NFPA 25 5.3.1 specifies that normal sprinklers have to be tested or replaced at 50 years and sprinklers with fast-response elements at 20 years.
1) Are these "fast-response" sprinklers referenced in 188.8.131.52.1.3 those that industry refers to as "quick response" or are these "ESFR Early Suppression Fast Response" sprinklers? If not, when are "quick" sprinklers to be tested?
2) Is there an easy way to tell the difference between "normal" & "quick" sprinklers besides trying to measure the bulb?
3) When did installation of "quick response" sprinklers become the norm in the US?
For context, we took over management of a 5-story office building that was completely renovated in 1982, including the sprinkler system, The certified third-party fire sprinkler inspection company is telling us that we are past due for the 20-year testing of the sprinkler heads. By our calculations, the testing may not be required for another 13 years?