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Insulation Gasket and Flange Insulation Gasket Kits – Manufacturer & Supplier
An insulation gasket is a specialized sealing and isolation component used to electrically isolate flanges, prevent galvanic corrosion, and ensure leak-proof performance in pipeline and process systems. Also referred to as a flange insulation gasket or flange isolation kit, it plays a critical role in maintaining pipeline integrity, especially in oil & gas and industrial applications.
Asian Sealing Products manufactures high-performance insulation gaskets and flange insulation gasket kits engineered for reliable sealing, electrical isolation, and long-term flange protection. Our solutions are widely used in demanding industries such as oil & gas, petrochemicals, chemical processing, power generation, and pipeline infrastructure, across India and in global export markets.
Our insulation gasket solutions are manufactured in accordance with international flange standards, including ANSI, API, DIN, BS, AS, and MSSP. The flange insulation gasket kits are designed to suit ASME B16.5 Raised Face (RF), Full Face (FF), and Ring Type Joint (RTJ) flanges, ensuring precise fitment and consistent performance across a wide range of pressure classes and operating conditions.
Each flange insulation gasket kit is produced using advanced insulating materials and supplied as a complete, ready-to-install assembly. The kit includes an insulation gasket, insulating sleeves, insulating washers, and metal backing washers, providing full electrical isolation and corrosion protection in a single system.
With a strong focus on quality, customization, and international compliance, Asian Sealing Products delivers export-grade insulation gasket and flange insulation gasket kit solutions for both standard and custom flange applications worldwide, including critical pipeline isolation and cathodic protection systems.
Usage of industries
Oil and Gas
Chemical Industry
Power Genenator
Mining
Marine
Insulation Gasket
Insulation Gasket and Flange Insulation Gasket Kits – Manufacturer & Supplier
An insulation gasket is a specialized sealing and isolation component used to electrically isolate flanges, prevent galvanic corrosion, and ensure leak-proof performance in pipeline and process systems. Also referred to as a flange insulation gasket or flange isolation kit, it plays a critical role in maintaining pipeline integrity, especially in oil & gas and industrial applications.
Asian Sealing Products manufactures high-performance insulation gaskets and flange insulation gasket kits engineered for reliable sealing, electrical isolation, and long-term flange protection. Our solutions are widely used in demanding industries such as oil & gas, petrochemicals, chemical processing, power generation, and pipeline infrastructure, across India and in global export markets.
Our insulation gasket solutions are manufactured in accordance with international flange standards, including ANSI, API, DIN, BS, AS, and MSSP. The flange insulation gasket kits are designed to suit ASME B16.5 Raised Face (RF), Full Face (FF), and Ring Type Joint (RTJ) flanges, ensuring precise fitment and consistent performance across a wide range of pressure classes and operating conditions.
Each flange insulation gasket kit is produced using advanced insulating materials and supplied as a complete, ready-to-install assembly. The kit includes an insulation gasket, insulating sleeves, insulating washers, and metal backing washers, providing full electrical isolation and corrosion protection in a single system.
With a strong focus on quality, customization, and international compliance, Asian Sealing Products delivers export-grade insulation gasket and flange insulation gasket kit solutions for both standard and custom flange applications worldwide, including critical pipeline isolation and cathodic protection systems.
Usage of industries
Oil and Gas
Chemical Industry
Power Genenator
Mining
Marine
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Insulation Gasket Types
Asian Sealing Products manufactures a wide range of insulation gasket types and flange insulation gasket configurations, designed to match specific flange designs, pressure classes, and operating environments. Each insulation gasket type is engineered to deliver reliable electrical isolation, effective sealing performance, and long-term corrosion protection in pipeline systems. Our flange insulation gasket and isolation kit designs are developed in compliance with international standards and are suitable for applications across oil & gas, petrochemical, and industrial sectors. These insulation gasket types are selected based on flange type, service conditions, and application requirements to ensure optimal sealing efficiency, pipeline isolation, and resistance to galvanic corrosion.
