What is the main purpose of the bung in a tight or closed head drum?

The main purpose of the bung in a tight or closed head drum is to vent pressure and allow for product transfer. Tight or closed head drums are designed to store liquids under pressure or to prevent contamination, and the bung serves as a critical component in managing these functions.

When a liquid is stored in such a drum, pressure can build up due to temperature fluctuations or chemical reactions. The bung provides a means to safely release this pressure, thereby preventing potential hazards such as drum rupture or explosive release of contents. In addition, the bung allows for the transfer of liquids in a controlled manner, enabling the safe addition or removal of product without spilling.

The sealing capability of the bung is also important, but its primary role in this context goes beyond just sealing; it actively facilitates safety and operational efficiency when handling hazardous materials. Thus, venting pressure and product transfer are central to its function in maintaining the integrity of the drum and ensuring safe handling practices.