NuStar Logistics, L.P. engages in the terminalling, storage, and transportation of petroleum products; the transportation of anhydrous ammonia; and the refining and marketing of petroleum. The company operates in three segments: Storage, Transportation, and Asphalt and Fuels Marketing. The Storage segment operates terminal and storage facilities that provide storage and handling services for petroleum products, specialty chemicals, crude oil and other feedstocks, and other liquids; and storage tanks that are used to store and deliver crude oil. This segment also provides various services, such as blending, filtering, pilotage, tug assistance, line handling, launch, emergency response, and other ship services. The Transportation segment transports refined petroleum products, crude oil, and anhydrous ammonia. The Asphalt and Fuels Marketing segment refines crude oil to produce asphalt and certain other refined products; and purchases crude oil and other refined petroleum products for resale. NuStar Logistics serves producers of crude oil, integrated oil companies, chemical companies, oil traders and refiners, farm cooperatives, railroads, and road and bridge construction companies. The company is headquartered in San Antonio, Texas. NuStar Logistics, L.P. operates as a subsidiary of Sunoco LP.