FAQsGaskets FAQs
Frequently Asked Questions
- How thick should a gasket be?
- How are gasket sizes measured?
- What is gasket width?
- How do you measure a flange?
- For custom designed flanges, how is the gasket width selected if moving to a CorruKamm?
- How often do gaskets need to be replaced?
- Do you need to replace gaskets every time?
- How longs does a rubber gasket last?
- What is a gasket?
- How many types of gaskets are there?
- What are the common types of gasket materials?
- What is the difference between a seal and a gasket?
- Do gaskets need seals?
- Is a gasket a sealant?
- What industries primarily use isolation gaskets?
- When do you use a ring vs full-face?
- For custom designed flanges, how is the gasket width selected?
- How to remove a gasket?
How thick should a gasket be?
- How thick should a gasket be?
- Average gasket thickness ranges from .01 in to .5 in or larger. Thicker gaskets tend to work better for low-pressure applications. On uneven or rough surfaces, a relatively thick rubber gasket may be more effective in adjusting to the wave of the surface. For non-rubber gaskets, such as non-asbestos, semi-metallic, and metallic, thinner gaskets tend to provide a tighter, immobile seal for high pressure applications.
- Is a thicker gasket better?
Thicker gaskets are often used for low-pressure applications. Depending on your application need, thicker gaskets provide better seals for uneven surfaces and can withstand more pressure if retained or constrained.
- Can a gasket be too thick?
Yes. For some applications and gasket materials, a thinner gasket will provide a tighter seal. If your gasket is too thick for your application, it can lead to blow-outs and other issues.
- How much should a gasket compress?
Compression depends on the material of your gasket. For example, solid metal compresses less than 5%, mica compresses 25%, flexible graphite (FG) compresses 50%, and EPTFE compresses up to 70%.
- How do you measure a gasket compression?
To calculate your gasket compression percentage, use this formula: 1 – [(Initial Thickness – Final Thickness) / Initial Thickness]. To calculate residual thickness: (Initial Thickness – Final Thickness) / Initial Thickness.
- How much does gasket thickness change compression?
The impact of gasket thickness on compression depends on your gasket’s material and type. For example, thicker soft gaskets tend to compress more, while thick solid metal gaskets will not compress at all.
- Do I need a thicker head gasket?
Typically, it’s best to follow OEM recommendations on head gasket thickness.
- How much does a head gasket crush?
The amount of crush you can expect depends on the material and initial thickness of the head gasket.
- How thick is a head gasket?
Head gasket thickness will vary based on application and industry. When selecting head gasket thickness, it’s best to follow OEM recommendations.
- How are gasket sizes measured?
- Measurement of gasket size is usually based on the length, height, and width of the pipe you need to seal. Measurement also depends on which industry code applies—for example, the shape of the gasket, which could be round, oval, rectangular, etc.
- How are rubber seals measured?
To measure a rubber seal, you’ll need to measure both the shape and thickness of the gasket.
- How do you measure a gasket flange?
Measure the shape of the location where the gasket will sit and seal. You can measure by using traditional tools or by sending a rubbing of your flange to Lamons, after which we’ll complete the process using our reverse engineering TruFAST™ technology.
- What is a full-face gasket?
A full-face gasket is a gasket that covers the entire flange face, which may exceed the sealing area.
- How is a full-face gasket measured?
To measure a full-face gasket, measure the shape of the location where the gasket will sit and seal, making sure to measure to the outer edges of the flange.
- What is the difference between a flat-face and raised-face flange?
A flat-faced flange is flat across the entire flange, while a raised-face flange has a raised area with an outside diameter concentric to the bore. A flat-faced flange has a larger sealing area than a raised-face flange, and can be used to help prevent flange rotation.
- What is gasket width?
- “Gasket width” usually refers to the radial width of the gasket.
- What is effective gasket width?
Effective gasket width will typically be less than the radial width of your gasket. ASME B31.3 is a good reference for your code calculations.
- How do you determine the width of a gasket?
