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Reg. 351

Cast Steel Pipes

(a) The material shall comply with regulations 73 to 80.
b)

The maximum working pressure allowed on cast steel pipes shall be determined by the following formula:-

W. P. = 2 S ( t - .015D - C ) Eqn.(92)
D

where,

t = minimum thickness
W. P = Working Pressure
D = External diameter of pipe
S = Allowable working stress as specified in regulation 343.
C = 0.64 cm(0.25 in).


Maximum Permissible Working Stress for Carbon and Alloy Cast Steel Pipes
(See Regulation 351)

Lower value obtained in each case at the specified temperature calculated on the following basis:-

For service temperature at or
below 454°C (850°F)
T.S. or Et
2.7 1.5


For service temperature
above 454°C (850°F)
Et or Sr or Sc
1.5 1.5
 
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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