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Address:  PO Box 91327,  Lafayette, LA 70509  USA

Phone: 337-886-3161

Fax: 337-886-3167

Email: sales@drakespec.com

Flange Isolation Gasket Kits

Flange Isolation Gasket Kits are designed to maintain the integrity and reliability of the pipeline and piping system through safety and corrosion protection. Flange Isolation Gasket Kits provide an effective seal and electrical isolation of flanges. By eliminating metal to metal to metal contact, static current is halted to prevent corrosion and aid in the cathodic protection of the pipe.

Type E Full Face Flange Insulation Gasket Kit Installation Diagram from Drake Specialties

Constructed of high quality materials that have a high dielectric constant and low water absorption, our Flange Isolation Gasket Kits are available for all size flanges, ranging from 1/2" to 144" in all ANSI and API classes

Type F Raised Face Flange Insulation Gasket Kit installation diagram from Drake Specialties

In addition, utilizing Flange Band Protectors in conjunction with flange insulation kits further enhances reliability and reduces risk. Drake flange protectors seal the flange internals to prevent foreign objects or debris from lodging between the flanges, forming a bridge, creating a short, and compromising the entire cathodic protection system.


Gasket Kit Types

Type F Gasket Kit

type F flange Gasket kit imageType F "Raised Face" gaskets will fit only on the raised face surface of the flanges. The outside diameter of an F style gasket is slightly less than the inside diameter of the bolt circle. F type gaskets can be used on both raised face and full face flanges. It is recommended that the flanges be wrapped with Flange Band Protectors available from Drake Specialties or a similar device to prevent foreign material from collecting and creating a bridge, thus shorting out the cathodic isolation. Type F gaskets are available in phenolic, neoprene-faced phenolic, and high temperature materials.

Type E Gasket Kit

type E flange Gasket kit imageOur Type E "Full Face" Gasket style kit contains a full-face gasket that has the same outside diameter as the flanges. This style of gasket will prevent foreign material from collecting and creating a bridge in the flange which would short out the cathodic isolation. Type E gaskets are available in phenolic, neoprene-faced phenolic, and high temperature materials.

Type O Gasket Kit

Type O Gasket kit imageType O Gaskets have a sealing element on each side of the gasket and are available in both Type E and Type F styles. The sealing element materials are Nitrile, Viton, or Teflon®. Type O Gaskets are made of both phenolic and G-10 materials.

Type D Gasket Kit

type D flange Gasket kit imageType D gaskets are designed to fit into the ring groove of RTJ (ring type joints) flanges. We also offer BX gaskets. Both are available in grade CE phenolic.


Ordering the correct Flange Isolation Gasket Kit requires knowing the specifications and type of service for your particular application.

Questions to ask include:

  • Type of gasket material required or type of service
  • Flange face type (such as raised face, full face, etc)
  • Nominal Pipe Size
  • ANSI pressure rating of the flange
  • Service Temperature

 

Some commonly requested specifications of our isolation gasket, sleeve, and washer materials are listed below:

 

Gasket Specifications Chart

GASKET MATERIAL DIELECTRIC STRENGTH WATER ABSORPTION COMPRESSIVE STRENGTH MAXIMUM TEMPERATURE Fahrenheit - Celsius
PLAIN FACED PHENOLIC 500 VPM 1.5% 25,000 PSI 225 107
NEOPRENE FACED PHENOLIC 500 VPM 1.5% 25.000 PSI 175 79
G-10 500 VPM .10% 50,000 PSI 285 141
Special & High Temperature materials are available upon request.

 

Sleeve Specifications Chart

SLEEVE MATERIAL DIELECTRIC STRENGTH WATER ABSORPTION MAXIMUM TEMPERATURE
Fahrenheit - Celsius
MYLAR 4000 VPM .8% 300 149
INTEGRAL MINLON 450 VPM .22% 250 121
POLYETHYLENE 400 VPM .01% 105 41
PHENOLIC 400 VPM 2% 250 121
G-10 550 VPM .10% 285 141
NOMEX 400 VPM N/A 425 218

 

Washers Specifications Chart

WASHER MATERIAL DIELECTRIC STRENGTH WATER ABSORPTION COMPRESSIVE STRENGTH MAXIMUM TEMPERATURE Fahrenheit -Celsius
PHENOLIC 400 VPM 2% 25,000 PSI 250 1021
G-10 550 VPM .10% 50,000 PSI 285 141
Special & High Temperature materials are available upon request.


Packaging:

All of our Flange Isolation Gasket Kits are packaged so that the washers are separate from the actual gasket in order to prevent damsge to the gasket itself.

To View, Download, or Print our Flange Isolation Gasket Brochure , click here.