Flange Isolation

Pikotek Flange isolation kits effectively complete the electrical insulation of a pipeline flanged joint and seal the two flange faces.


Pikotek Flange Insulation Kits are designed to work in conjunction with insulating gaskets (Pikotek VCS, VCFS, PGE and RC) to effect the complete electrical insulation of a flanged assembly.

The Insulation Kits consist of one full-length insulating sleeve, two insulating washers and two steel washers for each of the bolts in the flange assembly. The purpose of the insulating sleeves is to electrically separate the bolts from each side of the flange, while the insulating washers provide electrical insulation for each of the nuts attached to the bolts. This method of insulation provides the user with a high-reliability solution to complete the electrical insulation of a flanged joint.

Pikotek insulating kits/sets are designed to be used with our specialty line of high-strength, high reliability insulating gaskets and are available for use in all types of flanges including raised-face, flat-face and RTJ. The gaskets and kits are sized according to the relevant flange specification including ANSI, API, DIN, BS,AS, MSSP, etc.

  • Flange insulation kits designed for the rigors of oil field applications.
  • Full-length sleeves designed to fit inside of washers and seal out moisture.
  • GRE washers made of high compressive strength material for added reliability.
  • GRE sleeves available for guaranteed reliability even if mishandled.
  • Double washer kits provide added assurance for electrical insulation.
  • No phenolic or polypropylene materials used.
  • Metal washers are either high-strength, zinc-plated carbon steel or stainless steel.
  • Manufactured to compliment the legendary Pikotek line of insulating gaskets.
  • Available for any flange type and/or specification (i.e., ANSI, API, DIN, etc.)


Iinsulating washers made from GRE material, which has a compressive strength of 60,000 psi. Other less expensive materials such as phenolic, Minlon or polypropylene are subject to crushing, cracking, breaking and thread pinch which can compromise product integrity.

Two standard insulating sleeve options: GRE (Glass-Reinforced Epoxy) and Mylar. If required, other materials can be made available by special request.

The GRE sleeves are the best solution for all around reliability. The material is extremely strong and can withstand significantly more abuse and harsh conditions than any other sleeve material available. GRE offers excellent resistance to crushing, cracking, breaking and thread pinch. For the ultimate in reliability and assurance of continued electrical insulation, GRE is the best selection for most every industrial application.

Pikotek only offers insulating washers that are made from GRE. These washers must withstand the full compressive force of the nuts when the flange is made up or electrical insulation will be lost. Pikotek GRE washers have a compressive strength of 60,000 psi.

Steel washers are needed to prevent the twisting action of the nuts from scarring or gouging the insulating washers. Pikotek's standard insulating kit uses high-strength, zinc plated 1050 steel washers, which have excellent corrosion resistance and mechanical strength.

For special situations, other steel washer types such as stainless steel or Teflon coated carbon steel are available.

Insulating Washers

  • GRE (standard)
    1/8" (0.125") thick Glass-Reinforced Epoxy washers cut to standard SAE washer dimensions. Compressive strength = 60,000 psi.

Steel Washer Options

  • ZPS (standard)
    1/8" (0.125") thick zinc-plated 1050 Steel washers cut to standard SAE washer dimensions.

  • SS
    1/8" (0.125") thick 316 Stainless Steel washers cut to standard SAE washer dimensions.

  • Teflon Coated
    1/8" (0.125") thick zinc-plated 1050 Steel washers coated with Teflon cut to standard SAE washer dimensions.