Asian Sealing Products manufactures a wide range of insulation gasket types and flange insulation gasket configurations, designed to match specific flange designs, pressure classes, and operating environments. Each insulation gasket type is engineered to deliver reliable electrical isolation, effective sealing performance, and long-term corrosion protection in pipeline systems. Our flange insulation gasket and isolation kit designs are developed in compliance with international standards and are suitable for applications across oil & gas, petrochemical, and industrial sectors. These insulation gasket types are selected based on flange type, service conditions, and application requirements to ensure optimal sealing efficiency, pipeline isolation, and resistance to galvanic corrosion.
Type D
Type D G10
Type E
Type F
Type F G10 316
Type F G10 PTF
Your Trusted Partner for Reliable Sealing Solutions
Electrical Isolation
Effectively isolates flanges to prevent galvanic corrosion between dissimilar metals
High Thermal Resistance
Designed to withstand extreme temperatures without compromising performance.
Superior Sealing Performance
Ensures leak-proof operation even under high-pressure and corrosive environments.
Corrosion Protection
Provides a strong barrier against moisture and chemicals, extending the life of connected components.
Durable Construction
Made from high-quality materials such as G10, G11, epoxy-coated steel, and PTFE for long-term reliability.
Insulation Gasket Applications
Insulation gaskets are widely used across industries that demand reliable sealing and electrical isolation. Their versatility and durability make them ideal for various challenging environments. Below are some of the key sectors where flange insulation gaskets are commonly applied:
Insulation gaskets are widely used across industries that demand reliable sealing and electrical isolation. Their versatility and durability make them ideal for various challenging environments. Below are some of the key sectors where flange insulation gaskets are commonly applied:
Oil and Gas
- Pipeline connections
- Flange joints in oil refineries
Chemical Processing
- Sealing joints in chemical reactors
- Flange connections in chemical plants
Power Generation
- Boiler systems
- Flange joints in oil refineries
Water Treatment Plants
- Corrosion Prevention in Pipe Systems
- Leak Prevention in High-Pressure Zones
Insulation Gasket Materials
Asian Sealing Products manufactures insulation gaskets and flange insulation gasket kits using carefully selected insulating materials to suit different pressure classes, temperatures and chemical environments. Our insulation gasket solutions are produced using both non-metallic and laminated composite materials, ensuring reliable performance in industrial piping and pipeline systems.
The choice of insulation gasket material plays a critical role in sealing performance, electrical isolation, mechanical strength and long-term durability, especially in high-pressure, high-temperature and corrosive service conditions common in oil & gas and petrochemical industries.
Ring gaskets are manufactured using various materials based on the application’s requirements. The material selection depends on factors such as the type of fluids being sealed, operating conditions (including temperature and pressure), and the overall environment. Here are some common materials used for manufacturing ring gaskets:
Phenolic Insulation Gaskets
Phenolic insulation gaskets offer good mechanical strength and electrical insulation, making them suitable for general industrial and low to medium-pressure flange applications.
Neoprene-Faced Phenolic
This material combines a phenolic core with a neoprene sealing surface, providing improved sealing performance and resistance to minor flange surface irregularities. It is widely used in flange insulation gasket kits where enhanced sealing reliability is required.
G10 / G11 Glass Epoxy Insulation Gaskets
G10 and G11 insulation gaskets provide high mechanical strength, excellent dielectric properties, and superior temperature resistance. These materials are ideal for high-pressure and high-temperature pipeline applications, especially in oil & gas and refinery environments.
Glass Reinforced Epoxy (GRE)
GRE insulation gaskets offer excellent chemical resistance and dimensional stability, making them suitable for aggressive service conditions and corrosive environments.
PTFE Insulation Gaskets
PTFE insulation gaskets provide outstanding chemical resistance and low-friction properties. They are commonly used in applications involving aggressive chemicals, high-purity systems, and process industries.
Custom Composite Insulation Materials
We also offer custom insulation gasket materials and flange isolation kit solutions tailored to specific operating conditions, flange standards, and project requirements, including applications in pipeline isolation and cathodic protection systems.
Product Details
What Does a Complete Insulation Gasket Kit from Asian Sealing Products Include?
