FLANGE ISOLATION KITS

Description:

The insulating sets comprise of a Glass Epoxy phenolic laminate or neoprene faced phenolic laminate gasket for different types, which is located between the flange sealing faces, phenolic laminate bolt sleeves, two insulating washers per bolt for maximum protection, and two plated mild steel washers per bolt. Stainless steel washers can be supplied upon request.

Insulating sets are essentially used for pipeline flange corrosion protection, where a seal is required between dissimilar flange materials. The use of dissimilar metallic flanges with a conductive gasket material accompanied by a suitable electrolyte may set up a galvanic cell which will corrode the anodic metal. Insulating sets are also used to electrically isolate flange joints, preventing the flow of electrostatic charge along pipelines.

Type F gaskets are made to fit the raised face portion of the flange only. as there are no bolt holes in the “F” gasket. The inside diameter of the bolt hole circle is slightly smaller than the outside diameter of the gasket. ensuring an exact, automatic positioning of the gasket. Type F gaskets are available in the same materials as Type E gaskets. standard thickness of 1/8″.
Type E is a full-faced gasket with the same outside diameter as the flange and precision cut bolt holes. This design facilitates proper alignment of the gasket during installation and foreign material is prevented from shorting the flange isolation. Type E gaskets are available in plain face or Nitrile faced phenolic, as well as a variety of high temperature materials. standard thickness of 1/8″.
Type D gaskets are specifically designed to fit into the ring groove of ring-type-joint flanges. They are made of a medium-weave, fabric-reinforced phenolic material, are sized to ANSI specifications, and come in basic oval and octagonal shapes. Also available are BX gaskets with a pressure rating of up to 15,000 psi.

The VCS sealing gasket is specially designed for flange sealing and insulating in all critical services. It is suitable for raised face, flat face, and RTJ flanges in all pressure classes, even API 15,000 psi service.

Stainless Steel Core:

The SS core is SS316L. Special materials such as Duplex, Inconel, etc. can be made according to the requirements.

IFG®

Glass Reinforcement Epoxy:

Name G10 is the standard glass reinforced epoxy material, while G11 is available when higher temperatures are required.

INSULATION KITS GASKETS

                                 Gaskets Materials
 
SPECIFICATIONS PLAIN PHENOLIC NEOPRENE FACED PHENOLIC REINFORCED PTFE G-7 SILICONE GLASS G-10 EPOXY/GLASS G-11 EPOXY/GLASS
Dielectric Strength Volts/mil 500 500 350 350 550 550
Compress Strength psi 25000 25000 2300 40000 50000 50000
Water absorption % 1.6 1.6 0.01 0.07 0.1 0.1
Tensile Strength psi 20000 20000 1450 25000 45000 43000
Operating Temp oF -65~+220 -65~+175 -320~+500 -320~+450 -200~+302 -50~+392
Operating Temp oC -54~+104 -54~+79 -196~+260 -196~+232 -128~+150 -45~+202
Sealing Element Materials
 
OPERATING TEMP. NITRILE VITON PTFE NEOPRENE EPDM
oF -40~+250 -20~+350 -320~+450 -40~+250 -40~+250
oC -40~+121 -29~+177 -196~+232 -40~+121 -40~+121
 
SPECIFICATIONS G10 BONDED G11 BONDED
Dielectric Strength Volts/Mil 550 550
Compressive Strength psi 65000 50000
Water Absorption % 0.05 0.085
Flexural Strength psi 65000 60000
Tensile Strength psi 50000 45000
Operating Temp oF -200~+302 -50~+392
Operating Temp oC -128~+150 -45~+202

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