Generaly Hokkai has two ways to form torisphercial, cold press and cold spinning
Cold press can be achieved to ID3200mm with 24mm thickness; cold spinning can be formed with max 9000mm
Hokkai has three types for our Dished Heads, we called them THA, XD and MD, it will be done by cold forming.
THA means 10% Torispherical dished heads and the size is ruled as Crown radius=ID, Knuckle radius =0.1ID;
XD means special torispherical which Crown radius is less than the inner diameter
MD means shallow torispherical dished ends which crown radius is larger than inner diameter
Nomally the carbon steel dished heads will be done as the following process
Product Categories : Carbon Steel Dished Head > Carbon Steel Torispherical Head