DOOR/YEE

A Y pipe fitting is similar to a standard tee, but the branch line is angled. It is also called a y
type pipe fitting. It uses angling to limit friction. The DN refers to the nominal pipe size, which
lets you choose the correct component for the pressure and temperature rating. It is a crucial
metric for selecting the weld y tee. Along with this, you also need the wall thickness that gets
specified in the schedule.
A y tee can improve the flow of the piping. Another difference from a standard tee is that wyes
usually branch out at 45 degrees and not 90.