Dielectric Flange Kits Insulation Isolation Kits for Flanges Phenolic and Pikotek Gaskets

author: Qishine Industry

2023-05-16

Dielectric flange kits—also called flange insulation and isolation kits—keep flanges electrically separated while sealing the joint. A typical kit pairs a dielectric gasket (such as phenolic or Pikotek) with a sleeve or spacer that blocks current between the mating surfaces. This article explains how to choose a kit, why isolation matters, and the phenolic and Pikotek gasket options available.

One-Minute Overview

Dielectric flange kits insulate and isolate flanges while sealing the joint.
A kit pairs a dielectric gasket (phenolic or Pikotek) with a sleeve or spacer.
Choose by material, flange size, connection type, and seal type.
They improve safety, efficiency, and lower maintenance cost.

Dielectric Flange Kits: Insulation and Isolation

Dielectric flange kits, also called flange insulation and isolation kits, keep two flanges electrically separated while holding a tight seal. A typical kit includes a dielectric gasket—often a phenolic or Pikotek type—plus a sleeve, spacer, or washer that blocks current between the mating surfaces. They are used in piping where stray current or cathodic-protection systems could otherwise cause corrosion or shock.

How to Choose the Right Dielectric Flange Kit

Selecting the right kit takes a few key factors into account:

Material

Dielectric flanges come in materials such as stainless steel, aluminum, and plastic. Each has its own properties, so pick the one that suits the service—stainless for strength and corrosion resistance, plastic where weight or non-sparking matters.

Flange Dimensions

Kits span a wide range of sizes. Match the kit to the flange and the pipe or component it connects, so the gasket and sleeve fit without trimming.

Connection Type

Dielectric flanges use threaded or slip-on connections. Threaded suits larger diameters; slip-on is common on smaller bore pipe. Choose the type that matches the existing joint.

Seal Type

A flat or raised-face seal can be used. Pick the seal profile from the application and the pressure the flange will see.

Benefits of Insulating and Isolating Flanges

Insulating and isolating flanges with a dielectric kit is essential for safe, reliable piping. The kits bring three clear benefits.

They raise safety by building a barrier between flange and pipe that blocks current flow, cutting shock and other electrical hazards.

They raise efficiency by limiting heat lost through the joint, so the system runs more effectively.

They cut maintenance by protecting against corrosion and damage, reducing inspection and repair work.

Phenolic and Pikotek Gaskets

These gaskets are the sealing heart of a flange insulation kit. They form a tight joint and stop fluid or gas escape. Knowing the types helps you pick the right one.

Phenolic Gaskets

Phenolic gaskets are made from phenolic resin with paper or cotton fiber. They seal well at low pressure and resist most chemicals, oils, and solvents. They come in many shapes and can be cut to fit.

Pikotek Gaskets

Pikotek gaskets are made from a mix of rubber and metal. They seal at high pressure and resist most chemicals, oils, and solvents. Like phenolic, they are available in many shapes and can be cut to fit.

Choose phenolic for low-pressure duty and Pikotek for high-pressure duty; also weigh flange size, shape, and the media the gasket will see.

FAQ

What is a dielectric flange kit?

A set of parts that insulate and isolate flanges—usually a dielectric gasket (phenolic or Pikotek) with a sleeve or spacer that blocks current between the flanges and keeps them aligned.

What is the gasket and sleeve in a dielectric kit?

The gasket and sleeve stop electrical current passing between the flanges, while the spacer keeps the flanges correctly aligned.

What are phenolic gaskets used for?

Phenolic gaskets seal low-pressure flange joints and resist most chemicals, oils, and solvents; they are cut to fit many flange shapes.

When should Pikotek gaskets be chosen over phenolic?

Pick Pikotek for high-pressure service, where its rubber-and-metal build holds a reliable seal; phenolic suits low-pressure duty.

Dielectric Flange Kit Flange Isolating Gasket Kits Types of Flange Gaskets

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