No. I have 12 inch field line. Here is a picture of it. I paid a septic company to install it for me because my ground has no much clay in it, the soil doesn’t want to drain properly.
Around here, that's a drain pipe for under a culvert.

12" weeping drain, set in pea gravel, covered with a soil barrier then buried, set upon clay soils in a singular box run design. That must be nightmarish to install. I can't imagine it performs well, either.
I'm in FL, regulations have (finally) tightened up some - but for much of the State, like much of southern MS, the water table is so high that old septic has become a huge problem for water quality.