A complete insulation gasket kit from Asian Sealing Products is designed to provide reliable flange isolation, corrosion protection, and leak-free sealing in a single, ready-to-install solution. Also known as a flange insulation gasket kit or flange isolation kit, it ensures effective electrical isolation and long-term performance in industrial piping and pipeline systems.
Each insulation gasket kit is engineered for durability, precise fit, and ease of installation, making it suitable for demanding applications in the oil & gas, petrochemical, and process industries.
Standard Components of an Insulation Gasket Kit
Insulation Gasket
A precision-engineered insulation gasket designed to provide effective sealing and electrical isolation between flanged connections, preventing galvanic corrosion.
Insulating Sleeves
Non-conductive sleeves are installed over bolts to eliminate metal-to-metal contact and block electrical current flow across the flange assembly.
Insulating Washers
High-strength, non-conductive washers are positioned on both sides of the flange to maintain complete electrical isolation within the bolting system.
Metal Backup Washers
Robust steel backup washers that provide mechanical strength and protect insulating components during bolt tightening and operation.
Materials and Customization Options
Each flange insulation gasket kit is manufactured using high-performance, corrosion-resistant materials such as G10, G11 glass epoxy, PTFE, and epoxy-coated metals, selected based on operating pressure, temperature, and chemical exposure.
Asian Sealing Products offers custom insulation gasket and flange isolation kits in Type F (Full Face), Type E, and Type D configurations. These kits can be tailored to meet ANSI, ASME B16.5, DIN, API, and other international flange standards, ensuring compatibility across global industrial applications.
TYPE E (Full Face Type Gasket) Insulation Gasket
- Complete electrical isolation
- Enhanced sealing coverage across the entire flange face, including flange bolts
- Prevents flange face corrosion and fluid leakage
- Comes with the same outside diameter as the flanges. Hence, the foreign material collection between the flange faces is prevented
- Ideal for high-pressure and corrosive environments
- Suitable for flat face and raised face flanges
- The E gaskets are available in plain-faced Phenolic, Neoprene-faced Phenolic, and high temperature material like G-10 that offer excellent mechanical strength, chemical resistance, and thermal stability.
Choose TYPE E when your application demands maximum coverage and comprehensive isolation protection.
TYPE F Insulation Gasket
- Designed to fit only the raised face area of flanges
- Provides reliable sealing and electrical insulation
- The outside diameter of the gasket is slightly less than the inside diameter of the bolt circle
- For best results, the flanges must be wrapped with Flange Band Protectors. So foreign materials are prevented from collecting and creating a bridge, thus shorting out the isolation
- Ideal for high-pressure pipeline systems
- Prevents galvanic corrosion between dissimilar metals
Choose TYPE F Insulation Gaskets when you need a compact, high-efficiency sealing solution tailored for raised face flange designs.
Type D (RTJ Type Gaskets)
- Precisely fits RTJ flange grooves for optimal sealing
- Provides strong electrical insulation and mechanical strength
- Ideal for extreme pressure and temperature environments
- Prevents leakage and flange corrosion
- Available in Phenolic and G10 material types
- Suitable for critical oil & gas, petrochemical, and power industry applications
For a robust, leak-proof, and electrically isolating solution in RTJ flange systems, TYPE D Insulation Gaskets deliver trusted performance and durability.
G10 / G11 with Viton / Spring energized Gaskets
- G10/G11: High-pressure insulating laminates known for their mechanical strength, thermal stability, and excellent electrical insulation.
- Viton: A fluoroelastomer known for exceptional resistance to chemicals, oils, and heat, enhancing gasket durability and sealing capability.
- Spring Energized Gaskets incorporate a flexible metallic spring core wrapped with a resilient sealing material such as PTFE or elastomers. This design maintains consistent sealing force even under fluctuating temperatures and pressures, ensuring leak-tight performance in dynamic conditions.
