Abstarct: Today, the use of natural gas as the cleanest fossil fuel for energy supply in the industrial and domestic sectors has grown significantly. The transfer of natural gas from the production site to consumers is often done through pipelines. Along the way, natural gas undergoes various thermodynamic processes, such as: increasing pressure, decreasing pressure, heating, and so on. Natural gas reaches the city gate through the main lines that form the transmission network. It is then transferred to consumers using the distribution network, which includes domestic, industrial and special consumers. The transfer of natural gas from the production site to these consumers requires compressor stations, in which compressors with gas turbine actuators are used to compress the natural gas and compensate for the pressure drop along the route. Investing in pipelines and compressor stations is costly, so a technical and economic review of these systems is essential. The purpose of this study is to provide a technical and economic perspective on pipelines, especially compressor stations. In this research, after mathematical modeling of natural gas transmission pipeline, the implicit finite difference method has been used to solve the equations of continuity, momentum, energy and state equation for single-phase flow within pipelines. The solution method used in this study did not neglect the inertia term in the momentum survival equation and also considered non-isothermal conditions in the gas flow. The results of this section show that by decreasing the time step and increasing the flow velocity, the role of displacement terms in the momentum equation increases, especially during sudden changes, so that with a 100% increase in velocity, the maximum amplitude of the results increases by 66% In another part of this study, first, a model for predicting gas consumption in the domestic sector baxsed on environmental conditions for a hypothetical area is presented. Then, using this model and numerical method for solving gas flow equations, a model for estimating the amount of pressure drop in a hypothetical pipeline baxsed on the environmental conditions of the consumer area is presented, which can be used to control the amount of pressure at the inlet of urban stations. This study deals with the dimensionless of gas transfer equations in isothermal mode to investigate various states of compression or discharge of natural gas in (of) natural gas transmission pipelines. In such a way that the operator can predict the time required to perform this operation for a certain volume of gas by considering the leading constraints such as allowable pressure and etc. In this study, in order to simulate a natural gas transmission pipeline, several different and general modes have been considered, so that different arrangements of compressors in compressor stations and different line conditions have been considered. The performance of the compressors has been simulated using polynomials obtained from their performance map and integrated with the flow equations to evaluate the performance of the entire pipeline. Finally, an economic analysis of the impact of various parameters on the investment and operating costs of a gas transmission project has been performed. According to the results, as the flow rate increases, the net present value flow also increases, so that a 30% increase in the flow rate causes an 80% increase in the current net value. Also, using the results, the optimal flow rate for each pipeline diameter and the optimal diameter for a specific flow rate can be determined.