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Reg. 49 C
MATERIALS OF CONSTRUCTION

SEAMLESS FERRITIC AND AUSTENITIC ALLOY STEEL BOILER, SUPERHEATER AND HEAT EXCHANGER TUBES

Expanding or Flaring Test

A section of the tube approximately 100 mm in length shall stand being flared with a tool having a 60 degree included angle until the tube at the mouth of the flare has been expanded to the percentages given below, without cracking.

Ratio of inside diameter to outside diameter

Minimum expansion of inside diameter %

0.9

21

0.8

22

0.7

25

0.6

30

0.5

39

0.4

51

0.3

68

 
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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