... ANSI B16.5 1/2"--24" 150-2500LBS BL,SO,SW,LJ,WN,THDA105, A350LF2, A182 F11A182 F304 ... 4 BS3293-1960 STANDARD 26"--48" 150-600LBS SO,WN A105, A350LF2,A182 F304/F304L,F316/F316L ... 6 ASMEB16.36 STANDARD 1"--24" 300--2500LBS SO,WN,THD A105, A350LF2,A182 F304/F304L,F316/ ... gratings and accessories, grey and ductile iron manhole covers, malleable iron pipe fittings and so on.We have perfective quality system ...