Welded pipe

Stainless steel*common welding methods include Manual Metal Arc (MMA) welding, followed by Metal Inert Gas (MIG)/Metal Active Gas (MAG) welding, and Tungsten Inert Gas (TIG) welding.

Pre-weld Preparation: For thicknesses under 4mm, no bevel is required; weld directly, achieving full penetration in a single pass. For 4 to 6mm thicknesses, double-sided welding can be done with non-beveled joints. For thicknesses over 6mm, typically a V or U groove, or an X-shaped bevel is used.

Next: Degrease and descale the welding pieces and filler wire to ensure welding quality.

Welding Parameters: Include welding current, tungsten electrode diameter, arc length, arc voltage, welding speed, shielding gas flow, nozzle diameter, etc.

(1) Welding current is a critical factor in determining weld bead shape. It is typically determined based on the material, thickness, and bevel shape of the workpiece.

(2) The electrode diameter is determined by the size of the welding current; the larger the current, the larger the diameter.

(3) Welding arcs and arc films, with arc length ranging approximately from 0.5 to 3mm, corresponding to an arc voltage of 8~10V.

(4) Welding Speed: Select based on factors such as current size, material sensitivity, welding position, and operation method.