Is there any difference between Steel Pipes A53 Gr B Type F and Type S when using for Sprinkler systems? and what is the preference of one over another?
Please take a look at this link ASTM A53 steel - Wikipedia
All of them are suitable for sprinkler systems as long as the schedule meets the requirements of NFPA 13.
If you are not going to bend the pipes, Grade B is enough.
Do not waste money buying Type S (Seamless) pipes
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