Compact Type----the labyrinth and 2 sling devices on the sides of expansion joint make the expansion joint moving axial and radial，no pressure thrust force is delivered. Compared with traditional spherical connection product，the advantage of this design are：The leakage can be reduced by the flange connection；upper and lower tightening units can avoid lateral deflection and make the below pipe contacting closely to the tuyere small sleeve. This type of tuyere stock is application for blast furnace below 500m³.
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