Bulk bags, also called flexible intermediate bulk containers (FIBCs), can move and store from 250 to 2,000 kg of bulk materials. This article discusses some serious issues that arise when handling FIBCs containing volatile products in hazardous atmospheres.
When an FIBC is filled or discharged, there is a steady accumulation of charge within the product that is transferred to the walls of the bag. If left unchecked, this static buildup may result in low-energy discharges, known as "corona" discharges, from the surface of the FIBC. It can also lead to the charging by induction of adjacent isolated conductors, such as people or ungrounded metal.