Features-
- Maintains strong sealing force over a wide temperature range
- Excellent chemical and abrasion resistance
- We use a machined glass-reinforced epoxy (GRE) resin with an O-ring or spring-energized seal to produce this insulation set
- These gaskets can be used for flange ratings from class 150 to 600
- Improves compressive strength over conventional insulation sets
- Provides greater resistance to over-compression and cracking
- Ideal for applications with thermal cycling and mechanical vibrations
- Provides long service life and reliable sealing in demanding conditions
Metal Core with G10 / G11 Gaskets
Metal Core Gaskets with G10/G11 Insulation combine the mechanical strength of a robust metal core with the excellent electrical insulation and chemical resistance of G10 or G11 laminate materials. The metal core provides structural support, ensuring the gasket maintains its shape and withstands high pressure and mechanical stress, while the G10/G11 layers prevent galvanic corrosion by electrically isolating flanged connections.
Features:
- Strong metal core for enhanced mechanical stability
- High-quality G10/G11 insulation for excellent electrical isolation
- Resistant to chemicals, heat, and pressure
- Prevents galvanic corrosion in flanged joints with dissimilar metals
- Suitable for harsh environments including oil & gas, petrochemical, and power industries
- Highly reliable for both insulating and general sealing purposes in critical services
- These gaskets have a proven track record of integrity in aggressive sealing situations
- Suitable for all services up to and including ANSI 2500# and API 15,000# classes
- Metal Core with G10/G11 gaskets consists of a PTFE (Teflon) spring-energized face seal, or an elastomeric o-ring
- Accommodated in an insulating laminate that is permanently bonded to a high-strength metal gasket core.
Why Choose Asian Sealing Products for Insulation Gaskets?
Asian Sealing Products (ASP) is a trusted manufacturer of insulation gaskets, flange insulation gaskets, and flange insulation gasket kits for critical industrial applications. Our solutions are engineered to provide reliable electrical isolation, corrosion protection, and long-term sealing performance.
Why ASP:
- Premium Materials: G10, G11, PTFE, and Viton for durability, chemical resistance, and thermal stability
- Complete Range: Type F (Full Face), Type E, and Type D insulation gasket designs
- Effective Electrical Isolation: Prevents galvanic corrosion in demanding industries
- Standards Compliant: Manufactured to ASTM material standards and ANSI / ASME B16.5 specifications
Choose Asian Sealing Products for high-quality insulation gaskets and flange insulation gasket kits that deliver consistent performance and extended service life.
How to Select the Right Insulation Gasket Material ?
Selecting the correct insulation gasket material is critical to ensuring reliable sealing performance, effective electrical isolation, and long-term durability in pipeline and flange applications. The choice depends on several key operating and environmental factors.
1. Operating Temperature
The temperature range of the application plays a major role in material selection:
- Low to Medium Temperature: Phenolic, Neoprene-faced phenolic
- High Temperature: G11, PTFE
- Extreme Conditions: Mica-based or advanced composite materials
Choosing a material outside its temperature limit can lead to gasket failure and loss of sealing integrity.
2. Pressure Class
Higher-pressure applications require materials with greater mechanical strength:
- Low to Medium Pressure: Phenolic materials
- High Pressure / Critical Applications: G10 / G11 glass epoxy
For high-pressure pipeline systems, laminated composites like G10 and G11 provide superior performance.
3. Chemical Compatibility
The type of media flowing through the pipeline determines chemical resistance requirements:
- Aggressive Chemicals: PTFE insulation gaskets
- Hydrocarbons / General Media: Phenolic or GRE
- Corrosive Environments: GRE or PTFE
Proper material selection prevents chemical degradation and leakage issues.
4. Electrical Isolation Requirements
Electrical properties are essential in applications involving cathodic protection systems:
- High dielectric strength materials like G10, G11, and Mylar are preferred
- Ensures effective isolation and prevents galvanic corrosion between flanges
5. Flange Type and Standards
Material selection must align with flange design and international standards:
- Compatible with ANSI / ASME B16.5, API, DIN, and BS flanges
- Suitable for RF, FF, and RTJ flange types
Correct matching ensures proper fitment and sealing performance.
