When selecting the right propane tank, understanding the various sizes and uses is key. For those using a welding torch, a 20lb propane tank is often the go-to choice due to its portability and sufficient fuel capacity. This size is also widely used as a propane tank for grilling, making it a versatile option for outdoor cooking enthusiasts. For extended use, a 30lb propane tank offers more fuel, ideal for those needing extra power without the frequent need for refilling. It's a great middle-ground option in a propane tank comparison. On the other hand, a 40lb propane tank provides even more capacity, which is particularly useful as a propane tank for RV or other larger equipment that requires longer-lasting fuel. When it comes to camping, choosing the best propane tank for camping is essential for convenience and efficiency. Many campers prefer the 20lb or 30lb tanks, as they offer a good balance between portability and fuel capacity.