Apr 25, 2020
Return bend components definitions according to #NFPA_13 - 2019 edition: 1- #Arm_over: A horizontal pipe that extends from the branch line to a single sprinkler or a sprinkler above and below a ceiling. 2- #Riser_nipple: A vertical pipe between the cross main and branch line. 3- #Branch_line: The pipes supplying sprinklers, either directly or through sprigs, drops, return bends, or arm-overs. 4- #Hanger: A device or assembly used to support the gravity load of the system piping. 5- #Pendant_sprinkler: A sprinkler designed to be installed in such a way that the water stream is directed downward against the deflector. (at AB Fire Equipment & Services) https://www.instagram.com/p/B_ZojUDADvr/?igshid=1t98g6eoip3nt