What is the flow standard for natural gas pipelines

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1. Gas consumption and calculated flow rate

Gas consumption refers to the total amount of gas consumed by users within a certain period of time. It varies according to the type and purpose of users, mainly including residential gas consumption, commercial gas consumption, heating and ventilation air conditioning gas consumption, etc. Residential gas consumption: mainly considering the daily cooking, hot water and other living needs of residents. The gas consumption index should be determined based on the statistical data of local residents daily gas consumption. When there is a lack of actual statistical data, relevant specifications or data in the appendix can be referred to in combination with local conditions. Commercial gas consumption: including gas consumption in hotels, restaurants, eateries, hospitals, canteens, and other places. The gas consumption indicators of these places also need to be determined based on actual statistical data analysis or reference to data in relevant specifications. The gas consumption of commercial users is usually large and the usage time is relatively concentrated, so peak gas consumption needs to be considered when calculating. Heating and ventilation air conditioning gas consumption: The heating gas consumption can be determined based on local building heat consumption indicators, or estimated by referring to data in relevant appendices. The air consumption for ventilation and air conditioning is determined by the larger of the winter heating load and summer cooling load, and can also refer to the data in the appendix. For residential areas with centralized hot water supply, the gas consumption can be calculated according to the heat consumption in the "Code for Design of

Building Water Supply and Drainage". Gas calculation flow rate refers to the maximum hourly gas consumption that needs to be considered in the design of gas pipelines, which is directly related to the selection of gas pipeline diameter and the determination of pressure level. Residential and commercial users: When the rated flow rate and number of gas devices are known, the hourly flow rate can be calculated using the formula Qh=∑ kNQn, where k is the coefficient of simultaneous operation of gas devices, N is the number of devices of the same type, and Qn is the rated flow rate of a single gas device. When there is a lack of data on gas equipment, estimates can be made based on annual gas consumption, monthly peak coefficient, daily peak coefficient, and hourly peak coefficient. The specific formula is Qhl=(1/n) Qa, where n is the maximum annual gas load utilization hours, which can be calculated using the formula n=(365 × 24)/KdKh. Qa is the annual gas consumption, and Km, Kd, and Kh are the monthly peak coefficient, daily peak coefficient, and hourly peak coefficient, respectively. Heating, ventilation, air conditioning, and domestic hot water users: When the rated flow rate and number of gas equipment are known, the gas calculation flow rate of centralized gas boiler rooms, direct fired turbines, or distributed energy supply units should be determined based on the rated flow rate of each gas equipment, taking into account the backup situation of the equipment, and superimposed. When there is a lack of information on gas equipment, the hourly gas flow rate for heating users can be estimated using the formula Qh2=(3.5 × qh × A)/(QR × η), where qh is the heating heat index, A is the heating building area, QR is the low

What is the flow standard for natural gas pipelines

1. Gas consumption and calculated flow rate

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