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Reg. 127
FURNACES

 

Cross Tubes

a)

Cross tubes shall be made from weldless steel pipes or from plate or strip rolled and electric resistance or fusion butt welded pipes by electric arc process. The fusion welding shall conform to the requirements of Chapter XII. Tolerances on these pipes shall conform to the requirements of Regulation 345. Where welded pipes are used, the longitudinal welds shall be so situated that they are not exposed to the direct impact of flame.”

b) Cross tubes shall not exceed 12 inches internal diameter. The minimum thickness shall be 5/16 inch.
c) Where cross tubes are flanged and riveted to the furnace the flanges shall be set to the curvature and taper of the furnace and shall be a good fit before riveting.
d) Where welded construction is employed the tubes shall be of sufficient length to enter the furnace plate and the flush with the water side all round or project not more than 5/8 inch into the water space at any part of the circumference. Where the tubes are fusion welded in position the firebox plates shall be suitably chamfered and the joints shall be welded externally and internally (see Fig 5).

 
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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