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ANSI/DIN/GOST/BS Carbon Steel / Stainless Steel A105/Q235/20#/304L/316L Wn/So/Bl/Sw Forged Flange China Manufacture, Find Details and Price about Flange Collar Flange from ANSI/DIN/GOST/BS Carbon Steel / Stainless Steel A105/Q235/20#/304L/316L Wn/So/Bl/Sw Forged Flange China Manufacture - Hebei Rich Pipe Fitting Mill Co., Ltd.