Ivan Silva
Industrial
I recently was moved on to a project which demands to reverse engineering an tank in order to fabricate another equal ones. Until now I had only worked with automation machines so I’m quite inexperience with tank fabrication so I have some question about it.
The tank main body has 700 mm external diameter and 2 mm stainless steel thickness. In its top there is an 760 mm external diameter flange weld on it. About this flange what’s the common way of locating in the tank? I mean the flange internal diameter must be larger than the tank external diameter in way the main body fits inside the flange? Like in tube and flat flanges fittings?
Considering the flange is a flat bar which will rolled round and welded closed does the process of rolling guarantee certain level of roundess to the internal and external diameter or normally after the roll process the flange is turned in lathe to properly set the internal and external diameter?
Another question the flange has 16 holes in it. Normally does this holes are drilled before the roll process (when the flange is flat bar) or after it was rolled?
The tank main body has 700 mm external diameter and 2 mm stainless steel thickness. In its top there is an 760 mm external diameter flange weld on it. About this flange what’s the common way of locating in the tank? I mean the flange internal diameter must be larger than the tank external diameter in way the main body fits inside the flange? Like in tube and flat flanges fittings?
Considering the flange is a flat bar which will rolled round and welded closed does the process of rolling guarantee certain level of roundess to the internal and external diameter or normally after the roll process the flange is turned in lathe to properly set the internal and external diameter?
Another question the flange has 16 holes in it. Normally does this holes are drilled before the roll process (when the flange is flat bar) or after it was rolled?