The one on the container is called the container flange, the one on the equipment is called equipment flange, the one on the pipe is called pipe flange, and the one on the valve pipeline attachment is called accessory flange. This is a common term in every industry. There are no two names in the standard book.
Equipment flange refers to the flange connected to the equipment cylinder or equipment head on the equipment shell. Equipment flanges can be made of HG20592~HG20634 steel pipe flanges or container flanges.
Specially used on equipment include: take-over flange, manhole flange, hand hole flange, loading and unloading hole flange, sight glass flange, splayed blind flange, etc.
In addition, the general definition of flange is: Flange is a part that connects pipes to each other and is connected to the pipe end.