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The Keys to Some Common Questions About Seamless Steel Pipes
Jan 26, 2022
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Here are the keys to some common questions about seamless steel pipes.
The seamless steel pipe has a hollow section. A large number of them are used for conveying fluid pipeline, such as conveying oil, natural gas, gas, water and some solid material pipeline. Compared with solid steel such as round steel, seamless steel pipes have the same bending, torsional strength and lighter weight. Therefore, it is a kind of economic section steel.
It is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle frames and steel scaffolding used in construction. Other circular parts are made of steel pipes. It can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing time. It has been widely used in the manufacture of seamless steel pipes.
1. What need to pay attention to when you buy seamless steel pipes?
According to the different manufacturing and geographical environment, we analyze seamless steel pipes from all aspects. With the manufacturing of seamless steel pipes, it is also developing forward. In the past market sales of seamless steel pipes, there have been various specifications and types of seamless steel pipes.
Different seamless steel pipes are suitable for the manufacturing industry, there are some differences. Different manufacturing industries of standards and use of the geographical environment of seamless steel pipes are very different. However, there is one category becoming the choice of many manufacturers. That is, seamless steel pipes will be used by many manufacturing industries in many cases, because the quality of seamless steel pipes is higher than other types of seamless steel pipes due to the characteristics of each level.
For example, general seamless steel pipes can exceed certain specifications only in terms of compressive strength. However, in terms of plasticity and acceptance of pipeline, it will suffer great harm. For the domestic water transport manufacturing industry, there is no doubt that some such pipelines can not be chosen.
2. The color difference of seamless steel pipes
The color difference of seamless steel is mainly caused by the strong reaction of iron and zinc. Violent reaction makes the complete coating composed of alloy layer and pure zinc layer become only alloy layer but no pure zinc layer. Gray or dark gray is the color of iron - zinc alloys. In addition, if the quality of zinc solution becomes poor, the iron content in zinc solution will increase.
In addition, due to the iron content, the pure zinc layer on the surface of galvanized will be gray, resulting in color difference. Specific reasons: The materials of electroplated parts contain more carbon, silicon, sulfur and phosphorus elements. The electrochemical reaction between iron and zinc is due to the inert electricity formed by these elements. The relative potential becomes high, which causes the iron and zinc reaction to be intensified.
The zinc bath contains relatively small amounts of metallic elements such as aluminium. For galvanized steel and other materials, it can not effectively inhibit the iron-zinc reaction. The iron content in zinc solution increases, which reduces the quality of zinc solution, improvement measures. We need to choose the appropriate galvanized temperature, adjust the composition of zinc solution according to the material in order to control the content of aluminum and nickel in the appropriate range. Reduce zinc immersion time as much as possible. Cool in water as soon as possible after coming out of the pan. Purify liquid zinc in time to ensure the quality of liquid zinc.
3. Storage methods of seamless steel pipes
The seamless steel pipe is a hollow section steel plate. Undoubtedly, it must be preserved. Selecting suitable locations and warehouses is very important.
Store in the site or warehouse of stainless steel plate, it should be selected in the clean, slow sewer pipe circle point. Avoid the production of harmless acetylene or dust mining enterprises. Clean the poisonous grass and all dirt on the road surface, unremitting cleaning stainless steel surface.
Acid, alkali, salt, concrete and other raw materials corrosive to stainless steel should not be piled up in the warehouse. Different kinds of stainless steel should be distinguished from the pile to avoid the pile mixed and contact corrosion.
They can be put outdoors such as large, medium and small scrap steel, rail, carbon steel, large diameter steel pipes, stainless steel castings, etc.
The following materials can be stored in the natural ventilation high quality material plastic greenhouse, but they must be covered under the pad such as large miniaturized channel steel, disk circle, construction steel, medium specifications model seamless steel pipe, stainless steel wire, galvanized steel wire, etc.
The products like some large, medium and small steel plates, cold rolled plates, steel strips, oxygen cores, seamless pipes or thick wall steel plates of various specifications, cold rolled, cold drawn plates and expensive and corrosion-prone metal can be sent to be stored.
Warehouses should be selected according to astronomical standards. A common sealed warehouse is usually used. Not only does the roof have walls, the doors and windows are tightly connected. The warehouse is naturally ventilated. The warehouse requires natural ventilation. You should pay attention to moisture-proof on rainy days.
