... prime and the impellers rotate in vapor.Pump Applications and ClassificationRefineries and chemical plants use pumps to move liquids. Pumps are used in a variety of applications and processes, ... come in four main types: screw (single and multiple), gear (internal and external), vane (sliding and flexible), and lobe.Materials: Carbon Steel, Alloys, and Nonferrous Alloys67Low-Carbon SteelFortunately, ... pronounced between 950° and 1,000°F (510°C and 537.77°C). For example, at 950° and 1,000°F (510°C and 537.77°C), the strength of low-carbon steel is about one-third and one-sixth, respectively,...