What are the different opening designs of metal barrels?

1. Closed steel barrel
Small opening steel barrel: The diameter of the barrel top opening is not more than 70mm, usually equipped with a screw closure, such as a plug type or a screw cap type, suitable for occasions with high sealing requirements.
Medium opening steel barrel: The diameter of the barrel top opening is greater than 70mm, and a top pressure closure, such as a bolt type or a pressure cap type, can be selected, which is suitable for loading larger volumes of materials.
2. Open steel barrel
Fully open steel barrel: The barrel top can be fully opened to facilitate the loading and unloading of materials. Usually a closed hoop closure, such as a screw type or a lever type, is used to fix the barrel cover to the barrel body through a closed hoop.
Open necked steel barrel: The top of the barrel body has a necking design, and the opening diameter is equal to the necking diameter. This design helps to reduce the space inside the barrel and improve packaging efficiency.
3. Special design
Steel lifting barrel: In order to facilitate handling, a handle is provided on the barrel body. There are two forms of open and closed, and the capacity is usually small.
Special top barrel: The top of the barrel is designed to be special to meet specific packaging or usage requirements.
4. Other opening forms
Roll-sealed type: The barrel cover and barrel body are tightly connected through the crimping process, which is commonly used in food and beverage cans.
Easy-pull lid type: easy to open, often used in occasions such as beverage cans that need to be opened easily.