Iso approved nickel graphite gasket suppliers in UAE
What Is the maximum working temperature Nickel Graphite Gasket?
The continuous service temperature (CST) is the maximum ambient service temperature that a material can withstand. That is while retaining 50% of its initial physical properties after long-term service. A nickel graphite gasket certainly provides some of the best corrosion resistance, that much is certain. However, it also has a high working temperature, which makes it particularly useful in applications that demand it. Nickel has a wide working temperature range, starting from cryogenic points up to around 1000 degrees Celsius. However, the maximum continuous service temperature for Nickel 200 gasket is 315 degrees Celsius. Using types like a nickel alloy Kammprofile gasket is even more beneficial in high-temperature applications.
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Is Nickel Alloy Gaskets Rust Proof?
Nickel alloy gaskets have various features, and one of their most important characteristics is corrosion resistance. The mostly used Nickel 200 alloy is 99% pure nickel.
It is rated for high temperatures and can handle excessive humidity. So yes, these are essentially rustproof irrespective of whether it is a nickel flat metal gasket or some other type. The reason for that is the formation of nickel oxide on its outer layer when exposed to corrosion. Some credit also goes to its austenitic structure. As for the overall corrosion resistance, the material is most notably resistant to reducing chemicals. But the gaskets are particularly impressive against caustic alkaline solutions.
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Common Advantages Of Nickel Ring Type Joint Gaskets
Here are the advantages of using Nickel ring type joint gaskets:
- RTJ gaskets made of nickel offer some of the most reliable sealing. These ensure metal-to-metal contact between the flanges.
- These gaskets are rated for high-temperature use of up to 1000 degrees Celsius, which is significantly high. They can also handle high pressure, as well as temperature, pressure fluctuations
- These gaskets are also extremely resistant to corrosion, especially in caustic alkaline solutions.
- The material has excellent thermal and electrical conductivity, as well as magnetostrictive properties.
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What is Nickel Corrugated Gasket Chemical Resistance?
Here are some of the mediums and the chemical resistance of a nickel corrugated gasket in them.
- Sodium Hydroxide (NaOH): The gasket displays excellent resistance to all concentrations of caustic soda.
- Alkalis: The gasket has excellent resistance except for ammonium hydroxide.
- Sulfuric acid: The gasket has moderate resistance to nonaerated sulfuric acid solutions near room temperature.
- Hydrochloric: Limited resistance in specific environments is observed in the gasket.
- Hydrofluoric: Gaskets made from nickel show good resistance to anhydrous hydrofluoric acid even at high temperatures. Also, Nickel has limited resistance to aqueous HF solutions.
It must be noted that oxidizing acid chlorides such as ferric, cupric, and mercuric are very corrosive to Nickel gaskets.
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3 Reasons to Use Nickel Alloy RTJ Gasket?
It may be confusing at times to determine which type of nickel gasket to choose. Especially when there are options like nickel envelope gasket, RTJ gaskets, flat ring gaskets, and all these types
But here are three solid reasons why you should consider a Nickel alloy RTJ gasket.
- The application uses RTJ flanges, so you have little option but to choose an RTJ gasket.
- Corrosion resistance is a priority for the application. Sure there may be others, but nickel is a clear choice for better corrosion resistance.
- Your application involves working with high temperatures and pressure, and nickel’s temperature rating is suitable.