Pipeline Studio Tgnet Software 20

pipelinestudio improves the efficiency and accuracy of offline planning and design simulation through advanced offline simulation techniques for both natural gas and liquid pipelines. Through techniques such as steady-state and transient hydraulic analysis, pipelinestudio delivers a consistently higher quality of business decision, enabling better financial performance. And once pipelinestudio has constructed an offline engineering model of your pipeline network, the same model can be embedded into custom applications to enhance specific business processes and your financial performance overall.

3 CSSAreduces the compressor processing gas volume and the gasvolume entering the gas pipe network system, reduces the compressoroutlet pressure and the medium-pressure pipeline pressure, reducesthe compressor operating energy consumption, and significantly reducesthe amount of gas emission.

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Mr. Ashok Singh (1980 Chemical, IIT Kanpur) had his entire career with EIL. Till superannuation as GM Process from EIL, Ashok gained hands-on experience in process design of topsides of process, water injection & well platforms, preparation of conceptual study reports, process design of LPG plants, oil, gas and multiproduct pipelines including compressor stations, pumping stations and product unloading. He is also an expert in flow assurance studies and is adept in ASPEN PLUS (HYSIS), OLGA & PVTsim and Pipeline Studio (TLNET & TGNET).

Pipeline Engineering Consultants Pvt. Ltd. (PLECO) is a unison of highly experienced persons with respective domain expertise in all fields like Project Management, Pipeline design, Process, Civil & Structural, E&I, Rotating & Static Equipment; and Cathodic Protection, we offer end-to-end solutions in design, engineering and project management consulting of cross-country pipeline systems, gathering systems, pump & compressor stations and CGD/ CNG stations.

Registration number is UDYAM-UP-28-0016519

Our PAN number is ABAFP0277F

Our GST number is 09ABAFP0277F 1ZC

In order to study the flow-induced vibration characteristics of the natural gas vent pipeline under the internal flow field, taking the gas transmission station pipeline as an example, the ANSYS Workbench software was used to establish models under two working conditions, uncoupling and fluid-solid coupling, for modal analysis, and analyze and compare the calculation results and propose a structural improvement plan. The results show that the maximum amplitude of the first three modes under the two working conditions is concentrated on the riser mouth, and the amplitude under the fluid-solid coupling condition is slightly larger than that of no coupling; the inner diameter of the pipe elbow is large and the pressure is small, and the outside diameter is small and the pressure is small. Large, this instability will increase the air pulsation of the flow field. In the improved scheme, adding a restriction on the top to increase the rigidity of the pipeline can significantly reduce the maximum amplitude of the gas pipeline; adding an orifice to eliminate air flow pulsation has a certain effect on reducing the maximum amplitude and natural frequency, and the combination of the two can make the pipeline more stable. The research results of this paper can provide improved ideas for vibration reduction at the natural gas venting operation site.

The venting system is an important facility for long-distance gas pipelines, which plays an important role in ensuring the safety of pipeline maintenance and emergency repairs and reducing the hazards of pipeline accidents [1]. During gas pipeline expansion, renovation, overhaul and emergency repair [2], in order to ensure operational safety, the natural gas in the pipe section needs to be completely evacuated through the venting system, and inert gas such as nitrogen is injected into the pipe section to replace the remaining natural gas [3]. When venting, it is usually necessary to use a riser and a torch to ignite natural gas. However, due to the large height of the riser, the stability is poor, and the natural gas in the unsteady flow state at the bend connecting the horizontal pipe and the riser is prone to vibration, which will affect the surrounding environment and construction. There is a greater threat to personnel. Therefore, it is of great significance to reduce the vibration of the vent pipeline and enhance its structural stability.

