Choosing the size of the sewer ventilation pipe should be considered based on the amount of air flow, air speed, and the slope of the pipes. The following steps can be followed to choose the right size of the sewer ventilation pipe:
Determining the amount of air flow: The amount of air flow should be calculated according to water consumption and the volume of wastewater produced in the building. This value is determined in kilograms per second or cubic meters per hour using standard tables.
Calculation of air speed: according to the amount of air flow, the air speed in the ventilation pipe should be calculated. The air speed should be such that it does not damage the ventilator circuit as well as the sewage system. Air speed is measured in meters per second or feet per second.
Choosing the size of the ventilation pipe: according to the amount of air flow and air speed, the appropriate size of the ventilation pipe is selected. The size of the ventilation pipe should be such that the air speed inside it is within an acceptable range. To choose the right size of ventilation pipe, you can use the tables in the standards and reference books.
Calculation of the slope of the ventilation pipe: The slope of the ventilation pipe should be such that the accumulation of sewage inside the pipe is avoided. The slope of the ventilation pipe should be calculated in such a way that the speed of the sewage flow is sufficient to reach the inside of the ventilation pipe and keep the inside of the ventilation pipe clean. The slope of the ventilation pipe is calculated as a percentage, and the tables in the standards and reference books can be used to calculate the slope.
In general, choosing the appropriate size of the sewer ventilation pipe should be done according to the amount of air flow, air speed, slope of the ventilation pipe, and related standards and regulations. In addition, quality and standard materials and appropriate valves should be used in the piping system to maintain the health and safety of the sewage system.
