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welding neck flanges rf or gf ASME BG BEST

welding neck flanges rf or gf ASME 1.Size:4'' 2.WT:150lbs 3.Material: A182 F304L 4.Standard:ANSI B16.5

JINAN ZHANGQIU EN1092-1/TYP11 S235JRG2/RST37.2/C22.8/P250gh PN6/PN10/PN25/PN40 DN15-DN1000 Welding Neck RF Flange

Certificate: TUV, CE, ISO9001, KR Size: DN15 - DN1500 Professional service 20 years experience