Pipeline welding
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For pipeline welding (DN100), GTAW is generally used for the root pass and SMAW for the fill pass. If SMAW is used for all passes, can it ensure that the radiographic inspection results are satisfactory? Is the probability of defects being higher? Are there higher requirements for welders? Let’s compare. Thank you.
With the SMAW welding method, it is difficult and unstable to achieve single-sided welding with double-sided formation while meeting the RT requirements. . It’s mainly a problem with root fusion; therefore, unless it’s absolutely necessary, it’s still important to use the correct welding method. . Using gas shielded welding for the root pass is the correct choice.
Could you elaborate on the welding fusion issue at the root of SMAW? Thank you