Crude oil, refined petroleum products, and liquefied natural gas are commonly transferred throughout petrochemical production, storage, and processing operations. These media can vary significantly in viscosity and may contain components that are corrosive to pumping equipment. Diaphragm pumps can be constructed from corrosion-resistant materials such as PP, PVDF, and stainless steel to withstand these demanding conditions.

The fluid remains completely separated from the driving mechanism throughout the transfer process and helps reduce the risk of leakage to the surrounding environment. This makes diaphragm pumps well suited for handling crude oil, petroleum products, liquefied natural gas, and other petrochemical media where safe containment is a key requirement.