A study on insulated risers

The plate-shaped casting method was used to determine the thermal physical parameters of three insulating materials: pearlite; formed plaster; and ceramic wool together with a wet sand mode. From the freezing characteristics of sand castings, a calculation method was formulated to describe the insulated riser. Using the measured physical thermal coefficients, this method was verified on a pure aluminum cubic casting. Experimental and calculated results were consistent. Pearlite and formed plastic risers were seven times smaller than the conventional ones. A ceramic wool riser was found to be eight times smaller. A theoretical analysis of the effectiveness of the insulated risers was also conducted.