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The edges of all plates and butt straps shall be machined
or flame-cut by machine and the caulking edges shall be beveled
to an angle not sharper than 70 degrees to the plane of the
plate and between 70 and 80 degrees wherever practicable.
Plates which are to be flame-cut by machine without heat treatment
or subsequent grinding or machining shall not have a carbon
content higher than 0.26 per cent.
Where the carbon content exceeds 0.26 per cent heat treatment,
grinding or machining shall be carried out.
The edges of all plates shall have a smooth finish.
Reg. 100
CONSTRUCTION AND WORKMANSHIP
GENERAL
Normalizing of certain steel plates
All steel plates which are dished, flanged or locally heated
shall be afterwards normalized unless they have been heated
during the operation within the normalizing range.
Reg. 101
CONSTRUCTION AND WORKMANSHIP
GENERAL
Minimum thickness of Plates
No boiler plate shall be less than ¼ inch in thickness. |
