составь пересказ текста на 20 предложений и пронумеруй их Modern long-distance pipelines are operated mainly 1) automatically by a computer at the headquarters of the pipeline company. The computer monitors the pressure, flow rates, and other 2) parameters at various locations along the pipe. It also performs many on-line computations and sends commands to the field to control the operation of the valves and pumps. Manual intervention is frequently needed to modify the 3) operational operation, as when different batches of fuels are directed to different temporary 4) storage tanks, or when the system must be shut down or restarted.

Pipeline components. A pipeline is a system that consists of pipes, fittings, pumps for 5) oil pipelines or compressors for 6) gas pipelines, booster stations, storage facilities connected to the pipe, intake and outlet structures, flowmeters and automatic control equipment (computers). Booster stations are needed only for long pipelines that 7) require more than one pumping station. The distance between booster stations for large pipelines is on the order of 50 miles.

Pipeline Network Composition. A pipeline network 8) consists of various parts that work together 9) to move oil, gas or products through them from location to location. The starting point is a 10) pipeline delivery network has comprehensive 11) monitoring system, which has the initial injection station. This is where the product is fed into the pipeline system, which is the initial 11) station. This is where the product is fed into the pipeline system, which has the initial injection station. This is attached to the storage tanks of the plant. The flow of products throughout the pipeline is regulated so that safe product supplies are ensured. A smooth product flow is 12) maintained by compressors or pumping stations. These facilities are stationed at regular 13) intervals along the network based on terrain topography, nature of the products transported and other 14) prevention requirements. Partial delivery stations, known also as intermediate stations, allow the pipeline operator to deliver part of the product being transported. Block valve stations are 15) located to protect and maintain the pipelines - with these valves, the operator can isolate any segment of the pipeline for maintenance work (e.g., to isolate a rupture or leak). Pipeline block valve stations are usually 16) located every 30 to 50 km. - the location depends on the nature of the product being transported, the trajectory of the pipeline and the operational conditions. Final delivery station, known also as outlet station, or terminal, this is where the product will be distributed to the 17) consumer - it could be a tank terminal for liquid pipelines or a connection to a distribution network for gas pipelines.

Various technologies and strategies are implemented for operating and 18) maintaining pipelines, from physically walking the lines to satellite surveillance. Through the use of 19) advanced techniques pipeline operators watch the rate, pressure and movement of products. Pipeline maintenance crews work to ensure the 20) integrity of pipeline infrastructure. They make sure that welding operations, pipeline repairs, corrosion 21) prevention system checks and electronic equipment maintenance are performed safely and according to pre-established procedures