Enbridge Pipelines operates crude oil and petroleum products pipeline systems worldwide. It transports liquid hydrocarbons from the point of supply to refining markets in the Midwestern United States area and eastern Canada. The company specializes in providing batching and scheduling services. Enbridge Pipelines conducts various pipeline maintenance programs. It offers repair services for sleeves, vapour plugs, isolation tools and inertial geometry pigs. The company has a leak detection system that considers pressure variations and performs mass balance calculations. In addition, Enbridge Pipelines provides shipping and delivery services. It is a part of Enbridge, which also operate Enbridge Gas Distribution, Enbridge Technology, Enbridge Income Fund and Enbridge Energy Services companies.