You can measure the gasket directly, or use code calculations that follow ASME guidelines.
- How do you specify a gasket?
For a piping application, gaskets are specified by size and class of the flange. Specifications vary for other applications and situations.
- What does gasket class mean?
“Gasket class” usually refers to the flange class that the gasket will be put into.
- How do you measure a flange?
- Measure both the shape and size of the flange. You can either use traditional measurement tools or send a rubbing of the flange to Lamons, after which we’ll complete the measurement using our reverse engineering TruFAST™ technology.
- How do you measure a flange hole?
To measure a flange hole, measure from inside edge to edge across the center of the hole.
- What is the diameter of the flange?
Measure from outside edge to edge across the center of the hole. Flange size usually corresponds to the size of the connected pipe.
- What is the difference between a 150 and 300 flange?
A class 150 flange has a lower pressure rating than a class 300 flange. This means that a class 300 flange could be used with any type of gasket, depending on your application.
- For custom designed flanges, how is the gasket width selected if moving to a CorruKamm?
- Start by measuring the available gasket sealing width, and then contact Lamons to find it if the CorruKamm gasket will fit your application needs.
- How often do gaskets need to be replaced?
- Some applications require gaskets to be replaced multiple times a day, while other applications only require replacement every few years. If you’re looking for specific guidance on how often to replace gaskets, contact us to discuss your specific application and needs.
- Why do gaskets fail?
Gaskets can fail for many different reasons. The most common cause of gasket failure is improper installation, such as centering the gasket incorrectly or tightening the fasteners incorrectly.
- Do gaskets wear out?
Yes, gaskets do wear out. The time frame in which they wear out depends on application and gasket material type. Keep in mind that a gasket “wearing out” is different than a gasket needing to be changed. “Wearing out” of a gasket typically implies it’s being used in a dynamic application, which typically reduces the gasket’s lifespan.
- Do unused gaskets go bad?
Whether or not an unused gasket goes bad depends on what material the gasket is made of and the environment in which it is stored. For example, if a plastic gasket is left in the sun for an extended period of time, UV rays could cause the material to degrade.
- What are signs of a bad gasket?
Leaking of the medium you’re trying to seal is an obvious sign of a poor gasket seal. Other warning signs to look out for are erosion or corrosion of the gasket. If you’re concerned about your gaskets’ performance, contact our Engineering team to discuss the right solution.
- Do you need to replace gaskets every time?
- Yes, it’s best practice to replace gaskets on their recommended replacement schedule.
- How much does it cost to replace a gasket?
The true cost of replacing a gasket includes the cost of the new gasket, as well as the cost of the labor and tools required to properly install it. You can learn more about proper installation by exploring our bolt-up and gasket training.
- How long do valve cover gaskets last?
How long a valve cover gasket will last depends on the application of your gasket. To discuss your individual gasket questions, you can contact our Engineering team.
- How longs does a rubber gasket last?
- How long a rubber gasket will last depends on the application of your gasket. To discuss your individual gasket questions, you can contact our Engineering team.
- How many years does rubber last?
How long this material will last largely depends on the application. To discuss your individual gasket questions, you can contact our Engineering team.
- How do you preserve rubber gaskets?
To preserve rubber gaskets, the best practice is to store them in a dark, UV-proof plastic bag and avoid temperature extremes.
- How can I make my gasket last longer?
To make gaskets last longer in service, ensure that you have the right gasket material for your application and that the gasket is loaded correctly. To discuss more ways to maximize your gasket performance, contact our Engineering team.
- Do O-rings have a shelf life?
Yes. Depending on the manufacturer and material, an O-ring typically has a 10-year shelf life, if kept out of contact with temperature extremes and correctly stored in a UV-safe bag.
- What is a gasket?
- A gasket is a seal between two surfaces.
- Where are gaskets used?
Gaskets are used in applications all around us: in our homes, offices, roads, sewer systems, and everywhere in between. Gaskets can range from .24 inches all the way up to 30 feet tall, and are even used in cryogenic conditions up to 2000°F.
