to meet local code and commercial kitchen safety requirements.