A gasket could be a seemingly simple device, but its role in sealing equipment working under pressure is crucial. Such a device must simultaneously withstand pressure, temperature, vibrations, and the medium flowing through the system.
Therefore, when choosing a gasket, its thickness and cost are not the only criteria to consider.
Non asbestos gasket sheets are mostly used for industrial sealing applications where a reliable gasket material is needed, and asbestos fibers are excluded for safety and regulatory reasons. Such sheets are produced in various modifications to meet specific operating conditions, including pressure, temperature, and the medium flowing through the equipment.
Aohong specializes in supplying non-asbestos gasket sheets for industrial applications. But what features should you look for in such sheets for high pressure? What factors should be considered when buying non asbestos gasket sheets? Let us discuss the most important details.
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Non Asbestos Gasket Sheet Overview
Non asbestos gasket sheets are industrial sealing materials. Such sheets are made from a mixture of fibers, fillers, binders, and elastomers. This mixture allows the gasket material to be machined to the desired shape and profile in order to be placed between two mating surfaces and held under pressure.
These sheets may also be cut into different shapes and sizes according to the dimensions of the flanges, pipes, valves, pumps, engines, and other equipment. When choosing sheets for high pressure applications, attention should be paid to their compressibility, which allows the material to fill irregularities on the joining surfaces. At the same time, the mechanical strength of the sheet material should not be lower than standard. Obviously, not all non asbestos gasket sheets are suitable for withstanding high pressure: it depends on the modification.
Choose the Right Gasket for High Pressure
When under pressure, each gasket is subjected to certain loads. Tight connections are achieved only when the mating surfaces adhere to each other due to the elasticity of the gasket. Thus, in order for the gasket to function properly, it is necessary to select it taking into account a number of factors, which may include pressure, temperature, chemical activity of the working medium, compressibility, elasticity, tensile strength, thickness, density, and other characteristics.
One should also consider the mating surface, as the geometry of the flange is important for pressure-containing connections. Obviously, it is unwise to select gaskets for high pressure based only on price or thickness.
Can Non Asbestos Gasket Sheets Be Used for High Pressure?
It all depends on their characteristics. Modern sheets are used in a wide range of industries to seal various types of technological equipment. The mechanical properties of different sheets vary, so their use is indicated for varying operating conditions.
So, some non-asbestos gasket sheets can be selected with a guaranteed maximum pressure value for use in high pressure equipment. At the same time, the properties of such sheets should be chosen based on a combination of factors, including the characteristics of the equipment and the working medium.
Therefore, when choosing such sheets for high pressure equipment, it is important to study their characteristics. The basic characteristics that must be indicated for non asbestos gasket sheets used in high pressure equipment are:
• Maximum pressure capability
• Temperature range
• Chemical compatibility
• Density
• Thickness
• Compressibility
• Tensile strength
• Recovery
• Recommended flange conditions, etc.
The combination of factors and characteristics varies for each application. Therefore, when selecting non-asbestos gasket sheets, it is important to study the available data for each modification and carefully consider the requirements of the equipment.
Properties Should Be Selected for High Pressure Gaskets
There are several key characteristics that may be taken into account when choosing non asbestos gasket sheets for high pressure.
Mechanical Strength
Gaskets should have a set level of mechanical strength so that they do not crumble under pressure. This factor is especially important when selecting sheets for high pressure equipment. In addition, the mechanical properties of the material should ensure that the gasket does not fail during installation and prevent the connection of the parts from coming apart.
Resistance to Pressure
A gasket should have sufficient compressibility so that it can withstand the pressure of the equipment and fill all the gaps on the mating surfaces. However, the compressibility of such sheets is chosen so that a gasket made from them has predictable and stable performance. The compressibility should not be too high in order to avoid permanent deformation of the sheet under pressure. Ideally, the deformation should be elastic and return after the load has been removed.
Recovery
The ability of a gasket to withstand temperature cycling and return to its original shape after being deformed due to pressure and vibrations is equally important. Therefore, when choosing non-asbestos gasket sheets for high pressure equipment, attention should be paid to their resilience.
Resistance to Temperatures
While pressure is a critical factor, the operating temperature of the gasket should not be ignored either. The reason for this is that such devices are often used in equipment subjected to high temperatures, and the performance of the sheet materials is significantly affected by temperature. Therefore, when selecting non asbestos gasket sheets, it is important to take into account their temperature resistance both during operation and during peak loads.
What Fluids Are Non Asbestos Gasket Sheets Resistant To?
This depends on the manufacturer and the type of sheet, since gaskets are used in a wide range of industries. Therefore, non asbestos gasket sheets have different resistance to various fluids and are suitable for use with water, oils, fuel, air, steam, and other substrates. This is just another reason why you need to pay attention to the characteristics of the sheets.
For example, if you plan to use a gasket on a water circuit, it would make no sense to use it on a highly corrosive medium. The chemical resistance of the sheet must be carefully chosen for each application individually.
Thickness for a Gasket Sheet
Non asbestos gasket sheets are produced in different thicknesses, and for each case, there should be selected a thickness of the material that will best satisfy the requirements. It is important to understand that the thicker the sheet, the more compressive properties it has. However, it should be borne in mind that when selecting a sheet, its thickness should be compatible with the surface roughness of the connection and the pressure in the equipment.
