Includes the manufacturing of cast iron heaters or radiators.

Code 3081 applies to employers engaged in operating foundries, manufacturing cast iron or malleable iron for outside customers.  This classification includes wood or metal pattern making, core and mold making, the melting of pig iron and certain percentages of cast iron scrap in furnaces and the pouring of the molten metal into molds to produce either gray or white iron.  This melted metal is cast to produce malleable iron.  Cooled gray, white or malleable castings generally receive some machining to remove burrs or imperfections.  The finished castings are then inspected, packed and shipped.  This classification is also applied to soil pipe foundries using the pit method wherein stationary molds or flasks are used to cast the pipe.

This classification also applies to employers engaged in manufacturing plumbers’ enameled ironware such as bathtubs, washbasins and commodes.  This work contemplates extensive foundry operations, i.e., wood or metal pattern making, core and mold making, the melting of pig or scrap iron in furnaces and the pouring of the molten metal into molds.  The cooled castings are then cleaned and ground smooth prior to being enameled or porcelainized by spraying and baking processes.  The finished products are inspected, crated and shipped.