My relocation was the NFPA 24 technical committee discussed the
temperature/pressure limitations and the fact the material was not Listed.
They were okay with limited use (thus the 2' allowance) of the product.
The caution notes were added to the Annex to point out some of the concerns.
I do
Thanks for the additional comments John, oh and BTW, I guess the forum doesn't
do different text colors.
My point was that if you are unsure whether or not an item is being used
correctly, go to the sources, either the manufacturer's installation
guidelines, the letter from the recognized
Looking at Craig's comments directly, I want to provide some information. *(in
blue bold)*
1. Go to the manufacturer's data and see if it is listed to be installed
above grade per UL and/or FM as a fire riser. * I am not aware of many
nonmetallic underground materials which are Listed for a fire
I know the answer has been given correctly. However, an assumption was
made - steel piping. Other materials may be smaller: (NFPA 13-2019
edition)
27.2.1.2 Pipe sizes shall be no less than 1 in. (25 mm) nominal
for black or galvanized steel piping and 3∕4 in. (20 mm) nominal
for copper