- What is gasket in heat exchanger?
A gasket is what seals the medium being cooled from the medium that does the cooling. Most heat exchangers require multiple types of gaskets to create this seal effectively.
- How many types of gaskets are there?
- There are hundreds of different types of gaskets, which fall into 3 main categories of material type: metallic, non-metallic, and semi-metallic. Within each of these categories are specific gasket types designed for different applications.
- What are the different types of rubber gaskets?
In terms of material, shape, and application, there are many different types of rubber gaskets. The most common rubber gasket materials are:
Neoprene
Nitrile (Buna-N)
Ethylene Propylene Diene Monomer (EPDM)
Silicone Rubber
Viton®
Styrene Butadiene Rubber (SBR)
Natural
- What is a ring type gasket?
A ring type gasket is typically a solid metal ring that is used as a gasket.
- What is the difference between a gasket and a seal?
A gasket is a type of seal that creates sealing between two surfaces. Not all types of seals do this: for example, a plug is also considered a seal, but a plug is not a gasket.
- What type of gasket is commonly used to seal high pressure?
The definition of “high pressure” varies across industries, which means that the type of gasket most commonly used to achieve a high-pressure seal will depend on the characteristics of the connection you are sealing. If you want to learn more about the best options for your high-pressure application, contact our Engineering department.
- What are the common types of gasket materials?
- The most common gasket materials are metal, rubber, and PTFE.
- How do you choose a gasket material?
To choose a gasket material, you’ll need to take various factors into consideration, including pressure, temperature, and medium. These factors will help determine whether you should select metal, non-asbestos sheet, PTFE, or rubber. To get specific recommendations on which gasket is best for your application, reach out to our Engineering team.
- What is composite gasket material?
Composite gasket material is made of more than one material type. Some examples of composite gaskets are Lamons HTG and Matrix CPG.
- What is the most commonly used material for a gasket?
The most commonly used material for a gasket varies across applications, but in general, the most common materials are metal, rubber, and PTFE.
- What is the difference between a seal and a gasket?
- A gasket is a type of seal that creates sealing between two surfaces. Not all types of seals do this: for example, a plug is also considered a seal, but a plug is not a gasket.
- Is a gasket the same as an O-ring?
An O-ring is one of many different types of gaskets.
- How long does it take for a gasket to seal?
As long as the gasket is properly installed, it should seal as soon as the connection that holds the gasket is completely assembled.
- Do gaskets need seals?
- A gasket is a type of seal that creates sealing between two surfaces.
- Do you put grease on gaskets?
Whether or not a gasket requires lubrication depends on its specific type and application. For example, most Lamons gaskets should not be greased, but a small amount of lubrication on an O-ring can facilitate assembly.
- How do you seal a rubber gasket?
As long as the rubber gasket is properly installed, it should seal as soon as the connection that holds the gasket is completely assembled.
- Is a gasket a sealant?
- Yes, a gasket can be used as a sealant, whenever “sealant” is defined as “a material used for sealing something to make it airtight or watertight.”
- What industries primarily use isolation gaskets?
- Any industry that requires electrical isolation between two surfaces will use this type of gasket. These industries include Water and Wastewater, Oil and Gas, Power Generation, and more.
- When do you use a ring vs full-face?
- There are many reasons to choose either type of gasket. Factors to consider include controlling bolt load, gasket stress, and flange rotation. For example: industry codes typically call for bolts to be loaded between 40%-70% of their strength. For high strength bolts, 40% strength may be too much for a ring gasket, so a full-face gasket would be acceptable. If you have low strength bolts, you may not have enough force to load a full-face gasket, meaning you should choose a ring gasket.
- For custom designed flanges, how is the gasket width selected?
- We work with customers on a daily basis to design custom solutions. Contact our Engineering team to determine the perfect width for your application.
- How to remove a gasket?
