Welded flange

The welded flange is a part of the pipe and pipe connected to each other, and is connected to the pipe end. There are holes on the welding flange, and bolts make the two flanges tightly connected. Seal with gasket. Welded flange is a disc part, which is more common in pipeline engineering.

Flange connection is to fix two pipes, fittings or equipment on one weld. Between the two welding, the flange gasket is fastened together with bolts to complete the connection. Welding is an important way of connection for high pressure pipeline construction. Welded flange connection is easy to operate and can withstand great pressure.

Welding flanges are widely used in petroleum, chemical industry, natural gas, power plants, metallurgical pipelines and other fields.

welding technology

Equipment and tools needed

One set of manual welding equipment, one handle type angle grinder, one electric pneumatic hammer and one plane ruler.

Pre welding preparation

1. check the commissioning equipment to ensure the normal operation of the equipment.

2. prepare the 4.0J506 electrode to dry for 300 hours at -350 C.

welding process

1, assemble the vertebrae and large flanges together according to the drawing requirements, and divide the big flanges into 8 equal parts on average.

2. Because the flange is thicker and the groove is bigger, the segmented symmetry and multi-layer welding are adopted.

Weld quality

The strength of the weld is required to reach at least the strength of the base metal. The surface of the weld is smooth and smooth, and has no defects such as burn through, porosity, welding leakage, slag inclusion, undercut and incomplete welding. The remaining height is less than 2mm.