Message from
Chairman of Central Boilers Board


About Central Boilers
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

Reg. 347 A Reg. 347 B

Flattening test (for pipes up to and including 102 mm. (4 in.) Nominal bore)

As per requirements of Chapter II.

(i) For cold drawn seamless construction-Regulation 39.
(ii) For hot finished seamless construction-Regulation 44(b).
(iii) For molybdenum seamless construction-Regulation 49 (b).
(iv) For Chrome molybdenum seamless construction-Regulation 54(b).
(v) For electric resistance welded tubes-Regulation 59(a).
(vi) For copper steam pipes-Regulation 35.

For pipes where the ratio between the wall thickness and the diameter would not permit the maintenance of the distance between the flat surfaces specified in the above regulation, this shall be limited to 2/3rd the bore of the pipe.





Reg. 347 B

Cold bend test (for pipes over 102 mm. (4in.) Nominal bore)

strip not less than 38 mm. (1-1/2 in.) wide cut circumferentially from one end of each selected pipe shall when cold withstand, without showing either crack or flaw being doubled over in the direction of original curvature round a bar, the diameter of the bar being:-

 
For pipes up to and including 10mm (3/8 in.) thick 3 times the    thickness
For pipes over 10mm. thick 4 times the thickness

 
Back   Top
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