Why Alloy C-276 (Hastelloy C®) is the best choice for chemical injection
Chemical solutions play an important role in municipal water & wastewater treatment. Water treatment professionals use chlorine and ammonia for disinfection, sulfuric acid to control ph, and potassium permanganate for taste & odor control. These are just a few examples of the critical role chemical solutions play in water and wastewater treatment.
Water & wastewater treatment professionals use chemical injection quills to feed chemical solutions into pipelines and water mains. Injection quills are retractable or non-retractable. Retractable injection quills have a corporation stop or ball valve. This allows the injection quill to move in and out of the pipeline. Operators prefer this type of unit because it alleviates the need to shut down the pipeline in order to maintain or replace the injection quill.
Non-retractable injection quills do not have a corp. stop or ball valve. They install directly into the pipeline via a direct tap, half coupling or service saddle. Operators must depressurize and drain the pipeline before replacing or performing maintenance on the injection quill.
Chemical solutions used in municipal water treatment can be corrosive to water mains and pipelines. For that reason, it is important operators make sure the injection point is close to the center of the pipeline as possible, away from the sidewall.
Limitations of PVC & CPVC
PVC and CPVC have long been the material of choice for municipal chemical injection. This material is inexpensive, readily available and offers excellent corrosion resistance.
The City of Huntington Beach, California was using a retractable PVC injection quill to feed fluoride into one of their water mains. The injection quill broke off just inside the water main, close to the sidewall. Corrosion from the concentrated fluoride solution eventually caused a leak in the pipeline. The PVC injection quill broke inside the pipeline because of the forces created by turbulence and water velocity within the pipeline exceeded the limits of the PVC material.
To make matters worse, the shortened PVC injection quill now posed a safety hazard to any person attempting to withdraw it from the pressurized pipeline.
Benefits of Alloy C-276
Alloy C-276 is a highly corrosion resistant nickel alloy. Its superior corrosion resistance to chlorides and acids make it an excellent choice as a material for chemical injection.
The City of Huntington Beach repaired the pipeline and installed a new Alloy C-276 injection quill
Gary Eddington, with the City of Huntington Beach, had this to say about their new Alloy C-276 injection quill. “The Alloy C-276 injection quill solved our problem. We no longer have to worry about our injection quills breaking and corroding our pipeline. I can move on knowing that I won’t have to deal with them in the future. They cost more, but there are well worth it”. He also mentioned the safety benefit from Alloy C-276. “Our technicians don’t have to worry about them breaking. They are much safer to operate than the PVC injection quills we were using before.”
The City of Huntington Beach is not alone with their success with Alloy C-276. Water & wastewater treatment professionals have been installing Alloy C-276 injection quills from SAF-T-FLO Chemical Injection since 1994. Since then, not one Alloy C-276 injection quill has failed due to corrosion or has broken while in service.
Alloy C-276 is the best choice for safe and reliable chemical injection.