Trunk oil pipeline is a pipeline designed to transport marketable oil from the areas of their extraction (from oil fields) or storage to places of consumption (oil depots, transshipment bases, tanker loading points, oil terminals, individual industrial enterprises and oil refineries). They are characterized by high throughput, pipeline diameter of 219 to 1400 mm and pressure of 1.2 to 10 MPa.

The leader among pipeline transport operators is the Russian company Transneft PJSC: its enterprises have the world's largest oil pipeline system - more than 50,000 kilometers. This company has stringent requirements for equipment suppliers for its facilities. PTPA manufatures Slide Gate Valves, Shutoff Control Ball Valves, Check Valves in full compliance with the Transneft PJSC requirements.