Chemical injection Quill
The angle at which a quill or corporation stop is inserted into a pipe to inject chemical is important for effective, efficient chemical feed. The orientation of the quill is also important (i.e., whether the 45° angled end faces upstream or downstream).
Corporation Stops
Corporation stops are used for feeding chemicals into a liquid phase. When used for feeding acid into a horizontal pipe, the corporation stop should be installed in the 4 o'clock or 8 o'clock position midstream.
When installing an injection quill into a horizontal liquid stream, it should be installed in the 6 o'clock position and a minimum of 3 feet or 8 pipe diameters upstream of any elbow or bend. The 45° angled end should face downstream. The end of the injection quill should be at midstream or at least 2 inches from the bottom of the pipe for larger pipes.
When installing an injection quill into a horizontal vapor stream, it should be installed in the 12 o'clock, 3 o'clock, or 9 o'clock position and a minimum of 3 feet or 8 pipe diameters upstream of any elbow or bend. The 45° angled end should face upstream
When dealing with vertical piping, the angle of installation does not matter (e.g., 12 o'clock, 4 o'clock). The orientation of the injection quill does still matter (e.g., 45° angled end facing upstream or downstream).
