EVOLUTION® Isolation Gaskets

PRODUCT TYPE: Flange Isolation-Pikotek

EVOLUTION® Isolation Gasket - The Future of Flange Isolation. The Most Chemically Resistant Isolation Gasket.

Chemically Resistant

The fully encapsulated EVOLUTION® gasket provides impermeable resistance to chemicals, including H2S, steam, and CO2.

As the quest for more oil and gas continues, we drill deeper and farther than ever before. By going deeper and farther, our pipelines are experiencing higher temperatures and pressures.  Add to this the use of steam and carbon dioxide to extract greater amounts of oil and gas from a well and it has now become challenging for traditional isolation kits to keep up with the increasing demands being placed on them. While glass reinforced epoxy (GRE) based isolation products are typically rated to 302F/150C or 392F/200C, EVOLUTION is rated to 500F/260C with mica sleeves and washers and is extremely chemical and steam resistant.

Avoid Expensive Exotic Cores

EVOLUTION's coating (a GPT proprietary material) is extremely abrasion and impact resistant while providing chemical resistance to H2S, steam, CO, CO2 and other chemicals often found in oil and gas pipelines. This fully encapsulated coating also prevents the need for expensive exotic cores, as it eliminates contact to exposed metal.

Redefining the Isolation Gasket

This innovative gasket is coated using a GPT proprietary material designed specifically for the oil and gas industry that is extremely abrasion and impact resistant. The coating is also chemically resistant to attack from HS, steam, CO, CO, and other chemicals found in oil and gas pipelines.

EVOLUTION® has passed API 6FB fire testing in multiple sizes and pressure classes and has a considerable increase in operating temperature over GRE products. Furthermore, EVOLUTION® does not have the permeation issues or chemical attack that plagues GRE gaskets.

Under harsh conditions, gaskets made from GRE may be vulnerable to chemical attack, blowout, thermal attack, hydrolysis and emissions —all of which can have serious consequences. EVOLUTION® is different. Its revolutionary materials and design provides industry-leading resistance to leakage and flange corrosion, as well as unprecedented levels of fire safety.

Unlike GRE gaskets, which are prone to delamination, EVOLUTION® has no laminations and as a result can better withstand high-pressure environments.

Rated to 500°F (260°C)*, EVOLUTION® can also operate under high temperatures. Tested comprehensively for safety, the product has API 6FB, 3rd Edition Fire Test recognition.

* When used with Mica sleeves and washers.

Features and Benefits

316L Stainless Steel Core

  • Only three millimeters (1/8 inch) thick
  • Thinner profile helps make installation easier and more accurate

Proprietary Coating

  • High dielectric strength
  • Eliminates expensive exotic cores due to the fully encapsulated coating
  • Rated to 500°F (260°C)

*For higher temperature applications, please order MICA sleeves and MICA washers.

Inconel 718 C-Ring

  • Fire safe - provides the added security of knowing that the gasket has passed the API 6FB, 3rd Edition Fire Test in multiple sizes/classes
  • High pressure - extremely high pressure capability


  • Resistant to typical oil and gas chemicals, in particular HS, CO, & CO
  • Impermeable seal and encapsulated carrier eliminates the need to replace gaskets following hydro-testing
  • Larger than the pipe bore so that under compression it matches the pipe bore


  • The handle found on the EVOLUTION® allows each gasket to be holiday tested during manufacturing to insure strong isolation performance in the field
  • Helps ensure accurate alignment during installation
  • Provides traceability and identification for the product



  • Fire-safe flange insulation in conjunction with cathodic protection
  • Insulation between dissimilar metals to prevent galvanic corrosion
  • Wellhead isolation from inter-connected flow lines
  • Valve connections
  • Christmas Tree connections
  • Pump connections
  • Compressor connections
  • Mating mismatched ring-joint to raised-face flanges (EVOLUTION® will seal in ring-joint, raised-face and flat face/slip-on flanges)
  • Eliminate fluid trap corrosion between ring-joint (RTJ) flanges where high concentrations of CO2, H2S and other aggressive hydrocarbon media are present
  • Eliminate turbulence and flow-induced erosion between ring-joint (RTJ) flanges.
  • To seal between flanges subjected to vibration/cavitation (i.e., compressor stations).
  • For slip-on flanges and coated flanges, please contact GPT engineering



Gasket Properties*             

Carrier: 316L stainless steel core                                          

Color:     Dark Tan with black handle                


                Fluid Services: Oil and Gas                  

                Maximum Operating Temperature (°F/°C): 500°F/260°C**

                Minimum Operating Temperature: (minus): -60°F/-51°C

                Maximum Pressure Class: ASME 2,500#/API 5,000


Typical Physical Properties*   




Water Absorption (%):


ASTM D570 / D229

Taber Abrasion:


Mass Loss

Taber Abrasion: 


Taber Wear Index

Compression Test:

180 MPa  

EN 13555 @ 260° C

Creep Relaxation:


EN 13555 @ 260° C

Leakage Test:

1.0x10^-7 mg/m/s

EN 13555 @ 40 bar Helium @ 135 Mpa gasket stress)

Hot Blowout Test:

 No blowout  

HOBT @ 260° C @ 62.3 bar

Dielectric Strength: 

 1100 Volts/ Mil  

ASTM D149 (Short Time)

Tensile Strength Gasket:

70,000 psi 


Tensile Strength Dielectric Material:

24,000 psi


Salt Spray Test: 

2000 hours - No Visible Effect


Shell Leakage Test:

6.48x10^-12 PA-m^3/s/mm Tightness Class A

MESC SPE 85/300-3.3.2 @ ambient @ 81.9 MPa (gasket stress) @ 51 bar (test pressure)

Shell Leakage Test:

3.08x10^-8 PA-m^3/s/mm Tightness Class B

MESC SPE 85/300-3.3.2 @ 260°C @ 81.9 MPa (gasket stress) @ 42 bar (test pressure)

Shell Leakage Test:

<0.1 bar (pressure drop)

MESC SPE 85/300-3.3.2 @ 260°C @ 81.9 MPa (gasket stress) @ <0.1 bar (pressure drop)

Thermal Properties*

Coefficient of Linear Thermal Expansion (thickness tested .125”) X-axis / Y-axis: 10.0 / 13.0  (IPC-TM 650-2.4.24)                                    

  • Flammability Rating: Fire retardant   
  • Fire Testing: Passed per API 6FB       


This is a general guide and should not be the sole means of selecting or rejecting this material.

* Higher classes available upon request

** Temperature rating when using Mica sleeves/washers

All isolation products are affected by exposure to heat and moisture where electrical isolation is concerned. 
Please note that field values may vary from test values due to exposure to one or both of these environmental factors.