Flange Dielectric Insulation Kit (FIK) Calculator

Verify electrical isolation across dielectric insulating flange kits (gasket, bolt sleeves, and washers) to prevent cathodic protection short-circuits.

Flange & Insulation Kit Specs

Flange Class & Rating:

Number of Flange Bolts N_bolts:

Insulating Gasket Retainer Material:

Bolt Isolating Sleeve Type:

Measured Field Isolation Resistance (kΩ): Measured with megohmmeter (500V DC)

Cathodic Potential Differential ΔV (mV): Voltage across isolated joint

Isolation Verification Results

Electrical Isolation Status:

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Leakage Stray Current (I_leak):

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NACE Minimum Required Resistance:

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Isolation Quality Factor:

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Individual Bolt Short Risk:

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Cathodic Current Drainage Loss:

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Dielectric Flange Insulation Kit Principles

Flange insulation kits (FIKs) electrically isolate pipeline sections from un-protected station piping, compressor stations, and wellheads. An isolating kit consists of a dielectric gasket retainer (G-10 epoxy with spring-energized PTFE seals), full-length Mylar or G-10 bolt insulating sleeves, and dual dielectric washers under steel backup washers.

Acceptance Criteria (NACE SP0286)

Prior to bolting, individual components must exhibit resistance exceeding $100 ext{ M}Omega$. Once assembled and hydrotested, the installed flange pair must maintain a minimum in-situ isolation resistance of $> 10 ext{ k}Omega$ to prevent cathodic protection current drain into well casings or plant grounding grids.

Flange Dielectric Insulation Kit (FIK) Calculator

Flange & Insulation Kit Specs

Isolation Verification Results

Dielectric Flange Insulation Kit Principles

Acceptance Criteria (NACE SP0286)

Frequently Asked Questions