Stress Analysis of a Cast Iron 125-lb. Valve Assembly

TL;DRAbstract

During the war emergency, in view of the possibility that more strategic materials than cast iron might be conserved and procurement problems eased, some of the various standards associations, as well as consumers and suppliers, were advocating the use of cast-iron valves and fittings in place of steel. Unfortunately, there were few engineering data available and what were available-were too contradictory in nature, due to differences in test results caused by varying composition and cooling rates, to assure design and operating engineers that it was safe to rely on cast iron. Engineers had been trained for years not to use cast-iron valves, or fittings, in lines where a break might be costly in material or life or both. The A.S.M.E. code limitations on the use of cast-iron valves and fittings also hindered a wider use of the material. In order to determine accurately the feasibility of uprating various cast-iron valves, we started an experimental stress analysis program to determine t

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