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Reg. 126
FURNACES

 

Furnace Crown

a)

The furnace crown shall be made from one plate and the seam connecting it to the furnace shall not fall in line with any circumferential seam of the boiler shell.

b) The furnace crown may be riveted to the vertical portion of the firebox, or alternatively, the joint may be fusion butt welded by the electric arc process, provided the conditions as to fusion welding in Regulation 125 are observed. Where the joint is to be welded the edges of the furnace crown and the firebox body shall be beveled in accordance with Fig. 3 or Fig. 4. The depth of the flange of the furnace crown plate from the commencement of the curvature of the flanging radius shall be not less than four times the plate thickness with a minimum of 1½ inches. On completion of welding the firebox shall be effectively stress relieved by heat treatment (see also Reg. 128).
 
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Message from Chairman of Central Boilers Board About Central Boiler Board History of Indian Boiler Regulations Foreword Contents Chapter Wise Contents Regulation Wise List of Amendments
Indian Boilers Act 1923 Ibr Forms Home Search Help Contact Us