For heads the calculation is: 75t/Rf ( 1-(Rf/Ro))
t = nom. thickness
Rf = Inside Corner Radius (ICR)
Ro = Dish Radius (infinity for flat flanged only)
This semi-automatic welding process utilizes an arc between a continuous wire electrode and the weld pool. Shielding is supplied by an inert gas, which flows around the wire through a gas cup attached to the torch.
This process can be either manual or mechanized. An arc is established between the top of a tungsten electrode and the work piece. The base metal and filler metal are melted, but not the tungsten. A shielding gas flows around the tungsten through a gas cup.
In this manual welding process, an electrode arc is formed between a consumable electrode and the base material. The electrode is covered by a coating that decomposes and melts during welding. This provides a protective atmosphere around the weld area and forms a slag over the weld pool.
This mechanized or automatic welding process utilizes a blanket of granular flux to protect the weld pool from the atmosphere. A wire electrode is continuously fed from a spool by a wire-feed system. This provide high deposition rates and high heat input.