- Some gaskets can simply be removed without tools upon connection disassembly, whereas some will need to be pried or scraped off. The gasket removal process will look different based on your application, but most gaskets are not designed to be reused, therefore it’s okay to destroy a gasket in the process of removing it.
- Is a thicker gasket better?
Thicker gaskets are often used for low-pressure applications. Depending on your application need, thicker gaskets provide better seals for uneven surfaces and can withstand more pressure if retained or constrained.
- Can a gasket be too thick?
Yes. For some applications and gasket materials, a thinner gasket will provide a tighter seal. If your gasket is too thick for your application, it can lead to blow-outs and other issues.
- How much should a gasket compress?
Compression depends on the material of your gasket. For example, solid metal compresses less than 5%, mica compresses 25%, flexible graphite (FG) compresses 50%, and EPTFE compresses up to 70%.
- How do you measure a gasket compression?
To calculate your gasket compression percentage, use this formula: 1 – [(Initial Thickness – Final Thickness) / Initial Thickness]. To calculate residual thickness: (Initial Thickness – Final Thickness) / Initial Thickness.
- How much does gasket thickness change compression?
The impact of gasket thickness on compression depends on your gasket’s material and type. For example, thicker soft gaskets tend to compress more, while thick solid metal gaskets will not compress at all.
- Do I need a thicker head gasket?
Typically, it’s best to follow OEM recommendations on head gasket thickness.
- How much does a head gasket crush?
The amount of crush you can expect depends on the material and initial thickness of the head gasket.
- How thick is a head gasket?
Head gasket thickness will vary based on application and industry. When selecting head gasket thickness, it’s best to follow OEM recommendations.
- How are rubber seals measured?
To measure a rubber seal, you’ll need to measure both the shape and thickness of the gasket.
- How do you measure a gasket flange?
Measure the shape of the location where the gasket will sit and seal. You can measure by using traditional tools or by sending a rubbing of your flange to Lamons, after which we’ll complete the process using our reverse engineering TruFAST™ technology.
- What is a full-face gasket?
A full-face gasket is a gasket that covers the entire flange face, which may exceed the sealing area.
- How is a full-face gasket measured?
To measure a full-face gasket, measure the shape of the location where the gasket will sit and seal, making sure to measure to the outer edges of the flange.
- What is the difference between a flat-face and raised-face flange?
A flat-faced flange is flat across the entire flange, while a raised-face flange has a raised area with an outside diameter concentric to the bore. A flat-faced flange has a larger sealing area than a raised-face flange, and can be used to help prevent flange rotation.
- What is effective gasket width?
Effective gasket width will typically be less than the radial width of your gasket. ASME B31.3 is a good reference for your code calculations.
- How do you determine the width of a gasket?
You can measure the gasket directly, or use code calculations that follow ASME guidelines.
- How do you specify a gasket?
For a piping application, gaskets are specified by size and class of the flange. Specifications vary for other applications and situations.
- What does gasket class mean?
“Gasket class” usually refers to the flange class that the gasket will be put into.
- How do you measure a flange hole?
To measure a flange hole, measure from inside edge to edge across the center of the hole.
- What is the diameter of the flange?
Measure from outside edge to edge across the center of the hole. Flange size usually corresponds to the size of the connected pipe.
- What is the difference between a 150 and 300 flange?
A class 150 flange has a lower pressure rating than a class 300 flange. This means that a class 300 flange could be used with any type of gasket, depending on your application.
- Why do gaskets fail?
Gaskets can fail for many different reasons. The most common cause of gasket failure is improper installation, such as centering the gasket incorrectly or tightening the fasteners incorrectly.
- Do gaskets wear out?
Yes, gaskets do wear out. The time frame in which they wear out depends on application and gasket material type. Keep in mind that a gasket “wearing out” is different than a gasket needing to be changed. “Wearing out” of a gasket typically implies it’s being used in a dynamic application, which typically reduces the gasket’s lifespan.
- Do unused gaskets go bad?
