![]() Prevalent at top edge of PB filletĬurrent too high, travel speed too fast, incorrect torch angle, inadequate cleaning Incorrect welder technique (see Section 7.4.1), poor earthingįailure to achieve the minimum penetration specified by designĬurrent too low, travel speed too high, incorrect torch angle, incorrect weld prep.įailure of weld metal to penetrate fully root facesĬurrent too low, travel speed too fast, root face too thick, root gap too small, incorrect torch angle, misalignmentĬurrent too high, travel speed too slow, root gap too wide, root face too thin Lack of fusion beneath weld start position Root bead fully penetrated but not fused to root faceĬurrent too low, voltage too low, travel speed too high, root face too thick, root gap too wide, incorrect torch angle, inadequate cleaning surfaces, inadequate joint cleaning, weld preparation too narrowįailure of weld metal to fuse to preceding runĬurrent too low, travel speed too high, incorrect torch angle, inadequate inter-run cleaning Failure of weld metal to fuse to weld preparationĬurrent too low, travel speed too high, incorrect torch angle, oxide film on prep.
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