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UL Listed pipe

Question asked by waelio on Mar 9, 2019
Latest reply on Mar 12, 2019 by chriscarlson

Hi,

Is it necessary for the Fire sprinkler black steel pipes to be UL listed although it is conforming with ASTM A53 standard as per NFPA 13 7.3.1.1.? If the answer is yes, in which code can I find such information?

 

Thanks,

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