Zhang Ke [4] used critical flow numerical calculation and transient simulation calculation of TGNET Pipeline Studio software to study the venting operation process control and venting time measurement method, and compared with the actual venting operation process, it was concluded that the construction pipeline venting operation It is related to the inherent physical parameters such as pipe length, diameter and pressure. Li Yutian and others used FLARE-NET and PHAST software to determine the Mach number, noise intensity and natural gas diffusion radius corresponding to the maximum discharge flow of different venting methods. Cen Kang [5] used FLACS to analyze the dynamic process of the fire transfer tube of a typical ground deflagration ignition device, and discussed the influence of the volume fraction of combustible gas in the fire transfer tube, the filling rate of combustible gas and the length of the fire transfer tube on its ignition performance. Zhang Yong [6] and others analyzed the China-Myanmar natural gas pipeline to determine the initial pressure of its venting, select a feasible venting method, calculate the venting time, and evaluate its impact on the environment. Li Longdong [7] et al. compared the three methods of venting and pressure reduction of gas pipelines at home and abroad, and verified by the practice of centralized hot process disposal in the second and third lines of the West-East Gas Pipeline, and summarized a use of gas pipeline compressors. Stepped pressure reduction method in which multiple pipe sections are continuously pressure-reduced and then vented. Feng Sheng [8] and others analyzed the change law of air volume, vent temperature, pipeline pressure, pipeline temperature and other parameters during the venting process. The structural behavior of submarine natural gas transmission pipelines is simulated with the aid of a finite difference numerical model [9].

The natural gas venting ignition pipeline has nonlinear vibration. The current researches on nonlinear vibration include the nonlinear vibrations of a contact-mode atomic force microscopy(AFM) model subjected to multi excitations are controlled via a time-delayed positive position feedback (PPF) controller [10], M. Sayed et al. applied active control to the nonlinear dynamic beam system to eliminate its vibration [11], Ali Kandil first derived a nonlinear dynamic equation for controlling the lateral vibration of a controlled system under a constant stiffness coefficient [12], the work of N. A. Saeed et al. aims to study and control the nonlinear dynamic behavior of a nonlinear asymmetric shaft system [13, 14], Y. S. HAMED et al. studied the nonlinear dynamics control of a contact atomic force microscope system using a time-delay proportional-differential controller [15, 16].

It is an unsteady flow state in the pipeline, and the streamline bending degree of the fluid at the transition bend of the riser pipe and the horizontal pipe is relatively large. In this paper, the Realizable k- model is selected:

The schematic diagram of natural gas venting is shown in Fig. 1. The gas is ignited through the main pipe, hose, and metal horizontal pipe riser. During the operation, the riser height is large, the structural rigidity is low, and the unstable airflow in the pipe causes the pipeline to vibrate. Phenomenon. Due to the existence of open flames, the continuous vibration of the pipeline will cause danger to the surrounding environment and construction personnel. This article specially analyzes the vibration characteristics of the L-shaped pipe.

As shown in Fig. 3, the natural frequency is calculated for the model under uncoupling and fluid-solid coupling (gas-solid coupling) working conditions. The first 6-order amplitude (unit: mm) of the pipeline under uncoupling and fluid-structure coupling conditions are shown in Fig. 5 and Fig. 6; the first 12-order natural frequencies of the two working conditions are shown in Table 1.

From Fig. 5 and Fig. 6, in the two calculation methods, the vibration pattern under the same vibration order is roughly the same, and the amplitude distribution position is basically the same: the first three orders of amplitude are concentrated at the pipe outlet, and the law is from top to bottom The amplitude is reduced, and the amplitude under fluid-solid coupling conditions is slightly larger than that without coupling, with a maximum value of 4.053 mm; the middle of the third-order pipeline even near the elbow position also has a larger amplitude.

It can be seen from Table 1 and Fig. 7 that natural gas has an impact on the natural frequency of the pipeline. The difference between the natural frequency of the pipeline under the conditions of non-fluid-structure coupling and fluid-structure coupling is up to 9.6 %, and the natural frequency of the pipeline under fluid-structure coupling conditions is slightly higher than that of no coupling. Natural frequency under working conditions.

Air pulsation usually occurs at cross-sectional changes. For example, the curve in this article will generate pulsating force due to air pulsation, as shown in Section 2.2 of this article. However, air pulsation always exists, and pipeline vibration cannot be completely eliminated. Only scientific methods can be used to reduce air pulsation and make it smaller than the engineering allowable value.

Installing an orifice plate of appropriate size at the inlet or outlet of the large container in the pipeline can form a non-reflective end, which converts the standing wave existing in the pipeline into a traveling wave, thereby reducing pressure pulsation. The hole size can be determined by the following formula (As shown in Fig. 10): be457b7860