WebApr 28, 2000 · Refrigerant line velocities Economics, pressure drop, noise, and oil entrapment establish feasible design velocities in refrigerant lines. These are: Suction line - 700 to 4,000 fpm Discharge line - 500 to 3,500 fpm Condenser drain line - 100 fpm or less Liquid line - 125 to 450 fpm WebAug 29, 2001 · Equipment manufacturers design their stub connections for the average or most common pipe size used. The actual pipe size needed may be larger or smaller. …
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