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ASME B16.47   2020   Large Diameter Steel Flanges NPS 26 Through NPS 60 30 $
ASME B16.47   2017   Large Diameter Steel Flanges NPS 26 Through NPS 60 30 $
ASME B16.47   2011   Large Diameter Steel Flanges NPS 26 Through NPS 60 Addenda A - 10/26/1998 30 $
ASME B16.47   2006   Large Diameter Steel Flanges NPS 26 Through NPS 60 Addenda A - 10/26/1998 20 $
ASME B16.47   1996   Large Diameter Steel Flanges NPS 26 Through NPS 60 Addenda A - 10/26/1998 10 $