Why can t you weld on a rainy day? Can you burn electric welding in light rain?

According to the "Unified Standard for the Acceptance of Construction Quality of Construction Projects", which specific article forgot, it was copied during the exam, hehe... You know.

There are several reasons for this:

1。When the human body is wet, the resistance of the body will decrease sharply, and the current passing through the human body will increase at the same voltage, so that the electric shock is more dangerous.

2.Turbid water is electrically conductive, so it can easily lead to electricity leakage.

3.Welding in rainy days with water inclusions causes the welds between the steel plates to not fuse, and the welding quality is not good.

AWS: 2010 Specification for Welding of Steel Structures.

Welding environment. Minimum ambient temperature.

It is strictly forbidden to weld in the following cases:

1) The ambient temperature is lower than -20 (here refers to the temperature immediately adjacent to the weld) 2) The surface of the weldment is wet or exposed to rain or snow, or.

3) high wind speed, or.

4) Welders are exposed to treacherous conditions.

On rainy days, it is not allowed to weld in the open air, and there is no prohibition on indoor welding, but the indoor humidity is a little large, which will increase the tendency of stomatuse.

Didn't say you can't weld on a rainy day. You can't weld in the open air on rainy days, because it's more humid on rainy days, and welding defects are prone to occur, and you can weld on rainy days in the workshop. Some specifications stipulate that the wind speed cannot be welded when it is greater than a certain amount, of course, it is the wind speed of the working point.

If a windbreak shelter is erected, it can be welded.

As long as it rains and no rain protection measures are taken, welding work is absolutely not allowed!

One is the safety issue, if welding.

When the return route leaks, it is easy to make a state and be damaged into an electric shock when it rains. The second is the quality problem, the air is humid in rainy and foggy days, the surface of welding rods and pipe fittings is not dry, and welding is prone to welding defects.

Weld embrittlement, loss of toughness, porosity, etc.

One, it's definitely unsafe, leakage or something.

Rainy day. The air and ground are damp, and there is a high possibility of electric shock, and in addition, welding in a wet place on a sunny day is also dangerous, so certain protective measures must be taken.

Second, it is the quality of welding.

GB50236 "Code for Construction and Acceptance of Field Equipment Industrial Pipeline Welding Engineering" stipulates the humidity, wind speed and other conditions on the site as follows:

The wind speed during welding should not exceed the following provisions, and when it exceeds the regulations, it should.

1.There are windproof facilities.

2.Manual arc welding and submerged arc welding.

Oxyacetylene welding: 8m s

TIG welding carbon dioxide gas shielded welding: 2m s

Relative humidity within 1m of the welding arc range.

The following requirements shall be met.

1.Aluminum and aluminum alloy welding shall not be greater than 80% 2Other materials should not be welded to greater than 90%.

When the surface of the weldment is wet, covered with ice and snow, or when the welder and the weldment have no protection measures during rain, snow and wind, the welder should not be welded!

3. The increase of humidity will lead to changes in the number of pores and the size of the weld, and the presence of pores in the weld will deteriorate the performance of the welded joint, reduce the compactness of the weld, and reduce the mechanical strength and plasticity of the weld joint, especially the bending angle and impact toughness.

It also greatly decreases with the increase of porosity in the weld. This is an action that needs to be strictly avoided.

It's better not to, after all, there is water.

No, welders are prone to colds and colds.

Welding operations cannot be carried out in rainy days with relative humidity.

restrictions. Neither safety nor production quality is allowed.

The question you ask is like: Can you without wiping your belly, and the answer is the same: "It's okay in special circumstances, but it's generally not done." ”

Welding is such a special hot job. Relative humidity of 90% is not allowed. I haven't heard of the rain in the field without protective measures.

Welding in the rain has a great impact on the welding seam forming, and the increase of humidity will lead to the change of the number and size of pores in the weld, and the existence of pores in the weld makes the performance of the welded joint deteriorate, reduces the compactness of the weld, and reduces the mechanical strength and plasticity of the weld joint, especially the bending angle and impact toughness are reduced more. The fatigue strength under dynamic load also decreases significantly with the increase of porosity in the weld. This is an action that needs to be strictly avoided.

Be sure to do a good job of safety protection when there is an impact on the work.