Discussion on weld evaluation of dissimilar thickness weldments
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1 As stated in the title, it involves a T-joint of Q345R plates with thicknesses of 12 mm and 36 mm. Argon arc welding is used for the root pass, while welding rods are used for the cover pass. According to Rule 1 in Table 9 of NBT47014-2011 and the principles for welding dissimilar thicknesses, can the four welding procedure specifications, namely GTAW t= 16 and GTAW t= 8, SMAW t= 6, and SMAW t= 40, be used to support the welding of the aforementioned components?
Several welding methods cannot be used on the same welded piece!
The company’s opinion is that for GTAW T=8 and SMAW T=40, the principle of evaluating welds with unequal thicknesses is applied; for GTAW T=16 and SMAW T=40, rule 1 in Table 9 is used
This post was last edited by zjq1962 on 2021-8-5 at 14:38. It’s quite common for a single joint to be formed using several welding methods – is your opinion based on any evidence?
Agreed, is there any relevant evidence?