How to weld with water with ordinary electrode for ordinary welding machine 5

Ordinary welding rods for ordinary welding machines are difficult to weld with water and cannot be welded directly.

You can first select a nut with an appropriate inner diameter slightly larger than the leakage part to weld it to the base metal (according to the cracks or holes in the leakage part). Appropriately slightly larger welding current to ensure the stability of the welding arc. Arc breaking welding is adopted.

After the welding is completed and the nut is completely cooled, tighten the nut with the bolt winding the raw material belt, and tighten the screw and nut firmly with a wrench to control the water leakage.

If the welding with water is welded according to the conventional welding method, it does not require specific tools, and the operator needs to have a lot of experience in operation, because it is necessary to control the arc of each section of the weld through the operation experience and techniques, and the water can be fixed without extinguishing the arc.

If the welding with water is according to the standard of underwater welding, the electrode is a special underwater electrode.

For example, Broco's Easytouch underwater welding carbon steel, SS-1 underwater welding stainless steel, UW HN-332 underwater welding nickel-based alloy or high-alloy steel, the matching underwater welding gun is the special BR21. Whether it is welding according to conventional standards or welding with water according to conventional standards, the welding machine can be an ordinary inverter welding machine.

It can be welded in water, and ordinary electrodes cannot be welded in water to ensure quality. You can only weld a little bit away from the leakage to narrow the hole and fill the leakage.

I have experience in this, you may have a water welding leak, use a waterproof welding rod 0851-8281688 to weld a nut first, around the welding nut, when the surrounding is welded, then use the bolt suitable for the nut to screw, tighten and then weld, or tighten it directly. That's it.

To use waterproof electrode for water welding: 0851-8281688

Summary. Method 1: The pressure in the pipe should not be too high, the pipe wall should not be too thin, and the welding current should not be too small. Before welding, point a little or a few points next to the hole, then smash it with a hammer to deform the hole, and then weld while smashing, or weld a large nut, and then add a trench and then tighten the screw.

Method 2: Weld the periphery of the leakage point to the leakage point to reduce the leakage area, and use a pointed or flat-headed trench to squeeze the twist seam to create weldable conditions. The first layer is made of E4303 welding rod, and the welding feature is to weld with appropriate current to achieve full sealing; The second layer uses E5015 electrode, and the current is 10% larger than usual during welding, and the method of intermittent welding while cooling is adopted.

In order to ensure the strength of the weld, the weld is finally reinforced.

How to weld with water.

Hello, it is recommended to remove the water first and then weld it<>

Method 1: The pressure in the pipe should not be too high, the pipe wall should not be too thin, and the welding current should not be too small. Before welding, point a little or a few points next to the hole, and then smash it with a hammer to deform the hole, and then weld while smashing, or weld a big screw carefully, and then add a trench and then screw it.

Method 2: Weld the periphery of the leakage point to the leakage point to reduce the leakage area, and use a pointed or flat-headed trench to squeeze the twist seam to create weldable conditions. The first layer is made of E4303 welding rod, and the welding feature is to weld with appropriate current to achieve full sealing; The second layer uses E5015 electrode, and the current is 10% larger than usual during welding, and the method of intermittent welding while cooling is adopted.

In order to ensure the strength of the weld, Chen Xiaohu finally strengthened the weld cover.

The welding method is as follows:

Underwater welding can be divided into three categories: wet welding, dry welding, and local dry welding.

1. Wet welding: Welding is carried out directly in water. Manual arc welding is mainly used. The coating surface of the underwater welding electrode is coated with a waterproof layer, and a large amount of gas is released during the melting process to discharge the water around the welding arc to make the welding process stable.

The hydrogen content in the underwater arc atmosphere is high, and the cooling effect of water on the welded joint is violent, and the joint is prone to hard brittleness and hydrogen cracking. Under normal circumstances, the strength and plasticity of the joint are about 80 and 50 respectively when welding on land, and it is only suitable for the installation, maintenance and emergency repair of non-stressed metal structural parts in water.

2. Dry welding: The welding part and the welder are sealed in a pressure chamber that excludes water, and the welding is carried out in a vapor phase environment. Dry welding is divided into high-pressure dry welding and atmospheric pressure dry welding. Manual arc welding and tungsten inert gas arc welding are mainly used.

The joint performance can be equal to that of land welded joints. Underwater dry welding is generally limited to the welding of high-quality components due to the complexity of the equipment, the high cost, and the limitation of the shape and size of the workpiece.

3. Local dry welding mainly adopts gas shielded semi-automatic welding, which is drained at the welding site to create a local gas phase area and make the welding process stable. The quality of joints for local dry welding is better than that of wet welding, and it does not require large facilities and is more adaptable.

Summary. Pro, the use of the electric welding machine is relatively simple, and you can weld with corresponding preparations. However, it must be used in conjunction with protective tools, such as eye masks and safety gloves for welding.

In addition, when using the welding machine, it must be used in a ventilated environment, and other work should be done after use or during the construction process, and the welding machine should be powered off in time to avoid accidents.

