Flange Insulation Kit ASME B16.5,Flange Isolating Gasket Kits

our Insulation kits are available up to 24 inches for ASME B16.5 generally, but higher nominal sizes can be manufactured if needed.

Flange insulation kits for cathodic protection are one of our specialties,Flange isolation kits have a proven track record for being one of the most effective and reliable products for controlling and maintaining the integrity of piping and tank systems under demanding conditions.

Flange Insulation kits can be  used in the petrochemical, oil refinery, offshore seawater environments, where the transfer of volatile fluids through the pipeline can create explosive conditions which could be ignited by stray electrical currents.

Even where there is no risk of explosion these Insulation Kits are still used to act as a non-conductive interface between the two mating flanges to reduce the potential threat of galvanic corrosion of the pipework in cathodic protection systems.

A typical flange Insulation Kit including below parts

• 1 Insulating Flange Gasket
• 1 Insulating Sleeve per bolt
• 2 Insulating Washers per bolt
• 2 Steel Washers per bolt

Materials available for Insulation kits 

Metallic Core
The metallic core of gasket is made of stainless steel 316L. 
Other metals, including Duplex and Inconel are available upon request.

Isolating Material 
1) G-10 Glass-Reinforced Epoxy (GRE) laminate:
Compressive Strength: 65,000 PSI 
Dielectric Strength: 750-800 VPM 
Max. Continuous Operating Temp: 300 degrees F (150 degrees C) 
Water Absorption: .05% 
Flexural Strength: 65,000 PSI 
Tensile Strength: 50,000 PSI 

2) G-11 Glass-Reinforced Epoxy (GRE) High Temp. laminate material:
Compressive Strength: 50,000 PSI 
Dielectric Strength: 500 VPM 
Max. Continuous Operating Temp: 398 degrees F (200 degrees C) 
Water Absorption: .085% 
Flexural Strength: 57,700 PSI 
Tensile Strength: 41,000 PSI 

Seal Material

PTFE (Spring-Energized)

Viton

Buna-Nitrile

Isolating Sleeve

GRE

Mylar

NOMEX 

Isolating Washers

GRE – G10/G11

HCS Washers

Steel Washer

ZPS 

XPS

Stainless Steel Washers

Packing Details