How to control the weld shape of SSAW steel pipe

How to control the weld shape of SSAW steel pipe

Usually by adjusting the welding current, arc voltage, welding speed, wire elongation, wire welding head tilt and offset to control the shape of the weld. 

1, the impact of the welding current on weld penetration and weld height is very significant. The larger the current, the greater the penetration, and the greater the weld height is. 

2, the arc voltage and the wire elongation are also of great impact on the weld width.The bigger the arc voltage and wire elongation is, the greater the weld width.

3, the faster the welding speed, the smaller the width of the weld, and the smaller the penetration depth.

4, the wire inclination is of great influence on the shape of the weld. The welding wire deviates from the vertical line in the welding direction, the weld penetration increases, and the width decreases; if the wire deflection departure from the welding direction, the weld penetration depth decreases, and the width increases.

5, the welding head offset distance refers to the horizontal radial distance from the weld point to the pipe center, is also of great impact on the shape of the weld. This is a peculiar problem for spiral SSAW steel pipe, few in LSAW steel pipe. As the spiral pipe welding process is carried out in the state of the tubular body for spiral movement, it will cause the flow of the molten iron, and affect the weld forming. Select the appropriate offset to help weld forming and to obtain a satisfactory appearance of the shape. The greater the offset, the smaller the bead height.