NEW

The importance of backup rings to O rings

Backup rings are ultimately used to help stop o ring migration, and they achieve this in both static and dynamic fluid power applications as the pressure cycles occur, preventing the extrusion of an o ring in the gap.  Ultimately a backup ring is a rigid ring that...

Gasket manufacturing process explained

Specialist Sealing Products have been providing high-quality gaskets to customers throughout the UK for many years. We pride ourselves in the range of gaskets we have available, suitable for a variety of applications across a range of industries.  Rubber gaskets are...

Designing seals for the food industry

There’s a number of factors to take into consideration when designing seals for the food industry. That’s because seals used within this sector need to work exceptionally hard in all food processing environments where hygiene and health and safety are of the utmost...

Storing your gaskets!

A strange headline for a gasket article, we know.  However, it’s an important area and one, which in this sector is often overlooked.  When we think about most products or items in and around our homes and business, we will recognise that most come with manufacturing...

Flange Gasket materials – What you need to know

Getting the most out of flange gasket materials and ensuring the performance of the gasket is not affected when you come to use it, means several things must be taken into consideration.  For example, factors such as their design, how they’re manufactured, installed,...

Spiral Wound Gaskets and Sheet Gaskets

Gaskets come in a range of different shapes and sizes.  All are offering similar functionality; gaskets are produced using a range of different materials to suit a range and a variety of environmental factors, industrial uses, and product requirements.  When it comes...

Benefits of Kammprofile Gaskets

Used to prevent leakage, gaskets are constructed to fit between a range of different sizes and types of surfaces in order to provide the perfect seal.  Typically used in pipes and heat exchangers, gaskets are widely used as industrial sealants.  Kammprofile gaskets,...

Purpose of a Kammprofile Gasket

The ultimate purpose of a gasket is to stop leaks while being able to deal with varying levels of compression.  When it comes to Kammprofile gaskets, these are ideal for standard pipeline and heat exchanger applications.  As due to their grooved metalcore, with a...

Are your gaskets completely compliant?

In industries where gaskets are not just important but essential, there are numerous challenges to be faced and considerations to take on board.  This is especially true when it comes to making sure this “essential” element is also compliant.  With the implementation...

Everything you need to know about Manway Gaskets

When it comes to manway gaskets, we want to keep things simple, introducing them as the small sealing ring found in hatches/openings that are constructed for large tanks. Openings which give people access to the inside of the aforementioned tanks and vessels. The...

FLANGE INSULATION KITS

Flange Insulation Sets are used in the petrochemical, oil refinery, offshore seawater environments, where the transfer of volatile fluids through the pipeline can create explosive conditions which could be ignited by stray electrical currents.

Even where there is no risk of explosion these Insulation Kits are still used to act as a non-conductive interface between the two mating flanges to reduce the potential threat of galvanic corrosion of the pipework in cathodic protection systems.

A typical flange Insulation Kit comprises ;

  • 1 Insulating Flange Gasket
  • 1 Insulating Sleeve per bolt
  • 2 Insulating Washers per bolt
  • 2 Steel Washers per bolt

In order to achieve optimum results it is essential that Flange Insulation Kits follow certain design criteria;

The electrical resistance properties of the components are balanced for the purpose and location in the insulation system.

The components are manufactured from insulation materials with high compressive strength and good stability.

Flange Insulation Set

Applications Include

  • Long distance pipelines for Oil, Water and Gas
  • Offshore Installations
  • Oil Refinery Pipelines
  • Petrochemical Industry

General Properties 

  • Electrical Insulation of pipework 
  • Cathodic Protection 
  • Designed to minimise electro-chemical erosion 
  • The kits are produced using materials with high compressive strength  
  • The electrical resistance properties are balanced  

Types Available 

There are 4 main Types of Flange Insulation Kit, available in a wide range of materials to meet varying service conditions.  

Each Type consists of the same 4 elements but the central Flange Gasket differs 

    The gasket in a Type D Kit

    Type D

    The gasket in a Type D Kit is specifically designed to fit into the ring groove of RTJ (ring-type-joint) flanges 

    Flange Insulation Type E

    Type E

    The gasket in a Type E Kit is Full Face having the same outside diameter as the flange with precision cut holes allowing the bolts to ‘slide through’. This Full face gasket reduces the risk of electrical bridging and the presence of foreign matter between the mating flanges 

    The gasket in a Type F

    Type F

    The gasket in a Type F Kit is suitable for raised face flanges. It is an IBC gasket which sits inside the bolt circle of the flange. This type is not as efficient as the type E but is far easier to install as separation of the mating flanges is not necessary.  

