Can the cast iron elbow be welded if it leaks, and can the malleable cast iron elbow be connected to

1. Iron castings can be welded, but the weldability is poor, so it is recommended not to weld.

2. Elbow In the pipeline system, the elbow is a pipe fitting that changes the direction of the pipeline. According to the angle, there are 45° and 90°180° three most commonly used, in addition to 60° and other abnormal angle elbows according to the needs of the project. The materials of elbows are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics.

The methods of connection with the pipe are: direct welding (the most commonly used method) flange connection, hot melt connection, electric fusion connection, threaded connection and socket connection. According to the production process, it can be divided into:

Welding elbows, stamping elbows, push elbows, casting elbows, butt welding elbows, etc. Other names: 90 degree elbow, right angle bend, love and bend, etc.

3. A general term for cast iron alloys mainly composed of iron, carbon and silicon. In these alloys, the amount of carbon is greater than what can be retained in the austenitic solid solution at eutectic temperature.

It doesn't seem to work, I remember that cast iron had poor welding properties.

If you are mistaken, please forgive me.

If it is a small trachoma leakage, it should be possible to use a composite glue to quickly fill the leak when the work is stopped, combined with a special cotton cloth or cotton strip to plug, this glue will be quickly hardened after blending, and the work must be completed quickly, the effect is very good, there are special for steam leakage, I have seen people use it before, what name and brand department is clear, you can go to check.

The welding of malleable cast iron and steel pipe needs to be welded with cast iron electrodes suitable for dissimilar welding of cast iron and steel, for example, wewelding777 cast iron electrode welding can be selected, and the current of 90-110A is used in the welding process, no preheating, no weld heat treatment, but the heat input is minimized, and the welding777 has a very good anti-crack effect, which can reduce the crack risk of welding carbon steel and cast iron dissimilar metals.

According to the situation you described, the gas connection pipe leaks, you should ask the gas company to send professionals to inspect and repair, instead of dealing with it privately, it is very dangerous to do this, the maintenance and transformation of the gas pipeline is a technical job, ordinary people can not do it, and besides, the glue can not plug the leakage, do not close the door, otherwise the future will be endless.

No, solder wire cannot be soldered iron.

I have a good way, it works, there is water on the surface of the drain pipe, touch it with dry cement powder (with gloves) and it will not leak if it dries. I don't tell him about ordinary people.

Cast iron elbow is a type of pipe fitting, which is mainly made of cast iron material. With the development of the economy, the use of cast iron pipe fittings is more and more extensive, the cast iron surface spraying, combined with the advanced production technology and equipment application, the production of cast iron clamps, not only to meet the needs of the usual production days, but also to fill the domestic gap. The main point is the ** discount.

The elbow is used for the connection at the bend of the pipeline. Connect two pipes with the same nominal diameter to make the pipes turn at an angle. Distinguish carbon steel elbows, cast steel elbows, alloy steel elbows, stainless steel elbows, copper elbows, aluminum alloy elbows by material.

The elbow is a kind of connecting pipe fitting commonly used in cast iron pipe fittings and cast iron elbow equipment, which is used for the connection of pipeline bends.

The elbow is in the pipeline system, and the elbow is a pipe fitting that changes the direction of the pipeline. According to the angle, there are 45° and 90°180° three most commonly used, and other abnormal angle elbows such as 60° according to engineering requirements. The materials of elbows are cast iron, stainless steel, alloy steel, calcinable iron, carbon steel, non-ferrous metals and plastics.

The methods of combining with the pipe are: direct welding (the most commonly used method) flange connection, hot melt connection, electric fusion connection, threaded connection and socket connection.

Elbow manufacturers distinguish carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon leach, PVC, PPR, etc., and can be divided into pushing, limiting, forging, casting, etc. According to the production standard, it can be divided into national standard, electric standard, water standard, American standard, German standard, Japanese standard, Russian standard, etc., according to its radius of curvature: it can be divided into long radius elbow and short radius elbow.

A long-radius elbow refers to the outer diameter of the tube whose radius of curvature is equal to a multiple, i.e., r=. A short radius elbow means that its radius of curvature is equal to the outer diameter of the tube, i.e., r=. (d is the diameter of the elbow, r is the radius of curvature).

According to the use of different shapes, it can be divided into: groove elbow, ferrule elbow, double socket elbow, flange elbow, reducer elbow, seat elbow, surface and inner tooth elbow, stamping elbow, push elbow, socket elbow, butt welding elbow, inner wire elbow.

This makes sense and the drawing is very troublesome, and it can't be explained clearly here, and it's better to buy a sheet metal under the cherry blossom material atlas. Because since the metal is made of iron plates, there is no Vorna who does not use this atlas.

At present, there is no need for ball mill cast iron drainage system in the project, and the only way to replace it is to leak water, and PP pipes are currently used.

If the elbow leaks, the first thing to see is whether the manufacturer who makes the elbow does not reach the compression, if so. Then there is only replacement, if not, welded with cast iron electrodes.

By the way, ductile iron can only be welded, not welded.

1. Poor conditions of the bottom of the pipeline will cause uneven subsidence of the pipeline and the foundation, usually forming partial water accumulation, and cracking of the pipeline or interface in severe cases. The following precautions should be applied: a

Carefully construct according to the planning requirements to ensure the strength and stability of the pipeline foundation. When the geological and hydrological conditions of the local foundation are poor, soil replacement should be carried out to improve the bearing capacity of the bottom of the foundation groove bIf the soil at the bottom of the trough is disturbed or soaked in water, the soft soil layer should be excavated first, and then the over-excavated part should be backfilled with sand or gravel and other stable materials.

c.When excavating earthwork below the groundwater level, useful methods should be adopted to do a good job of drainage and precipitation at the bottom of the foundation groove. Ensure dry groove excavation, if necessary, reserve 20cm 30cm thick soil layer at the bottom of the groove pit, and close with digging during the follow-up process construction, 2. The amount of pipe raw materials is poor, there are cracks or part of the pipe wall concrete is lax, the impermeability is poor, and water leakage simply occurs.

3. Poor pipeline interface packing and construction quality, interface cracking under the action of external force, its prevention methods: aSelect the interface packing with excellent quality and arrange the construction according to the experimental matching ratio and reasonable construction technology.

b.The joints of the interface should be clean, and the cement filler interface should be moistened in advance, and the oily ones should be dried in advance and then brushed with cold root oil, and then carefully constructed in accordance with the construction operation procedures.

4. Check the poor construction quality of the well, and the leakage of the well wall and the contact with it. Its precautionary measures: a

Check that the masonry mortar of the well should be plump, and the joints should be all and not lost; b.The outer surface of the pipe that is continuous with the viewing well should be moistened and evenly brushed with a cement mortar, and then the surface and the inside should be plastered after the slurry is in place to prevent leakage.

The material of the cast iron elbow is the material of pig iron. Pig iron is fragile.

So if you fall, it will definitely be easy to crack.

Cast iron is only one of them, and there are also cast steel, cast copper, cast aluminum and Youbi engineering plastics. The specific selection should be based on the characteristics of the medium used, and it is not arbitrary.