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-welding Preparation: For thicknesses under 4mm, no bevel is required; welding can be done directly with a single-sided pass. For thicknesses between 4mm and 6mm, double-sided welding can be performed with unbeveled joints. For thicknesses above 6mm, typically a V or U groove, or an X-groove bevel is recommended.

Secondly: Clean the weldments and filler wire of oil and oxides to ensure welding quality.

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

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 weldment.

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

(3) Welding arc and arc film, with an arc length range of approximately 0.5 to 3mm, corresponding to an arc voltage of 8~10V.

(4) Welding Speed: Selection should consider factors such as current size, sensitivity of the welding material, welding position, and operation method.