The joints (i.e. forming seams) have no wrong edges or the wrong edges are less than the specified values. In general, the amount of wrong edge is less than 8% of the plate thickness, and the maximum is not more than 1.5 mm. 2.
2. In order to ensure that the weld has a suitable depth of penetration and the amount of deposition, to ensure that the weld does not crack, do not burn through, but also to control the height of the weld, so as not to affect the weld height of the external weld.
3. The weld bead is continuously molded to ensure that the external weld after welding.
4. no welding bias, porosity, cracks, slag, burn-through, rewelding and other defects in the weld, the center deviation of the weld is required to be ≤ 1mm.
5. No arc burns, small spatter, no effect on pipe end bevel and surface.
6. The weld is matched with the base material, and the physical and chemical properties of the weld metal meet the requirements.
