The work environment – especially dirt and humidity – can be significant contributors of hydrogen into the weld puddle.

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The work environment – especially dirt and humidity – can be significant contributors of hydrogen into the weld puddle.



Metal-cored and self-shielded flux-cored wires provide significantly lower diffusible
hydrogen levels than cellulosic Stick electrodes, helping reduce the risk of
hydrogen-assisted cracking.



Welders should grind both the inside and outside surfaces of the pipe one inch from the joint to prevent any contaminants - such as dirt, rust, paint, oils or coatings - from entering the weld pool.  



 



Induction heating helps maintain critical interpass temperature control, removing moisture and hydrogen between passes, further reducing cracking and improving weld quality.



 

In addition to helping drive out hydrogen from the weld, induction heating systems offer improved safety through no exposed heating element, provide more uniform heating throughout the entire joint and
help to control cooling rates.