Mainly weld galvanized steel pipes and steel plates, how to weld hot dip galvanized steel pipes

Specifications of galvanized sheet Thickness generally from 0 Width: 1 120 1250 150 Length: There are rolls, there are also box plates, and the length of the box plate is 2, 250 The material is:

SGC, X51D+Z, DC51D+Z, Deep Drawing Galvanized Sheet The relevant product standards all list the recommended standard thickness, length and width of galvanized sheet and its allowable deviation. Generally speaking, the thicker the galvanized sheet, the greater the allowable error, rather than a fixed 0, and the thickness of the plate is generally 0. Galvanized sheet:

Galvanized sheet refers to a steel sheet with a layer of zinc on its surface. Galvanizing is an economical and effective method of rust prevention that is often used, and about half of the world's zinc production is used in this process. What it does:

Galvanized steel plate is to prevent the surface of the steel plate from being corroded and prolong its service life, and a layer of metal zinc is coated on the surface of the steel plate, and this galvanized steel plate is called galvanized plate. For more information, please contact....

When you ask a question, you understand it, and you have to let others understand it before you can give the answer.

If you want to ask, the specifications of welded galvanized steel pipes and steel plates commonly used in home improvement:

1.Welded galvanized steel pipe specifications: 4 points, 6 points, 1 inch, inch, inch, 2 inch, inch, 3 inch, 4 inch, 5 inch, 6 inch, 8 inch and other specifications, longitudinal welded pipe ,...... with a wall thickness of 1-12 thickness

2.Specifications of steel plates: thickness: 1mm, 3mm, 5mm......The width is .4m……The length is4m。

If you don't understand correctly, please ask the question in a different way.

Summary. 01. Grinding before welding.

The hot-dip galvanized steel pipe must be polished off the galvanized layer on the surface before welding, mainly to prevent the zinc layer from evaporating during welding to produce a lot of white smoke, which is harmful to the human body; The second is to prevent the occurrence of bubbles, trachoma, false welding, etc., which makes the weld brittle and reduces the rigidity of the hot-dip galvanized steel pipe.

02. Groove size.

In order to weld through, the groove size of the galvanized pipe must be carefully handled before welding, and the more appropriate break size is between 60 and 65 °, and attention should be paid to leaving a certain gap, and the size of the gap is generally around the center.

How to weld hot-dip galvanized steel pipes.

01. Polishing the hot-dip galvanized steel pipe before welding, the galvanized layer on the surface must be polished off before welding, mainly to prevent the zinc layer from evaporating during welding to produce a lot of white smoke, which is harmful to the human body; The second is to prevent the occurrence of bubbles, trachoma, false welding, etc., which makes the weld brittle and reduces the rigidity of the hot-dip galvanized steel pipe. 02. In order to weld through, the groove size of the galvanized pipe must be carefully handled before welding, and the more appropriate break size is between 60 and 65 °, pay attention to leave a certain gap, and the size of the gap is generally around.

03. When selecting welding rods, the selection of welding rods should be selected according to the base material of the galvanized pipe, generally considering the ease of operation, it is recommended to choose J422. 04. When welding, in order to melt the zinc layer and vaporize and evaporate and escape from the weld, you can first move the end of the welding rod forward by 5 7mm, and then return to the original position to continue welding after the zinc layer is melted.

Summary. Dear, I am glad to answer for you that the galvanized steel pipe that cannot be welded on the specification of electrical galvanized steel pipe can not be welded. According to GB50242-2002 "Code for Construction Quality Acceptance of Building Water Supply and Drainage and Heating Engineering":

Galvanized steel pipes with a pipe diameter of less than or equal to 100mm should be connected by threads, and the surface of the galvanized layer and the exposed threaded part damaged during the threading should be treated with anti-corrosion; Galvanized steel pipes with pipe diameters greater than 100mm should be connected by flanges or ferrule special pipe fittings, and the welds between galvanized steel pipes and flanges should be galvanized twice.

Dear, I am glad to answer for you that the galvanized steel pipe that cannot be welded on the specification of electrical galvanized steel pipe can not be welded. According to GB50242-2002 "Code for Construction Quality Acceptance of Building Water Supply, Drainage and Heating Engineering": Galvanized steel pipes with a pipe diameter of less than or equal to 100mm should be connected by threads, and the surface of the galvanized layer and the exposed threaded part damaged during the threading buckle should be treated with anti-corrosion; Galvanized steel pipes with pipe diameters greater than 100mm should be connected by flanges or ferrule special pipe fittings, and the welds between galvanized steel pipes and flanges should be galvanized twice.

Galvanized steel pipes on electrical engineering.

Dear, it's not possible.

There is no basis.

According to GB50242-2002 "Code for Construction Quality Acceptance of Building Water Supply and Drainage and Heating Engineering.

You are the quality inspection and acceptance specification of water supply and drainage, and my project is an electrical project, and the galvanized steel pipe is used for the cable, so that there is no basis for welding.

In many cases, galvanized pipes may be welded when used, but many people do not know that galvanized pipes cannot be welded if they are strictly speaking, and there are such provisions in the "Code for Acceptance of Construction Quality of Building Water Supply and Drainage and Heating Engineering". In fact, the connection of galvanized pipes does not necessarily need to be welded, and there are special methods such as threads, flanges or ferrule types for connecting galvanized pipes, and they are all simple methods.

