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Reg. 12
MATERIALS OF CONSTRUCTION

STEEL PLATES, RIVETS, SECTION AND BARS IN CARBON STEEL

Rolling Margin

No plate or rolled section shall be under the specified thickness at any part, nor more than 5 per cent over the calculated weight, except that in the case of thin plates and wide plates the weight tolerances shall be as set out in the table below:

Schedule of percentage of Rolling weight tolerances for boiler plates

Thickness                                                   Width in inches

Under 48
48 to under 60
60 to under 72
72 to under 84
84 to under 96   
96 to under 108  
108 to under120
120 to under 132 
132 and over   
In
%
%
%
%
%
%
%
%
%
¼ to under 5/16
5
5
5
7
9
12
-
-
-
5/16 to under 3/8
5
5
5
6
7.5
10
11
12
-
3/8 to under 7/16
5
5
5
6
6
8
9
11
15
7/16 to under ½
5
5
5
5
6
7.5
8
9
12
½ to under 5/8
5
5
5
5
6
6
7.5
9
10
5/8 to under ¾
5
5
5
5
5
5
7
8
9
¾ to under 1
5
5
5
5
5
5
6
7
8
1 to under 2
5
5
5
5
5
5
5
9
7


All the above margins will be taken over nett theoretical weight.


 
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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