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Manganese % 0.95 1.2 0.95 1.2 1.2 <br /> Phosphorous, max. % 0.05 . 0.05 0.05 0.05 0.05 <br /> Sulfur, max. % 0.045 0.045 0.045 0.045 0.045 <br /> Copper, max.% 0.40 0.40 0.40 0.40 0.4 <br /> Nickel, max. % 0.40 0.40 0.40 0.40 0.4 <br /> Chromium, max. % 0.40 0.40 0.40 0.40 0.4 <br /> Molybdenum, max. %0 0.15 0.15 0.15 0.15 0.15 <br /> Vanadium, max. % 0.08 0.08 0.08 0.08 0.08 <br /> Hot-Dipped Galvanizing <br /> Sets standards for coating of pipe with zinc inside and outside by the hot-dipped process. Weight of coating must not average less <br /> than 1.8 oz. per square foot and not less than 1.6 oz. per square foot. <br /> Permissible Variations in Wall Thickness <br /> The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified. <br /> Permissible Variations in Weights per Foot <br /> Plus or minus 10% <br />