Summary. The galvanized welded steel pipe and the hot-dip galvanized welded steel pipe galvanizing process are different, the galvanized welded steel pipe is a cold galvanizing process, and the hot-dip galvanized welded steel pipe is a hot-dip galvanizing process, so the materials are also different.

The galvanized welded steel pipe and the hot-dip galvanized welded steel pipe of Huidong are different from the galvanizing process, the galvanized welded guess steel pipe is a cold galvanizing process, and the hot-dip galvanized welded steel pipe is a hot-dip galvanizing process, so the dry material before the material is also different.

To put it simply: hot-dip galvanized steel pipe: in order to improve the corrosion resistance of the steel search pipe, the ordinary steel pipe is galvanized and poured.

The hot-dip galvanized Shilu steel distribution pipe is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined, and there are still some differences between the two. 1. Different principles 1. Hot-dip galvanized steel pipe: In order to improve the corrosion resistance of steel pipes, galvanized ordinary steel pipes.

2. Hot-dip galvanized steel pipe: Hot-dip galvanized steel pipe is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Second, the characteristics are different 1, hot-dip galvanized steel pipe:

The surface of the galvanized steel pipe should have a complete galvanized layer, and there should be no unplated black spots and bubbles on the bench, and small rough surfaces and local zinc tumors should be allowed. 2. Hot-dip galvanized steel pipe: the uniformity of the galvanized layer, the steel pipe sample shall not turn red (copper plating color) after being continuously impregnated in copper sulfate solution for 5 times.

Third, the use of Wang Chai brigade is different 1, hot-dip galvanized steel pipe: now gas, greenhouses, heating with the kind of iron pipe is also galvanized pipe, galvanized pipe as a water pipe, the pipe produces a large amount of rust and scale, the yellow water flowing out not only pollutes the sanitary ware, but also mixed with the bacteria that breed on the non-smooth inner wall, and the corrosion causes the heavy metal content in the water to be too high, which seriously endangers the health of the human body. 2. Hot-dip plating trapped stool zinc steel pipe:

It is widely used in agricultural greenhouses, fire protection, gas, water supply and drainage and other fields.

The answer is not state]: b

The weld on the inner and outer surface of the welded steel pipe should be straight and smooth, in line with the strength requirements, and the weld should not crack. The galvanized layer of galvanized steel pipes should be complete and uniform. The length of the welded steel pipe with threads at both ends and the galvanized steel pipe is generally 4 0 9 0m, and the length of the unthreaded welded steel pipe with a pipe joint and bush head (pipe hoop) is generally 4 0 12 0m.

The maximum diameter of welded steel pipes and galvanized steel pipes is 150 0mm.

Kiss! Hello, happy to answer your <>

Stainless steel electrodes can weld galvanized steel pipes. After the welding is completed, it is not firm, and the outer layer of the galvanized steel pipe is galvanized, which does not have the ability to prevent rust, and the rust causes the solder joint to break after the welding is completed.

Galvanized steel pipes with hot-dip or electro-galvanized layers on the surface. Galvanizing can increase the corrosion resistance of steel pipes and prolong their service life. Galvanized pipe has a wide range of uses, in addition to being used as a line pipe for general low-pressure fluids such as water, gas, oil, etc., it is also used as an oil well pipe, oil pipe, oil pipe, and oil heater for chemical coking equipment in the petroleum industry, especially in offshore oil fields.

Stainless steel electrode refers to a type of electrode coated with stainless steel as the source material. It can be divided into chromium stainless steel electrode and chromium-nickel stainless steel electrode, which are widely used in chemical, fertilizer, petroleum, medical machinery manufacturing and other industriesExtended information: 1. Through the transition of various alloying elements through the welding core and coating, the weld metal becomes a structure containing a certain amount of austenite and ferrite to ensure that the weld metal has good crack resistance and good resistance to the corresponding medium corrosion.

2. Through the welding core or coating, a certain amount of carbide forming elements (such as niobium, molybdenum, titanium, etc.) can penetrate into the weld metal, and form a stable carbide with carbon to prevent the grain boundary from forming chromium carbide. 3. The increase of carbon will promote intergranular corrosion of austenitic stainless steel (or ferritic stainless steel) welds, so the carbon content in the raw materials of the welding core and coating should be strictly controlled, and it is recommended to use low-carbon or ultra-low-carbon welding cores, and use low-carbon or carbon-free ferroalloys and metal elements as raw materials for coatings. It is better to use stainless steel welding rod for galvanized pipe and stainless steel welding, which is the same as ordinary steel welding, but the stainless steel steel is high, and the welding rod is very sticky and difficult to operate after melting.

Before welding the galvanized welded pipe, it is best to grind off the zinc on the surface or heat it to burn off the galvanized pipe first, so as not to produce a large amount of gas and be prone to porosity. If the requirements are not high, you will work directly, but pay attention to the galvanized combustion, the gas is toxic and a large amount of gas is not easy to operate, which affects the quality of the weld. Hope mine can help you <>

Do you have any other questions?