    The gasket in a Type G Kit

    Type G

    The gasket in a Type G Kit is available in both the Full Face or IBC versions and incorporates an elastomeric sealing ring in the gasket faces. With the correct choice of insulating materials Type G Kits are capable of greater chemical and temperature resistance 

    Available Materials  

    Standard Flange Insulation Kit

    Standard

    Our standard Flange Insulation Kit consists of ;  

    • Neoprene Faced Phenolic Central Gasket – The Neoprene facing providing an effective sealing surface with the phenolic core providing the necessary electrical isolation. 
    • Mylar Bolt sleeves 
    • Reinforced Phenolic Washers 
    • Zinc Plated Carbon Steel Washers 

    Application Guidelines 

    • Basic pipeline flange isolation in oil, gas and other processing applications 
    • Can be used on the majority of flange specifications including ASME, API, EN, BS and DIN 
    • Flange insulation and electrical isolation in conjunction with cathodic protection 
    • To isolate flange and piping systems where dissimilar metals are present 
    • Temperature Range :  -20⁰ C to +100⁰ C 
    Type G-10 gaskets

    In addition to the above we also have available a wide range of additional materials that can be used for Very Critical Service Applications. These kits contain a precision designed and manufactured central gasket seal with the appropriate sleeve and washer isolating materials.  

    Type G-10 

    The G-10 gasket consists of a modified u-shaped TFM seal energised with a phynox spring bonded to a high strength G10 glass reinforced epoxy and 316L stainless steel composite core, offering extremely high levels of electrical isolation from cryogenic temperature up to +150⁰ C 

    Each Kit includes; 

    • G-10 Gasket 
    • G-10 Bolt Sleeves 
    • G-10 Washers 
    • 316 SS Back-up washers 

    Application Guidelines 

    • Flange isolation for critical applications in the oil, gas and other processing applications 
    • Media compatibility with Natural Gas, Oils, other Hydrocarbon media and many corrosive environments 
    • Specified for plant wide use on the majority of flange specifications including ASME, API, EN, BS and DIN 
    • Flange insulation and electrical isolation in conjunction with cathodic protection 
    • Insulation between dissimilar metals to prevent galvanic corrosion 
    • The position of the TFM spring energised seal allows the gasket to be used across all types of flange styles including ring joint and raised face flanges 
    • Temperature Range :  –150⁰ C to +150⁰ C 
    Type G-11  gaskets

    Type G11

    Following the same highly effective design as the G-10 type but using a G-11 GRE composite material that extends usage to higher temperatures. 

    This G-11 gaskets consists of a modified u-shaped TFM seal energised with a phynox spring. This TFM material was chosen for its advanced mechanical properties and improved resistance to permeation. This seal is bonded to a high strength G-11 glass reinforced epoxy and 316L stainless steel composite core 

    Each Kit includes; 

    • G-11 Gasket 
    • G-11 Bolt Sleeves 
    • G-11 Washers 
    • 316 SS Back-up washers 

    Application Guidelines 

    • Flange isolation for critical applications in the oil, gas and other processing applications 
    • Media compatibility with Natural Gas, Oils, other Hydrocarbon media and many corrosive environments 
    • Specified for plant wide use on the majority of flange specifications including ASME, API, EN, BS and DIN 
    • Flange insulation and electrical isolation in conjunction with cathodic protection 
    • Insulation between dissimilar metals to prevent galvanic corrosion 
    • The position of the TFM spring energised seal allows the gasket to be used across all types of flange styles including ring joint and raised face flanges 
    • Temperature Range :  –150⁰ C to +150⁰ C 
    Premium Type FS gasket

    Type FS 

    This is a premium performance fire safe isolation gasket utilising a triple seal design which incorporates a coated metallic core housing a modified u-shaped TFM seal energised with a phynox spring . On both the inside and outside of this seal are two kammprofile sections, the inner faced with modified PTFE, the outer with a proprietary high temperature material. G11 GRE material is used to face the outer section of the metallic core. 

    Each Kit includes; 

    • FS Gasket 
    • G11 Bolt Sleeves 
    • Isolating washers in modified high temperature material 
    • 316 SS Back-up washers 

    Application Guidelines 

    • The FS kit combines exceptional chemical compatibility and electrical isolation with the capability of maintaining sealing performance after API 6FB 3rd Edition fire test 
    • Flange isolation for critical applications in the oil, gas and other processing applications 
    • Media compatibility with Natural Gas, Oils, other Hydrocarbon media and many corrosive environments 
    • Specified for plant wide use on the majority of flange specifications including ASME, API, EN, BS and DIN 
    • Flange insulation and electrical isolation in conjunction with cathodic protection 
    • Insulation between dissimilar metals to prevent galvanic corrosion 
    • The location of the triple seal design elements on the gasket face allows the gasket to be used across all types of flange styles including ring joint and raised face flanges 
    • Temperature Range :  -45⁰ C to +180⁰ C 
    The GRE gasket set

    Type GRE

    The GRE gasket consists of a G10 glass reinforced carrier with 2 modified PTFE sealing faces 

    Proprietary machining of the carrier allows correct location of the sealing faces, with the depth / profile designed to achieve correct compression and groove fill. 

    Each Kit includes; 

    • GRE Gasket 
    • G10 Bolt Sleeves 
    • G-10 Washers 
    • Zinc Plated Carbon Steel or 316 SS Back-up washers 

    Application Guidelines 

    • Specified for plant wide use on the majority of flange specifications including ASME, API, EN, BS and DIN 
    • Flange insulation and electrical isolation in conjunction with cathodic protection 
    • Insulation between dissimilar metals to prevent galvanic corrosion 
    • Temperature Range :  –128⁰ C to +120⁰ C 
    Contact Us
    close slider

    Your Details

    Let us know how to get back to you.


    How can we help?

    Feel free to ask a question or simply leave a message.