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Reg. 115, Reg. 116, Reg. 117
END PLATES

 

End Plates in steam spaces

When the end plates of boilers situated in the steam space are liable to contact with hot gases, the end plates shall be efficiently shielded from such contact.


Reg. 116
END PLATES

 

Hemispherical Crowns

a) All segments shall be pressed in one heat to correct curvature. The adjacent plates shall be closely at the seams and wherever possible at the junction of two seams the plates shall be machined down to provide a fair surface to the joint. If the thinning is done by heating and hammering the plate shall be subsequently annealed.
b) The cylindrical portion of the crown shall be tangential to the hemispherical portion and fit truly to the shell.


Reg. 117
END PLATES

 

Dished End and Crown Plates

a) The dished end plates of boilers shall preferably be in one piece made from one-rolled plate. If this is impracticable owing to the large diameter, the dished end plate may be made from two plates fusion butt welded together and in such cases the requirements of stress relieving and radiographic examination as provided for in Regulation 113 shall apply and the line of weld shall be parallel to the horizontal axis of the boiler.

The inside radius to which a plate is dished shall not be greater than the external diameter of the shell to which it is attached, except in the case of Lancashire and Cornish boilers when the radius shall not exceed 1½ times the diameter of the shell.
b) The inside radius of curvature of the flanges to the shell or firebox shall not be less than four times the thickness of the crown or end plate and in no case less than 2½ inches.
c) The inside radius of curvature to uptakes shall be not less than twice the thickness of the crown plate and in no case less than 1 inch.
d) Bunged mouth-pieces may be welded on to end plates in place of the orthodox flanging for the attachment of furnace tubes. Such welding shall comply with provisions of Regulation 125.
e) Manhole frames may be similarly welded on the front end plates, and will be subject to provisions of Regulation 125.

 
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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