Hello, first turn on the power of the welding machine, put on the eye mask and special safety gloves for welding, and then hold the welding tongs in your hand, and weld the place where you want to weld.

Dear, the use of the welding machine is relatively simple, and you can weld with the corresponding preparations. However, it is important to use it with protective tools, such as eye masks and safety gloves for welding. In addition, when using the electric welding machine, it must be used in a ventilated environment, and other work should be done after use or in the construction process, and the welding machine should be powered off in time to avoid accidents.

Taking AC welding machine as an example, almost all buyers and sellers of welding machines in the market have reached such a consensus: 250A welding machine is only suitable for welding electrodes; The 315A welding machine is only suitable for welding electrodes; The 400A welding machine is suitable for welding electrodes; Obviously, this is a big gap from the national standard. This also shows that when fakes flood the market.

Even the standards have been changed. In fact, when we buy a 400A welding machine from the market and come back, what we really buy may only be a national standard 250A or even smaller welding machine. This is the reason why an AC welding machine of the same model is now one-third lighter than the AC welding machine more than ten years ago.

If it is a load duration rate of 30%, then the welding machine we bought can only be regarded as a 250A welding machine. A real 400A welder should be able to reach a maximum current of 400A and be able to work for a long time at 400A current. That's why some of the same type of welding machines on the market are several times more expensive**.

X0D X0A(2) weldment thickness 4 12 mm, selected electrode diameter 3 4 mm. (3) 12 mm, the diameter of the welding rod is 4 mm.

A common method for plugging leaks by welding under pressure.

Short-tube impulse welding plugging.

There are many leakage defects in the case of leakage caused by the fracture of the pressure gauge, discharge shower pipe and other leading pipes of the pipeline or the sand hole and crack of the weld, which is often manifested as direct injection of the medium, with a large spray pressure in the vertical direction and a corresponding small in the horizontal direction. According to this characteristic, a short pipe with a slightly larger diameter can be welded in addition to the original broken pipe, and then a valve can be installed on the welded short pipe to achieve the purpose of cutting off the leakage. The saddle-shaped reinforcing ring with the outer diameter of the root connection main pipe of the broken pipe should be welded in advance to make the welding of the impulse pipe more reliable and easy.

The valve is ideal for gate valve, which is convenient for better impoundment. This method has a short processing time and simple operation, and can be applied to the leakage fault of medium and high pressure pipelines.

Nut welding plugging.

For some parts of the pipeline with low pressure and small leakage point caused by pitting corrosion, the method of nut welding and plugging can be adopted, that is, the nut with suitable specifications is welded at the leakage point on the surface of the pipeline, and then the bolt is screwed, and finally welded to death to achieve the purpose of plugging the leakage. This method is simple in materials, small in influence, and there is no cross operation of other lathes, plumbers and fitters.

Extrusion welding plugging.

For those flammable and explosive media, the site can not be welded, if the leakage is not large, the internal medium force is not high, and the leakage pipeline has a certain wall thickness, the method of squeezing and plugging the leakage is used. Use a copper anti-solder hammer and chisel to hammer the metal material around the leakage point, squeeze it into the leakage joint, and use the impact force to plastically deform the metal of the pipe to achieve the purpose of plugging the leakage. If it is supplemented by bonding and surfacing welding after extrusion, the effect is better.

This method is more practical.

Direct welding plugging.

For some leakage points that are not large, the pressure is low, the pipeline has a certain metal thickness or position and does not allow auxiliary means, the method of direct welding can be adopted, which is mainly used alternately with the extrusion method, while surfacing welding and extrusion, gradually shrinking the leakage point, and finally achieving the purpose of plugging the leakage.

2) Targeted technical measures for leakage plugging by pressure welding.

The specific technical and environmental conditions should be considered during the operation of pressure welding plugging, and the pressure, temperature, process medium, and pipe factors on the site should be considered, and corresponding targeted technical measures should be taken

The material of the welded pipe and plate matches the material of the original pipe, and the welding material corresponds to the original pipe.

When welding leakage, considering the sensitive effect of the leakage medium on the welding rod during the welding process, the root electrode can be made of materials that are easy to operate and have good welding performance, while the middle layer and cover electrode must be selected according to the requirements of the specification.

In the direct welding process, the welding current can be increased, so that the arc spraying effect is greater than the medium leakage pressure, and then supplemented by extrusion, layer by layer welding to eliminate leakage.

Find an iron wire or something to plug the eye of the needle, try not to leak, and then weld, and weld a small pimple on the outside to ensure the thickness of the weld.

With a welding rod current of 200, remember to weld from the bottom to the top, and be careful of electric shock under the feet.

Suzhou Liansi Electronics **** bar insulated wire welding tape I heard that it is very popular.

What is the thickness of the furnace you use and what is the working pressure in the furnace? It is necessary to understand the working pressure and medium in the furnace before we can prescribe a good prescription for you.