The seamless steel pipe has a hollow section. A large number of them are used for conveying fluid pipeline, such as conveying oil, natural gas, gas, water and some solid material pipeline. Compared with solid steel such as round steel, seamless steel pipes have the same bending, torsional strength and lighter weight. Therefore, it is a kind of economic section steel.
It is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle frames and steel scaffolding used in construction. Other circular parts are made of steel pipes. It can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing time. It has been widely used in the manufacture of seamless steel pipes.
1. What need to pay attention to when you buy seamless steel pipes?
According to the different manufacturing and geographical environment, we analyze seamless steel pipes from all aspects. With the manufacturing of seamless steel pipes, it is also developing forward. In the past market sales of seamless steel pipes, there have been various specifications and types of seamless steel pipes.
Different seamless steel pipes are suitable for the manufacturing industry, there are some differences. Different manufacturing industries of standards and use of the geographical environment of seamless steel pipes are very different. However, there is one category becoming the choice of many manufacturers. That is, seamless steel pipes will be used by many manufacturing industries in many cases, because the quality of seamless steel pipes is higher than other types of seamless steel pipes due to the characteristics of each level.
For example, general seamless steel pipes can exceed certain specifications only in terms of compressive strength. However, in terms of plasticity and acceptance of pipeline, it will suffer great harm. For the domestic water transport manufacturing industry, there is no doubt that some such pipelines can not be chosen.
2. The color difference of seamless steel pipes
The color difference of seamless steel is mainly caused by the strong reaction of iron and zinc. Violent reaction makes the complete coating composed of alloy layer and pure zinc layer become only alloy layer but no pure zinc layer. Gray or dark gray is the color of iron - zinc alloys. In addition, if the quality of zinc solution becomes poor, the iron content in zinc solution will increase.
In addition, due to the iron content, the pure zinc layer on the surface of galvanized will be gray, resulting in color difference. Specific reasons: The materials of electroplated parts contain more carbon, silicon, sulfur and phosphorus elements. The electrochemical reaction between iron and zinc is due to the inert electricity formed by these elements. The relative potential becomes high, which causes the iron and zinc reaction to be intensified.
The zinc bath contains relatively small amounts of metallic elements such as aluminium. For galvanized steel and other materials, it can not effectively inhibit the iron-zinc reaction. The iron content in zinc solution increases, which reduces the quality of zinc solution, improvement measures. We need to choose the appropriate galvanized temperature, adjust the composition of zinc solution according to the material in order to control the content of aluminum and nickel in the appropriate range. Reduce zinc immersion time as much as possible. Cool in water as soon as possible after coming out of the pan. Purify liquid zinc in time to ensure the quality of liquid zinc.
3. Storage methods of seamless steel pipes
The seamless steel pipe is a hollow section steel plate. Undoubtedly, it must be preserved. Selecting suitable locations and warehouses is very important.
Store in the site or warehouse of stainless steel plate, it should be selected in the clean, slow sewer pipe circle point. Avoid the production of harmless acetylene or dust mining enterprises. Clean the poisonous grass and all dirt on the road surface, unremitting cleaning stainless steel surface.
Acid, alkali, salt, concrete and other raw materials corrosive to stainless steel should not be piled up in the warehouse. Different kinds of stainless steel should be distinguished from the pile to avoid the pile mixed and contact corrosion.
They can be put outdoors such as large, medium and small scrap steel, rail, carbon steel, large diameter steel pipes, stainless steel castings, etc.
The following materials can be stored in the natural ventilation high quality material plastic greenhouse, but they must be covered under the pad such as large miniaturized channel steel, disk circle, construction steel, medium specifications model seamless steel pipe, stainless steel wire, galvanized steel wire, etc.
The products like some large, medium and small steel plates, cold rolled plates, steel strips, oxygen cores, seamless pipes or thick wall steel plates of various specifications, cold rolled, cold drawn plates and expensive and corrosion-prone metal can be sent to be stored.
Warehouses should be selected according to astronomical standards. A common sealed warehouse is usually used. Not only does the roof have walls, the doors and windows are tightly connected. The warehouse is naturally ventilated. The warehouse requires natural ventilation. You should pay attention to moisture-proof on rainy days.
