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. 82
MATERIALS OF CONSTRUCTION

FORGED OR ROLLED PRESSURE PARTS OTHER THAN SEAMLESS DRUMS OF CARBON STEEL

Selection of test pieces

(a) For testing, either the parts themselves shall be used or additional material of sufficient size for test pieces shall be available. In the case of headers for example, surplus lengths for test rings may be used. In the case of flanges swaged in dies, the punching left may be used as test pieces in which case the identity of the material of the punching with that of the flange shall be evidenced in an adequate manner. The test may be performed also on the semi-finished material for example a bar or a billet, provided it is given approximately the same reduction and heat-treatment as the finished forgings. For headers with closed ends, the test rings shall be cut off before dishing or reducing and shall be subjected to the same heat treatment as the headers themselves. In the case of headers which are closed by special covers, the test ring shall be cut off after heat-treatment. Similar procedures shall be followed for test pieces of other forgings.

(b) For testing, piece of one and the same cast of the same heat treatment batch as well as of similar dimensions may be gathered into one group. At least one test piece shall be made from each group.

(c) A proportional test piece with Lo = 5 do shall be used as a test specimen.

(d) Tangential test piece shall be used for headers where practicable. For headers with outside diameter less than 200 mm longitudinal test pieces may be allowed.

(e) Hydraulic Test.- A hydraulic test shall be carried out at the Maker’s works in accordance with the requirements of  regulation 268, if required by the Inspecting Authority.

 
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