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Except for the ends, the difference in elevation between the highest and lowest point. along the top of the silt fence shall not exceed one-third the fence height. Posts should be spaced a maximum of 6 feet (1.9 m) apart and driven securely into the. ground a minimum of 30 inches (0.8 m).
Determine the minimum insulation thickness required for a pipe carrying steam at 180 0 C. The pipe size is 8 and the maximum allowable temperature of outer wall of insulation is 50 0 C. Thermal conductivity of the insulation material for the temperature range of the pipe can be taken as 0.04 W/mÂ·K.he purpose of this sample problem is to demonstrate radial heat conduction calculations and practical calculations of insulation thickness also require consideration of convective heat transfer on the outside of insulation wall.