In order to determine the extent of corrosion damage that has occurred on the internal pipe walls in fire sprinkler systems, CCI offers the Fire Sprinkler Corrosion Assessment Program. This process is used to determine the root cause of the corrosion, the locations within the piping where damage has occurred and the severity of the damage.
In many cases, it is not necessary that the entire fire sprinkler systems be replaced. Remediation of the system with limited pipe replacement and the implementation of a comprehensive corrosion control strategy can save many systems.
The activities that will support the assessment include the following:
- Review of system “as built” drawings, if available
- Identification of “hot spots” within the system where failures have occurred in the past
- Identification of most likely locations for accelerated rates of corrosion (trapped air, higher temperatures, likely locations for solids build-up)
- Defining the corrosion mechanisms and “root causes” for the metal loss, pit formation and leak development
- Outline possible corrosion control strategy that addresses the key corrosion mechanisms (materials selection and treatment options)
- Development of pipe replacement plan based on findings
- Recommendation of complete corrosion control strategy going forward for the system with associated system modifications, corrosion device needs and expected program costs
Assessment Program Investigative Tools (ranked by importance)
- Video scoping of the internal piping – visual evidence of solids and metal loss is the most important physical evidence.
- Sectioning, cleaning and analyzing pipe samples from the system – Metal loss should be characterized by pit shape, pit depth, pit frequency, pit size, texture of the metal loss, and appearance of the surfaces under deposits and composition of the corrosion by‐products.
- Determination of the type and degree of microbial contamination in the system
- Determination of the elemental composition of debris collected from inside the system