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DN 300 SCH10S ASTM A928M-UNS S31803 CLASS 1 BEVELENDS ASME B36.19MPIPE FLANGE Product Name WELDING NECK FLANGE Standard ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, 7S...