How many openings does a closed head drum typically have?

A closed head drum typically has two openings. These drums are designed with a sealed lid that provides a secure closure, which is essential for containing hazardous materials. The two openings usually consist of a larger bung for filling or emptying the drum and a smaller bung for venting or sampling. This design is advantageous because it minimizes the risk of leaks and spills while still allowing the necessary access for handling the contents safely. The configuration of openings also plays a role in ensuring the integrity of the container and maintaining pressure stability, which is critical in hazardous materials management.