6. Environmental Conditions
External conditions significantly impact gasket life:
- Offshore / Marine Environments: GRE, PTFE
- High Humidity / Water Exposure: Low water absorption materials (G10 / G11)
- Desert / Middle East Conditions: High-temperature resistant materials
7. Custom Project Requirements
For specialized applications, custom material combinations may be required:
- Multi-layer composite insulation gaskets
- Application-specific sealing facings
- Project-based engineering for oil & gas pipelines
Asian Sealing Products offers custom insulation gasket and flange isolation kit solutions tailored to specific industry and project requirements.
Need Help Selecting the Right Insulation Gasket?
Choosing the right insulation gasket or flange insulation gasket kit can be complex for critical applications. Our technical team provides expert guidance based on your pressure, temperature, media, and flange specifications to ensure optimal performance and long service life.
Specifications
Insulation Materials Details
| Sl.No | Insulation Materials | Minimum Dielectric Strength | Maximum Temperature | Compressive strength (psi) | Tensile strength (psi) |
|---|---|---|---|---|---|
| 1 | Phenoilc | 500 volts/mil | 120°C | 25000 | 20000 |
| 2 | Neoprene faced Phenoilc | 500 volts/mil | 120°C | 25000 | 20000 |
| 3 | G10 | 550 volts/mil | 140°C | 50000 | 45000 |
| 4 | G11 | 550 volts/mil | 180°C | 50000 | 43000 |
| 5 | Mylar | 4000 volts/mil | 149°C | 20000 | 25000 |
| 6 | PTFE | 285 volts/mil | 240°C | 23000 | 1450 |
Dimensional Standards
| Flange Standard | Compatibility |
|---|---|
| ANSI / ASME B16.5 | Raised Face (RF), Full Face (FF), RTJ |
| API | Pipeline flanges |
| DIN / BS | European industrial flanges |
| MSSP | MSSP Specialty flanges |
Insulation Gasket Kit Material Options
| Gasket Material | Sleeve Material | Washer (Insulating) Material | Washer (Metallic/Support) |
|---|---|---|---|
| Neoprene-faced Phenolic (Std) | Phenolic (Reinforced) | Phenolic (Reinforced) | Electroplated Steel |
| Neoprene-faced Phenolic (Special) | Nylon | Nylon | |
| Neoprene-faced Phenolic (Special) | Mineral-Filled Nylon | Mineral-Filled Nylon | |
| Neoprene-faced Phenolic (Special) | Polyethylene | Polyethylene | |
| Glass-Reinforced Epoxy (G-10) | Glass-Reinforced Epoxy (G-10) | Glass-Reinforced Epoxy (G-10) | |
| PTFE | PTFE | PTFE | |
| G11 | Glass-Reinforced Epoxy (G-10) | Glass-Reinforced Epoxy (G-10) |
Water Absorption Rates of Insulating Materials
| Material | Water Absorption (%) |
|---|---|
| G10 (Glass Epoxy) | 0.01 |
| G11 (Glass Epoxy) | 0.01 |
| PTFE (Teflon) | 0.01 |
| Mylar (Polyester Film) | 0.8 |
| Neoprene-faced Phenolic | 1.0 – 1.2 |
| Phenolic Resin | 1.1 |
Washer Material – Physical Properties
| Property | Phenolic | G7 | G10 | G11 | Mica | Phenolic |
|---|---|---|---|---|---|---|
| Dielectric strength (Volts/Mil) | 500 | 350 | 550 | 550 | 635 | 500 |
| Compressive strength (psi) | 25,000 | 40,000 | 50,000 | 50,000 | 58,000 | 25,000 |
| Water absorption (%) | 1.6 | 0.07 | 0.1 | 0.1 | 0.5 | 1.6 |
| Operating temperature (°C) | -54 to +104 | -196 to +232 | -196 to +150 | -196 to +200 | 800 | -54 to +104 |
Sleeve Material – Physical Properties
| Property | Mylar | G7 | G10 | G11 | Mica | Phenolic |
|---|---|---|---|---|---|---|
| Dielectric strength (Volts/Mil) | 4000 | 350 | 400 | 400 | 635 | 500 |
| Water absorption (%) | 0.8 | 0.1 | 0.1 | 0.1 | 0.1 | 1.1 |
| Operating temperature (°C) | -59 to +149 | -196 to +232 | -196 to +150 | -196 to +200 | 600 | -54 to +104 |
Sealing Material – Physical Properties
| Viton | -29 to +70 |
|---|---|
| NBR | -54 to +121 |
| EPDM | -54 to +150 |
| PTFE / PTFΕ with Spring Energized | -196 to +260 |
| Mica | 800 |
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Answers to all your possible questions.
