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. 348

Method of manufacture, Heat treatment and Marking

a) (i) The cold drawn seamless carbon steel pipes and welded carbon steel pipes shall be supplied in normalised condition

(ii) Hot finished seamless carbon steel pipes shall be supplied in hot finished condition or in normalised condition at the option of the manufacturer.

(iii) The seamless alloy steel pipe either cold finished or hot finished and welded pipes shall be supplied in normalised and tempered condition.

(iv) By agreement between the users and the manufacturer, the pipes may be delivered in a condition other than normalised and tempered condition in which case they shall be suitable for subsequent manipulation and the user shall be informed of the heat-treatment necessary to give required properties.
b) (i) Pipe bending and forming (viz. reducing/swaging) operation shall be done by any hot or cold method and to any radius which shall result in a surface free from cracks, buckles or other defects as determined by the method of inspection specified in the design. A post bending or post forming heat-treatment for carbon steel material is required with a nominal wall thickness in excess of 19.0 millimetres unless the bending or forming operation are performed and completed at normalizing temperatures, where no further heat treatment is required. The heat treatment where required shall be normalized or stress-relieved, as the case may be.

(ii) A post bending or post forming heat treatment shall be required for all ferritic alloy steel material with nominal pipe size 100.00 millimetres and larger or with a nominal thickness 13.0 millimetres or greater.

(iii) If hot bending or forming is performed, the material shall receive normalize and temper or tempering heat-treatment as required by the design. For cold operation, tempering heat-treatment shall be applied.
c) Marking:-Marking shall be carried out in accordance with regulation 395F.
 
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