We’ll submit your foam sample to the testing lab for foam concentrate testing and foam solution testing. Results will usually be available within 7 business days, though 24 hour turnaround is available at extra charge. You will receive a comprehensive report showing sample information and test results, along with tank tags to reflect the test.
Firefighting professionals agree that annual testing of your foam inventory is crucial to maintaining the highest possible level of emergency preparedness. NFPA 11 Section 7.2 states:
“At least annually an inspection shall be made of foam concentrates and their tanks or storage containers for evidence of excessive sludging or deterioration. Samples of concentrates shall be sent to the manufacturer or qualified laboratory for quality condition testing.”
Foam testing offered by the Edward Wolff Company meets the protocols of ISO 17025 “General Requirements for the Competence or Testing and Calibration Laboratories,” as well as NFPA 11, 18 and 25 Standards.
When we send a foam sample to the foam manufacturer or independent laboratory, the sample is typically tested for following properties:
Refractive Index or Conductivity – This gives an indication as to whether the foam is full strength or if it has been diluted with water. This value also gives an indication as to whether the foam is a 1 percent, 3 percent or 6 percent concentrate and whether it is freeze protected or not.
Freeze Point – This value is measured to verify that the concentrate is freeze protected and to determine what its exact freezing point is.
Viscosity – This value is compared to the viscosity specifications of the product when it was new. Proper visconsity ensures the producet will properly mix going through the proportioning system.
PH – This value is compared to the pH specificaction of the foam concentrate. A pH value out of specification can indicate the foam is contaiminated and could cause an ingredient to drop out of solution, particuluary the poymer used in alcohol resistant foam.
Specific Gravity or Density – The density of the foam concentrate can also indicate if the foam is full strength or has possibly been diluted.
Someone from your company should meet our representative at the job site. This person’s role will be to assist us as the tank installation is inspected, the tank is filled with concentrate, and your personnel are prepared for the test.
Water tests are performed first to establish the system’s proportioner demand. Then, the foam proportioning is tested and percent verified. After testing is completed, we will prepare service and test reports for you to distribute to the proper authorities. Once the tank is filled, our representative will review the procedures with interested personnel. The test may occur about one hour after the tank is filled. All individuals who wish to witness the fill and/or test should be present at that time.
Testing will include the use of the fire pump, if any. Proper communication between the pump house, riser room and test area is essential for an effective test. In addition, you will need to provide sufficient personnel to open and close the valves.