What is an insulation gasket?
An insulation gasket is a sealing component installed between flanged joints to provide electrical isolation, prevent galvanic corrosion, and maintain a leak-tight seal in pipeline and industrial systems. It is widely used in oil & gas, petrochemical, and process industries.
What is a flange insulation gasket used for?
A flange insulation gasket is used to isolate flanged connections, preventing electrical current flow between dissimilar metals. This helps reduce corrosion, improve pipeline safety, and extend service life, especially in pipeline and cathodic protection systems.
What is included in a flange insulation gasket kit?
A standard flange insulation gasket kit (also called a flange isolation kit) includes: 1.Insulation gasket 2.Insulating sleeves 3.Insulating washers 4.Metal backup washers These components work together to provide complete flange isolation and sealing.
Which flange standards are supported for insulation gasket kits?
Insulation gasket kits are manufactured to suit major international standards, including: 1.ANSI / ASME B16.5 2.API 3.DIN / BS 4.MSSP They are compatible with Raised Face (RF), Full Face (FF), and RTJ flanges used globally.
What materials are used for insulation gaskets?
Insulation gaskets are made from high-performance non-metallic and composite materials such as: 1.Phenolic 2.Neoprene-faced phenolic 3.G10 / G11 glass epoxy 4.GRE (Glass Reinforced Epoxy) 5.PTFE Material selection depends on pressure, temperature, and chemical exposure.
How do I select the right insulation gasket material?
The correct insulation gasket material is selected based on: 1.Operating pressure and temperature 2.Type of fluid or chemical media 3.Flange specification and surface finish 4.Environmental conditions (onshore/offshore) For critical applications, manufacturers provide technical guidance based on service conditions.
Are flange insulation gasket kits suitable for high-pressure applications?
Yes. Insulation gasket kits made with G10 and G11 glass epoxy materials are suitable for high-pressure and high-temperature applications, commonly used in oil & gas pipelines and refineries.
What is the standard thickness of an insulation gasket?
The thickness of an insulation gasket typically ranges from 1.5 mm to 6.4 mm, depending on flange standards, pressure class, and application requirements. Custom thicknesses are also available.
What is the difference between F, E, D, and O insulation gasket kits?
Insulation gasket kits are classified based on flange coverage and design: 1.Type F (Full Face): Covers entire flange, including bolt holes 2.Type E (Raised Face): Fits inside bolt circle (most common) 3.Type D: Located inside bolt circle, cost-effective option 4.Type O (RTJ): Designed for ring-type joint flanges Each type is selected based on flange design and isolation requirements.
Can flange insulation gasket kits be customized?
Yes. Insulation gasket kits can be customized based on: 1.Flange size and standard 2.Pressure class 3.Material requirements 4.Operating conditions Custom solutions are widely used in pipeline, oil & gas, and export projects.
What is the difference between an insulation gasket and an isolation gasket?
There is no functional difference. The terms insulation gasket and isolation gasket are used interchangeably to describe gaskets that provide electrical isolation and corrosion protection in flanges.
Are insulation gasket kits used in cathodic protection systems?
Yes. Insulation gasket kits are a critical component in cathodic protection systems, where they electrically isolate pipeline sections to control corrosion and improve system efficiency.
Do you supply insulation gasket kits for international projects?
Yes. Insulation gasket kits are manufactured to meet global standards such as ANSI, API and ASME and are widely supplied to export markets including the UAE, Saudi Arabia, Qatar and other international regions.
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