Isolation kits

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Among the products supplied by Flexilatina de Colombia, are the Insulation Kits used for cathodic protection, corrosion prevention in flanges, prevention of abrasion problems and of course as static sealing gaskets.

The Insulation Kits are composed of the following elements:

  • Packing
  • Insulating bushings: These are insulating tubes of thin wall thickness, manufactured in insulating materials such as phenolic resin or G 1. Their basic function is to insulate the bolts of the flange support points.
  • Insulating washers: These are 3 mm thick washers in insulating materials with high compressive strength, generally manufactured in phenolic resin or G 10. Their main function is to electrically isolate the flange from the nut or metallic washer.
  • Metallic washers: 3 mm thick galvanized carbon steel metallic washers sized according to ASTM F436.
  • Supplementary washers: 3 mm thick washers made of materials such as non-asbestos fibers that have lower compressive strength than washers made of insulating materials. Their main function is to protect mechanically avoiding internal cracking or breakage of the insulating washer due to overstressing or excessive torques at the time of assembly.

Types of gaskets for insulation kits:

Type F, E y D

Type F gaskets are designed to be installed between flanges with raised faces (RF). Their outside diameter is slightly smaller than the inside diameter of the bolt hole circle through which the studs pass.

Type E gaskets are designed to be installed between flanges with flat faces (FF) and/or raised faces (RF). This assembly reduces the possibility of ingress of foreign bodies that can be electrical conductors, since they completely isolate the two flange faces.

Type D gaskets (Ring joint) are designed to be installed between RTJ flanges, they are manufactured in G 10 in oval or octagonal format.

We handle different types of gaskets for electrical insulation kits:

  • Flexisoft gaskets: Manufactured with aramid fibers and high quality mineral fibers mixed in a NBR rubber matrix. The sheets used to manufacture these gaskets are certified in dielectric strength according to ASTM D 149-09 by the Industrial Electrical Testing Laboratory of the National University of Colombia. Additionally, it has excellent sealing properties, allowing the use of a single material in both applications (static sealing/electrical insulation).
  • Flexiphenol gaskets: They are widely used for insulation kits due to their static sealing and electrical insulation properties for any type of flanges. The gasket is made of 3 mm (1/8″) thick phenolic resin with two sealing elements in viton nitrile or expanded Teflon®, one on each side of the gasket.
  • Flexiagra gaskets: They are considered an effective method of static sealing and electrical insulation for any type of flanges. These gaskets are made of 3 mm (1/8″) thick G 10 with two sealing elements in viton nitrile or expanded Teflon®, one on each side of the gasket.
  • Dinagra gaskets: They are considered one of the most effective methods for static sealing and electrical isolation, are manufactured to be installed in non-critical services and are designed for electrical isolation in flanges and general sealing applications. They are excellent for insulating flanges made of dissimilar metals by preventing galvanic couple, or for corrosion prevention with cathodic protection. They are typically manufactured in 1/4″ (6.35 mm) or thicker G 10 as insulator and two energized Teflon® o-rings as sealing element, one on each face of the gasket.
  • Defender gaskets (VCS): Manufactured by Lamons, the world’s leading manufacturer and marketer of static sealing, clamping and electrical insulation products. The DEFENDER sealing/insulating gasketing system is designed for very critical applications, manufactured with a 316L stainless steel core bonded to two G 10 fiberglass reinforced epoxy resin discs. The DEFENDER gasket is resistant to deformation under load and is used when electrical insulation and corrosion control is required in pipelines containing gas, natural gas, oils and other hydrocarbons, and can operate at a maximum temperature of 392°F (200°C).
    Available for Full Face, Raised Face and RTJ flanges in 1/2″ to 48″ diameters, manufactured to fit ASME Class 150, 300, 400, 600, 900, 1500 and 2500, API 2K, 3K, 5K and 10K and DIN PN 20-PN420 flanges, DEFENDER gaskets are an engineered solution designed for trouble-free operation that eliminates costly leaks and provides a solution for fugitive emissions. Manufactured with an innovative, industry-first Press-n-LockTM ” Glue_Less Seal & Groove Technology” combines an energized spring-loaded, pressure-activated seal with a unique groove that retains the sealing element without the use of glue on key mating surfaces.
  • Ring Joint (Phenol or G-10): Type D gaskets are oval or octagonal rings made of materials such as G-10 or phenol, they are installed on RTJ flanges. Their two main functions are to achieve static sealing and to electrically isolate the flanged joint. BX formats are also manufactured for pressures up to 15000 psi. The maximum service temperature is 150°C.

All our cathodic protection insulation kits come with double metal washers, double insulating washers, insulating bushings and when necessary, supplementary double washers.

We have a large stock of all the materials used in the manufacture of electrical insulation kits, which makes us leaders in the distribution of this line nationwide. We handle excellent delivery times and we have highly qualified personnel that will advise you correctly in the selection and assembly of our insulation kits for cathodic protection.

Isolation kits

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