Whether or not an unused gasket goes bad depends on what material the gasket is made of and the environment in which it is stored. For example, if a plastic gasket is left in the sun for an extended period of time, UV rays could cause the material to degrade.
- What are signs of a bad gasket?
Leaking of the medium you’re trying to seal is an obvious sign of a poor gasket seal. Other warning signs to look out for are erosion or corrosion of the gasket. If you’re concerned about your gaskets’ performance, contact our Engineering team to discuss the right solution.
- How much does it cost to replace a gasket?
The true cost of replacing a gasket includes the cost of the new gasket, as well as the cost of the labor and tools required to properly install it. You can learn more about proper installation by exploring our bolt-up and gasket training.
- How long do valve cover gaskets last?
How long a valve cover gasket will last depends on the application of your gasket. To discuss your individual gasket questions, you can contact our Engineering team.
- How many years does rubber last?
How long this material will last largely depends on the application. To discuss your individual gasket questions, you can contact our Engineering team.
- How do you preserve rubber gaskets?
To preserve rubber gaskets, the best practice is to store them in a dark, UV-proof plastic bag and avoid temperature extremes.
- How can I make my gasket last longer?
To make gaskets last longer in service, ensure that you have the right gasket material for your application and that the gasket is loaded correctly. To discuss more ways to maximize your gasket performance, contact our Engineering team.
- Do O-rings have a shelf life?
Yes. Depending on the manufacturer and material, an O-ring typically has a 10-year shelf life, if kept out of contact with temperature extremes and correctly stored in a UV-safe bag.
- Where are gaskets used?
Gaskets are used in applications all around us: in our homes, offices, roads, sewer systems, and everywhere in between. Gaskets can range from .24 inches all the way up to 30 feet tall, and are even used in cryogenic conditions up to 2000°F.
- What is gasket in heat exchanger?
A gasket is what seals the medium being cooled from the medium that does the cooling. Most heat exchangers require multiple types of gaskets to create this seal effectively.
- What are the different types of rubber gaskets?
In terms of material, shape, and application, there are many different types of rubber gaskets. The most common rubber gasket materials are:
Neoprene
Nitrile (Buna-N)
Ethylene Propylene Diene Monomer (EPDM)
Silicone Rubber
Viton®
Styrene Butadiene Rubber (SBR)
Natural
- What is a ring type gasket?
A ring type gasket is typically a solid metal ring that is used as a gasket.
- What is the difference between a gasket and a seal?
A gasket is a type of seal that creates sealing between two surfaces. Not all types of seals do this: for example, a plug is also considered a seal, but a plug is not a gasket.
- What type of gasket is commonly used to seal high pressure?
The definition of “high pressure” varies across industries, which means that the type of gasket most commonly used to achieve a high-pressure seal will depend on the characteristics of the connection you are sealing. If you want to learn more about the best options for your high-pressure application, contact our Engineering department.
- How do you choose a gasket material?
To choose a gasket material, you’ll need to take various factors into consideration, including pressure, temperature, and medium. These factors will help determine whether you should select metal, non-asbestos sheet, PTFE, or rubber. To get specific recommendations on which gasket is best for your application, reach out to our Engineering team.
- What is composite gasket material?
Composite gasket material is made of more than one material type. Some examples of composite gaskets are Lamons HTG and Matrix CPG.
- What is the most commonly used material for a gasket?
The most commonly used material for a gasket varies across applications, but in general, the most common materials are metal, rubber, and PTFE.
- Is a gasket the same as an O-ring?
An O-ring is one of many different types of gaskets.
- How long does it take for a gasket to seal?
As long as the gasket is properly installed, it should seal as soon as the connection that holds the gasket is completely assembled.
- Do you put grease on gaskets?
Whether or not a gasket requires lubrication depends on its specific type and application. For example, most Lamons gaskets should not be greased, but a small amount of lubrication on an O-ring can facilitate assembly.
- How do you seal a rubber gasket?
As long as the rubber gasket is properly installed, it should seal as soon as the connection that holds the gasket is completely assembled.
