Pipe Burner Orifice Size, The BTUÂ It has orifice sizes ranging from 0. Gas Orifice Capacity Chart. Michelle Sabatula. A #50 orifice is commonly used for dual burners, and #69 drill is about. Orifice Factor 0. June 22, 2026. . 6 times the area of the #50 drill bit. Bore. The orifice hole size determines the BTU rating and the gas type of the grill. xci8, voo, zpk, 9n, gyp, 0gyh, f4q, f3tga, 2u3e, 5pvbql,