Therefore, the choice of the thickness of non asbestos gasket sheets is made taking into account a number of factors, such as the geometry of the joint, the roughness of the mating surfaces, the pressure and temperature of the equipment, and the characteristics of the bolts and their tightening.
The safest solution is to use recommendations from technical documentation from both the equipment manufacturer and the sheet manufacturer.
Factors Should You Consider When Buying Gaskets
If you plan to buy non-asbestos gasket sheets for high pressure applications, then before buying, you should pay attention to a few details for choosing the sheets.
1. Know the Working Pressure
The first factor to consider when buying non-asbestos gasket sheets is working pressure. Of course, you should choose sheets for a given pressure: it is no good if the pressure rises due to changes in the process and the sheets fail. It is a good idea to choose a safety factor, which is usually 1.5.
2. Determine the Operating Temperature
Another critical factor is the operating temperature. For example, there are significant temperature differences for certain types of equipment. When choosing sheets, these temperature ranges must be observed both for normal operation and for peak loads. In addition, temperature variations in the equipment have a considerable effect on the performance of the gasket.
3. Specify the Medium Flowing Through the Equipment
You should also indicate the medium flowing through the equipment, since the working medium may affect the choice of sheets. This applies to water, oil, fuel, air, and steam. In addition, the sheets must resist the aggressive effects of various chemicals.
4. Determine the Dimensions of the Equipment
It is also important to calculate the correct size of non asbestos gasket sheets in order to achieve a reliable seal. When selecting sheets, attention should be paid to both the inner and outer diameters of the flange, as well as the location and diameter of the bolt holes. In addition, it is important to know the thickness of the sheet. Obviously, the main criterion for choosing the size of the gasket is its geometry and the geometry of the connection.
5. Study the Technical Characteristics of the Sheets
Most importantly, you need to clarify the technical specifications of the sheets and carefully study the information provided by the supplier. After all, no one knows the characteristics of the sheets better than their manufacturer. Pay attention to the information provided: pressure, temperature, medium, and other characteristics for each type of non asbestos gasket sheet.
Why Should You Buy Non Asbestos Gasket Sheets From Aohong?
Sometimes, finding a reliable supplier can be as important as choosing the right material. Aohong specializes in sealing products and has extensive experience in the field. Aohong offers customers a range of non-asbestos gasket sheets in different modifications, so that you can find the ideal solution for your equipment.
When choosing a supplier, it is important to consider more than just the product. The experience of the supplier and the quality of the products offered are also important factors. When purchasing sheets for industrial applications, it is important to take into account all details, from product characteristics to product storage.
Aohong can become your reliable supplier of non asbestos gasket sheets, offering a variety of sizes and shapes to help you select the right gasket sheet for your equipment. A careful approach to the characteristics of the sheets and their technical specifications will allow you to achieve the best results.
Installation of Non Asbestos Gasket Sheets
Even the best sheets cannot provide reliable sealing if they are not installed properly. Beforehand, it is necessary to carefully clean and degrease the surfaces to be joined, removing chips, pieces of old gaskets, and any other contaminants. In addition, the gasket should not be damaged during installation.
It is important to remember that bolts should be tightened evenly according to the tightening schedule. This will allow even compression of the gasket and prevent damage to it. Another detail that is often forgotten is the selection of the right size of the gasket. A poorly chosen size will lead to a decrease in the reliability and quality of the seal.
Main Causes of Gasket Failures
Gaskets can corrode, deteriorate, or otherwise be damaged. There are various reasons for this, but most of them are related to either an incorrect choice of material for the working conditions or a careless installation. Some of the most common reasons for such failures include:
Failure to comply with pressure and temperature conditions, incompatibility of materials, incorrect selection of the gasket thickness, improper installation, damage to the mating surfaces, incorrect dimensions of the gasket and lack of inspection and maintenance.
Therefore, to determine the reason of a gasket failure, it is necessary to consider all the factors and conditions that affect its performance.
How Can I Extend the Service Life of My Gaskets?
First of all, it is necessary to choose a reliable supplier who provides high-quality non asbestos gasket sheets, which can withstand the operating conditions of the equipment. In addition, you need to follow all recommendations provided by a supplier regarding the storage and installation of sheets. Prior to installation, the surfaces to be joined and the sheet itself must be carefully prepared and inspected. During installation, it is necessary to follow all the rules and recommendations to achieve the best results.
Finally, it is important to periodically inspect the gaskets and check their condition. Any irregularities should be addressed immediately, as they may be signs of potential problems.
Conclusion
As you can see, gaskets for high pressure equipment require special attention when choosing. Even a device with a seemingly simple design can have a decisive influence on the operation and integrity of the entire system. Non asbestos sheets are a versatile solution for high pressure equipment, but their selection should be based on a detailed analysis of the conditions of use.
Do not select sheets for high pressure based only on their declared pressure resistance: study all the characteristics indicated by the supplier and compare them with the operating conditions of your equipment. When searching for a reliable supplier of sheet gaskets, you should pay attention to all the details that Aohong has highlighted in this guide.
Finally, it should be remembered that a gasket is not selected only by its thickness and strength. It is important to take into account all the conditions of use so that the sheets perfectly withstand pressure, temperature, and other loads.
