Chemical Injection Quill
A line of quills for injecting chemicals into liquids and gases (for example, into feedwater pipes in steam plants).
Characteristics
Pressure range:  subatmospheric to 5000 psig (34.5 MPa)  
Temperature range:  Up to 1200 F (650 C)
Attachments:  Welded or threaded boss or bolted flange
Description
In the past, chemical injection quills have not been much more than a piece of tubing extending into a pipe.  This design is prone to erosion-corrosion and cavitation in the piping after the quill due to vortex shedding and other problems.  In addition, these quills and the piping just downstream are often not properly inspected.  As a result, there have been numerous cases of damage to the piping just after these quills.
The Jonas, Inc. Chemical Injection Quill has a tapered shape which is designed to reduce the effects of vortex shedding, thereby reducing the likelihood of erosion-corrosion, cavitation, and quill fatigue cracking.
Each quill is custom designed for each application with considerations of vortex shedding, resonance, vibration, erosion, and strength of the attachment to the pipe, according to ASME rules.  The quill can be supplied with one or two root valves.  The quill design is shown in Figures 1 & 2.
Sketch of a Chemical Injection Quill
 Figure 1. Sketch of a chemical injection quill

Chemical Injection Quill
Figure 2.  Flanged Chemical Injection Quill
Materials
Stainless Steel (304 or 316)
Other materials available upon request