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Reg. 517

STANDARD CONDITIONS FOR THE DESIGN AND CONSTRUCTION OF ECONOMISER, FEED PIPES, FEED HEATERS AND OTHER SIMILAR VESSELS

Steel Economisers with or without cast Iron Sleeves on the tubes

Attachment of tubes to headers

a)

Tubes shall be connected to the tube plates by one of the following methods:-

1) Expanding with bell mounting or seal welding.
2) Strength welding.
3) Mechanical bolted joint.
b) Rolled expanded tubes shall project through the neck or bearing part in the holes by at least quarter of an inch and shall be secured from drawing out by being bellmouthed to the extent of 1/32” for each inch in diameter plus 2/32”.
c) Tubes expanded into headers may be seal-welded inside or outside the header. Where a seal weld is provided inside the header, the tube end projection and bellmouthed specified in (b) is not required.
d) In the case of roller expanded tubes the tube holes in the headers shall be formed in such a way that the tubes can be effectively tightened in them, there shall be a neck or belt of parallel seating of at least ½ inch.
e) Where the tubes are strength welded direct to the headers, the technique followed shall be approved by the Inspecting Authority and all welds shall be suitably heat treated.
f) Bolted joints shall be designed in accordance with Regulation 518.
g) Tube spacers supporting clips and lugs may be welded to the tubes.
h) The tubes shall be so arranged that they are accessible for cleaning internally and externally.
 
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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