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S31803 / 2205 / F51 Stainless Steel Pipe Flange ASTM A815 Pressure Class 150 - 3000lbs Stainless Steel BL Flanges Meterial Grade: 201, 202, 301, 304, 304L, 310S, 316, 316L,316Ti, 317, 317L, 321, 347...