The grades of the main pipe and branch pipes
Thread Content
Generally, the main pipe is connected to the drainage branch pipe; does the grade of the branch pipe need to be the same as that of the main pipe? I remember there were regulations stating that the vent pipe should be of the same grade as the main pipe, but I can’t find the source now. Does anyone know where it is?
I have something here that went from 300kg to 25kg, and I’m worried about getting the necessary level-up points.
Your level has increased way too much; it’s not reliable
It is generally not necessary for them to be the same; depending on the actual operating pressure, the grade of the vent pipe will be 1-2 grades lower than that of the main pipe.
In the industry, high and low pressure reducers with flange connections were previously used, which facilitated replacement. But now that the scale has increased, we don’t have the right fittings available.