Flange Insulation Sets

Insulation sets are used to limit corrosion in pipeline systems. Where dissimilar metals are present, the sets remove the possibility of the system acting as a galvanic cell and reduce the risk of galvanic corrosion of the pipe work. Insulation sets are also used to isolate cathodically protected piping systems where they prevent the flow of electrostatic charge.

Each flange insulation set comprises one central flat or oval section gasket, plus one insulation sleeve, two insulating and two plated steel washers per bolt. The sets are individually packed and clearly labelled with the flange rating, size, type and material combination.

Category:

Description

Key function of insulating gaskets:

  • Used to electrically isolate sections of pipe work
  • Designed to minimise electro-chemical erosion
  • Comprising materials with high dielectric strength
  • Manufactured to suit flanged joints to ASME, BS, DIN and customer designs

Style E – Full face gasket insulating set assembly

Style E

Suitable for flat and raised face flanges. This style minimises the ingress of conductive foreign matter and reduces the risk of bridging.

Typically used on oil and hydrocarbons where flange insulation is a requirement. Manufactured from materials with high dielectric strength to ensure minimum electrical contact between flanges

Style F – Inside bolt locating gaskets insulating set assembly

Style E

Utilises a RF gasket which centrally locates within the bolts Typically used on oil and hydrocarbon where flange insulation is a requirement. Manufactured from materials with high dielectric strength to ensure minimum electrical contact between flanges

Style D – Ring Joint Gasket

Style D

Reinforced phenolic ring type joint gasket. Available with a choice of insulating sleeves and washers: Unless otherwise specified Reinforced phenolic will be supplied. Other materials on request. Care must be taken during installation of this gasket so that it is not overstressed during bolt up.

High Pressure Spring Energised PTFE Insulation Gasket

High Pressure Spring Energised PTFE Insulation Gasket

This gasket is a high reliability gasket used for both insulating and general sealing purposes in a very critical services. The gasket is suitable in all services up to and including ANSI 2500# and API 15,000# classes. The gasket is manufactured from a machined metallic core with high-strength glass-fibre reinforced epoxy resin insulating faces.

Supplied with high-strength G10 insulating washers and sleeving to resist the forces present in high pressure applications and zinc-plated carbon steel washers to spread the load across the insulating washers during installation.

Spring-energised  PTFE or Viton sealing elements are available Corrosion resistant metallic core. Also available with high-temperature faces manufactured from G-11 epoxy resin.

Also available in style VCFS which is fire safe according to API 6FB.

Based on the VCS design and is manufactured with a stainless steel core with glass fibre reinforced epoxy facings with a spring energised PTFE seal.

The VCSF gasket features an additional Fire safe coated E ring. VCFS can be used on both raised face and  RTJ flanges.

Technical Specifications for Klinger manufactured Insulating gaskets sets

Component 1 2 3 4 5 6
Dielectric Strength 1 kV/mm 19.8 7.8 5.5 16.6 5.87* 13.9*
Water Absorption % 1.6 1.0 1.0 10.6 0.5 0.5
Max. Operating Temp. °C 107 107 107 400 260 260
  1. Test according to ASTM D149 in transformer oil. To convert from kV/mm to V/mil multiply by 25.4. *Test according to ASTM D149 in air.
  2. Recommended maximum temperature in air for electrical isolation purposes.

Component Material

1 Type E and F Flat Gasket 3.2mm thick neoprene faced phenolic

2 Insulating Washer 3.2mm thick reinforced phenolic

3 Insulating Sleeve 0.8mm thick phenolic

4 Type E and F Flat Gasket 3.0mm thick KLINGERSIL®C-4430. Rated fire safe

5 Type E and F Flat Gasket 3.0mm thick KLIGER®top-chem 2000. Rated fire safe

6 Type E and F Flat Gasket 3.0mm thick KLINGER®top-chem 2003.