Presents general information on materials commonly used for receiving, storing, and handling commercial grades of aqueous hydrofluoric acid and anhydrous hydrogen fluoride. Some materials generally avoided are also discussed. This report is intended for end users, designers, and suppliers of HF equipment. These include, among others, workers in process industry plants; engineering and construction designers; and suppliers of equipment such as pumps, valves, and hoses. This information is useful for initial design and for cost estimates of equipment to handle most commercial hydrofluoric acids. The report addresses particular acids purchased to normal commercial quality that do not contain impurities likely to affect their inherent corrosion characteristics.