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Selection knowledge of heavy ductile iron manhole cover -
Process Characteristics of Heavy Ductile Iron Well Cover Technology -
How to install the ductile iron manhole cover correctly? -
Performance Characteristics of Heavy Ductile Iron Well Cover -
What are the performance and manufacturing process of nodular cast iron manhole cover?
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What are the properties and manufacturing processes of nodular cast iron? [2023-06-02] What are the properties and manufacturing steps of ductile iron manhole covers? Here is an introduction: Gray iron castings have been used in all key industrial sectors. The unit specifies high compressive strength, plastic deformation, ductility, severe heat resistance, impact resistance of mechanical equipment, heat resistance or ultra-low temperature, specification reliability, etc. In order to better meet this change in application standards, many models of nodular cast iron have given mechanical equipment a very wide range of properties and kissing properties. -
Composition and application of ductile iron manhole cover? [2023-05-26] What is the composition of ductile iron manhole cover? The following is the composition and application of nodular cast iron manhole cover: Iron is a kind of iron carbon alloy with carbon content more than 2%. In industrial production, the carbon content of iron is generally 2.5% - 4%, and it contains C SI, Mn, S, p and other elements are the products of iron ore passing through the ironmaking blast furnace smelter. According to the different shapes of carbon in cast iron, it can be divided into steelmaking pig iron, cast iron pig iron and ductile iron. -
How to improve corrosion resistance of cast iron well cover? [2023-05-19] How to improve the corrosion resistance of cast iron manhole covers? Cast iron manhole covers have been used for many years. It can be said that the anti-corrosion performance of cast iron well covers must be good. If you want to withstand such a test, you must have a good anti-corruption performance. If you want to achieve this effect, you must go through strict treatment to achieve it. It is coated with asphalt, and the pipeline is preheated before painting to accelerate the adhesion of asphalt and fast drying. There is also aluminate coating, which is very suitable for anti-corrosion coating. Ball mill well cover is a kind of cast iron. After cast iron and spheroidizing treatment, it is spheroidal graphite, which can effectively improve the performance of cast iron, especially improve the plasticity and toughness of products, and reach a stronger steel graphite than mine. -
How to judge whether the ductile iron manhole cover is heavy? [2023-05-12] How to judge the weight of nodular cast iron manhole cover? How to judge the weight of nodular cast iron manhole cover? Let's introduce it to you today. There is no difference in the surface of nodular cast iron manhole covers. Apart from different lines, few people can see the difference between manhole cover and manhole cover with their eyes. But do you only know? In different areas, the load standard of ductile iron manhole covers is different. What's the actual situation? Let's take a look according to the content of the article. -
Why does the composite well cover collapse [2023-05-05] Why does the composite well cover collapse? In the whole process of installing the composite well cover, the overall design limit of the well cover and shaft is low, and there is no structural reinforcement and hoisting design scheme of the solid layer. It is unscientific to plan and arrange pipeline engineering projects in the category of mobile expressway. -
How to clean the composite well cover [2023-04-28] Composite well covers are often used in various projects and have many advantages. So, how to clean it during daily use? Steel castings used for composite well covers are usually made in places with more dust, and the dust in the air often falls on the equipment surface. It can be removed with water or alkaline solution. However, sticky dirt needs to be cleaned with high-pressure water or steam. Free iron will rust and corrode the stainless steel on the surface. Therefore, be sure to delete them. The floating powder can be cleaned with dust. Some have strong adhesion and must be fixed with iron sheets. In addition to dust, the surface also contains many iron elements, including cleaning the surface with ordinary carbon steel wire brush, grinding the above non stainless steel products with sand, glass beads or parts and equipment used for ordinary carbon steel and low alloy steel. If used for welding or soiling. -
What is the difference between the composite manhole cover and other manhole covers [2023-04-21] With the continuous development of modern urban construction, the traditional manhole cover has gradually failed to meet the needs of work, so the new composite manhole cover has gradually become the mainstream with its good appearance and performance. Its mainstream is that it has many advantages compared with the traditional manhole cover. -
Where are composite manhole covers and ductile manhole covers more suitable? [2023-04-14] Where are composite well covers and nodular graphite well covers suitable? The composite well cover itself is relatively light and has no connection. It is easy to be washed away by water in rainy days, so it is active to guard against theft. Generally, there are polymer materials, glass fiber materials and resin materials, which cannot be used for large motor vehicle roads. The nodular graphite well cover is hinged so that it will not be displaced or washed away in heavy rain. China's first tier cities such as Beijing, Shenyang, Changchun and Tianjin are all on expressways and urban roads. -
Relationship between service life of floor heating and water temperature [2023-04-07] Why can composite well covers be widely used? Composite well covers are usually made of composite materials. The composite resin well cover has six characteristics: 1. Strong anti-theft performance; 2. Large bearing capacity; 3. Long service life; 4. Beautiful and practical, high grade; 5. High/low temperature resistance, good insulation and corrosion resistance; 6. Anti slip and low noise. -
How to deal with the wear of well cover [2023-03-31] After a long time of use, the well cover will be worn to a certain extent. How to deal with the wear of the well cover? The mold repair machine is often used to repair the mold surface wear and processing defects. This is a new type of high-tech equipment. Its principle is to use high-frequency electric spark discharge principle to conduct heatless surfacing welding on the workpiece to repair the surface defects and wear of metal dies. Small heat affected area, no deformation, annealing, stress concentration and cracking of the manhole cover mould after repair. The surface treatment can also be strengthened to realize the wear resistance and heat resistance of the manhole cover mold. -
Why can the composite well cover be widely used [2023-03-27] Why can composite well covers be widely used? Fiber reinforced materials are widely used in composites. For example, the specific strength and specific modulus of carbon fiber and epoxy resin composites are several times that of steel and aluminum alloys. They also have excellent chemical stability, antifriction and wear resistance, self lubrication, heat resistance, fatigue resistance, creep resistance, noise elimination and electrical insulation properties. The materials with almost zero expansion coefficient can be obtained by composite of graphite fiber and resin. Another characteristic of fiber reinforced materials is anisotropy, so the arrangement of fibers can be designed according to the strength of different parts. The aluminum matrix composites reinforced with carbon fiber and silicon carbide fiber can still maintain sufficient strength at 500 ℃. -
How to ensure the quality of composite well cover [2023-03-24] Composite well cover is a kind of well cover, so how to ensure the quality of composite well cover? 1、 The bearing capacity of the composite well cover is not less than 180KN, the specification and characteristics of the composite well cover are not less than 250KN, and the allowable residual deformation is (1/500) * D. The bearing capacity of the composite well cover is not less than 90KN, the damage bearing capacity is not less than 130KN, and the allowable residual deformation is (1/500) * D.
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