The heat from welding causes metallurgical changes in the parent material immediately adjacent to the fusion boundary or fusion line. Joint preparation dimensions are dependent upon the choice of process, any access restrictions and the material thickness. The third potential source of overwelding is parts fitup. The examples use a fillet weld for ease of comparison. The transition point usually occurs with fillet welds of less than 5.
Steelwork contractors may have their own corporate template but all include the essential information to enable the proper instruction to be communicated to the welder.
Cracking can lead to brittle failure of the joint, with potentially catastrophic results. The plates and the pWPS are presented to the welder; the test is conducted in the presence of an examiner usually from an independent examining body and a record maintained of the actual welding parameters along with any modifications to the procedure needed. Florida West Coast - Section It is wise to test all welding procedures to the limit of potential application, to avoid repeating similar tests in the future. This is achieved either by using drying ovens and heated quivers to store and handle the product, or by purchasing electrodes in sealed packages specifically designed to maintain low hydrogen levels.