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Reg. 130, Reg. 131, Reg. 132
STAYS

 

Bar Stays

Bar stays shall not be welded at any part. They shall preferably have plus threads, the ends of the stays being upset or the middle portion being reduced for this purpose. Stay bars which have been worked in the fire shall be subsequently annealed.


Reg. 131
STAYS

 

Longitudinal Stays

a) Longitudinal and similar solid screwed stays shall be efficiently secured with nuts at each end and not merely revited over. Where they are over 12 feet in length, they shall be supported at intervals of 6 ft. along its length.
b) Where the stay is screwed through both plates, the stay and holes shall have a continuous thread and fitted with nuts and washers on the outside. Where the stay passes through clearing holes an internal nut and washer shall also be fitted. Where the stay is not normal to the surface of the plate the washer shall be shaped so as to form a true surface for the nuts or a knuckle joint may be fitted.
c) In vertical boilers the stays shall either be screwed into both crown plates or screwed into the furnace crown plate and passed through clearing holes in the shell crown plate.



Reg. 132
STAYS

 

Nuts and Washers for Stays

a) The washers shall be at least 2½ times the diameter of the threaded portion of the stay and not less than ¼ inch in thickness.
b) The thickness of the external nuts shall be at least equal to the diameter of the threaded portion of the stay. Where bar stays pass through clearing holes in end plates, internal nuts of a thickness not less than two-thirds of the diameter of the threaded portion of the stay shall be fitted.
 
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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