8.13　Throat Spray Device

8.13.1　The materials as specified in the design document shall be filled between the stub pipe of the spray device and a water gun.

8.13.2　The filling（padding）between the spray device and the upper flanged joint surface of the blast furnace shell shall meet the provisions of the design document.The flanged joint shall meet the requirements of Item 5 of Article 6.11.1 of this standard.

8.13.3　The coating on the surface of the spray device shall meet the requirements of the design document.The requirements of Section 6.12 of this standard shall be met when there is no requirement in the design document.