What is Flanges

Flange, also called flange flange disc or flange. The flange is a part connected between the shaft and the shaft, which is used for the connection between the pipe ends; It is also useful in the flange on the import and export of the equipment for the connection between two devices, such as the reducer flange. Flange connection or flange joint refers to a detachable connection which is connected by flanges, gaskets and bolts as a group of combined sealing structures. The pipe flange refers to the flange of the pipe distribution pipe in the pipe device, and the import and export flange of the equipment is used in the equipment. There are holes in the flange and bolts make the two flanges tightly connected. The flange is sealed with a gasket. Flanges are divided into threaded connection (thread connection) flanges, welded flanges and clamp flanges. Flanges are used in pairs, wire flanges can be used for low pressure pipes, and welded flanges for more than four kilograms of pressure. Put a gasket between the two flanges and fasten them with bolts. Different pressure flange thickness is different, they use different bolts. Pumps and valves, when connected with pipelines, the local parts of these equipment are also made into corresponding flange shapes, also known as flange connections. All the connecting parts that are connected by bolts around two planes and are closed at the same time are generally called "flanges", such as the connection of ventilation pipes, and this type of part can be called "flanged parts". But this connection is only a part of the equipment, such as the connection of the flange and the pump, it is not good to call the pump "flange parts". Relatively small such as valves, etc., can be called "flange parts"

?We can produce flanges of various standards and materials:

• Standard:?EN 1092-1, EN 1759-1,?ASME B16.5,?ASME B16.47,?ASME B16.48, ASME B16.36, MSS SP-44,?JIS B2220, JIS B2291, ect.
• Material: Carbon steel, stainless steel, duplex stainless steel, martensitic stainless steel, alloy steel,?nickel, copper,?titanium, aluminum, ect.
• Type:?welding neck, slip on, blind, socket welding, threaded, lap-joint,?PJ/RJ, PJ/SE, spectacle blind, ect.

I would like to briefly introduce the type of flanges via photos to you:

In addition, we also have customized some special flanges for customers, please see the following pictures:

Welding progress:

• Required equipment:

One set of manual electric welding equipment, one handle Angle grinder, one electric air hammer, one plane ruler.

• Pre-welding preparation:

1. Check and debug equipment to ensure normal operation of equipment; 2. Prepare the φ4.0J402 electrode for drying for an hour at 300℃-350℃.

• Welding process:

1. Assembly Assemble the vertebra and the large flange together according to the requirements of the drawing, and then divide the large flange into 8 equal parts on average.

2. welding because the flange is thick, the groove is large, so the use of segmented symmetry, multi-layer welding.

• Weld quality:

The strength of the weld must reach at least the strength of the base material. The weld surface is smooth and smooth, without burn-out, porosity, welding leakage, slag inclusion, edge bite, incomplete welding and other defects. The residual height is less than 2mm.

• Matters needing attention:

1. the bottom must use J506 welding rod manual surfacing, and use small current welding. Welding in strict accordance with the welding process.

2. After welding a position, use a level to card the deformation of the flange plane.

3. while welding with a gas hammer hammer weld, in order to achieve the role of stress relief.