Pipe fittings as followed:
Seamless pipe fittings(tee): 1/2" nb to 24" nb
Welded pipe fittings(tee): 26" to 72"
Std, xs, xxs, sch10, sch20, sch30, sch40, sch60, sch80, sch160, etc.
Stainless steel: A403 wp304, A403 wp304l, A403 wp316, A403 wp316l, A403 wp321 and so on.
Carbon steel: A234 wpb, a105, q235, st37.2, st35.8 and so on.
Alloy steel: Wp11, wp22, wp12, wp5, wp9 and so on.