I have Four Piping equipment designations, I would like some explanation about.
1 - "WN Flange 6" ASTM A 105 AC class 150 FS"
2 - "PL Plate Flange 10 ASTM A 105 class 150 FP"
3- "WN flange 3" AC ASTM A 105 class 300 RTJ"
4- "REDUCER Concentric 16" x 14" AC SCH 40 BW FXF"
What do "WN, PL, FS, FP, RTJ, AC, BW, FXF" stand for ???
Thanks you in advance !




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