The convection duct is usually of semi-circular cross-section and is made of plate steel, refractory _____. It is welded together with the radiant section, and connected of the convection sectionwith bolts. An observation prot for inspection and maintenance is equipped at the rear end.
Ang daanan ng konbeksyon ay kadalasang may “cross-section” na korteng bilog at ito'y gawa sa plantsadong bakal at “refractory _____. Ito ay iwinewelding sa seksyong “radiant” at ikinokonekta gamit ang mga pangkonbeksyong “sectionwidth” na turnilyo.