Installation Guide: GORE® Gasket Tape Series 500

United States

GORE Gasket Tape Series 500 can be installed in four quick & easy steps.


Quick & Easy Installation

This video demonstrates how to do the skive cut and how to apply the tape around a flange. There is no need to worry about perfection, since the gasket is very conformable.

For raised face and flat face flanges

1. Select the size

Gasket Width (bD)

For raised face and flat face flanges

Select the gasket width that provides the following coverage:

  • EN- or JIS-standard flanges: 30-50% of flange face width.
  • ASME-standard flanges: 50-75% of flange face width.
  • Non-standard flanges: Calculate the gasket width to ensure sufficient gasket stress.

For tongue and groove flange

  • The entire width of the groove should be covered by the gasket.
  • Ensure that the tongue is slightly taller than the groove depth.

For divider bars in heat exchangers

  • The gasket width should cover the entire divider bar width.

ATTENTION: Perform an engineering torque estimation to confirm a gasket stress higher than the following can be achieved:

 • 3 mm (1/8"): 19 MPa (2,755 psi)
 • 6 mm (1/4"): 23 MPa (3,335 psi)

Gasket Thickness

  • Most applications require one layer of 3 mm (1/8") gasket tape.
  • Conversely for flanges with deviations > 1 mm (0.040"), the 6 mm (1/4") gasket tape is recommended.
  • Should the flanges show irregularities of more than 2 mm (0,080"), a shimming with overlaps can be used. In such cases consult a Gore associate.

2. Determine a Torque Value

To achieve a reliable seal, adequate gasket stress must be applied during installation.

Typical minimum stress to seal values for GORE® Gasket Tape Series 500 are:

  • 3 mm (1/8"): 19 MPa (2,755 psi)
  • 6 mm (1/4"): 23 MPa (3,335 psi)

Perform an engineering calculation to determine the torque value for your specific application. Industry guidance is available, for example in ASME PCC-1 Guidelines for Pressure Boundary Bolted Flange Joint Assembly, and EN 1591-1 Flanges and their Joints - Design Rules for Gasketed Circular Flange Connections - Part 1: Calculation.


3. Install the Gasket Tape

GORE Gasket Tape Series 500 can be installed in four quick & easy steps.Included below are detailed general installation steps as well as application specific guidance, including videos (raised face & flat face flanges, tongue and groove flanges, heat exchanger and rectangular flanges).

A. Prepare the Flange

  • Open the flanges a minimum of 15 cm (6").
  • Completely clean the surface to ensure optimal adhesion.
  • Remove all oil, graphite, and other residue.
Perform Initial Skive Cut

B. Perform Initial Skive Cut

  • Unwind about 0.5 m (1.5 ft) of gasket tape. Cut the end with a sharp knife on a clean, firm surface using the skiving technique.
  • The length of the skive cut, ls, should match the dimension in the table below:
    Tape Thickness Skive cut length (ls)
    3 mm (1/8") 15 - 20 mm (3/4")
    6 mm (1/4") 25 - 40 mm (1-1/4")

ATTENTION: It is critical that the skive runs out smoothly, avoiding any step. Be sure to use proper protective gloves when using a knife.

Apply Gasket Tape

C. Apply Gasket Tape

  • Position the skived end of the gasket tape near the designated starting bolt.
  • Remove the adhesive backing a little at a time, to prevent the adhesive strip from picking up dirt.

ATTENTION: No additional anti-adhesives spray or liquid should be applied to the flange surfaces. In cold conditions, gently warm the gasket tape before installation.

Complete the Layer of Gasket Tape

D. Complete the Layer of Gasket Tape

  • Complete the gasket by laying the tape over the skived end, extending beyond ~14 mm (1/2"). To prepare for the second and final skive cut, identify and mark the starting and end points.
  • Cut away the gasket material at an angle, so that the maximum height, h, matches the dimension in the table provided.
  • For large flanges, multiple joints may be required. Joints should be placed at a bolt hole and as far from one-another as possible (~180° apart for 2 joints, and 120° apart for 3 joints).
Tape Thickness (t) Skive cut length (ls) Maximum height (h)
3 mm (1/8") 15 - 20 mm (3/4") 3.5 - 5.0 mm (3/16")
6 mm (1/4") 25 - 40 mm (1-1/4") 6.5 - 9.0 mm (3/8")

 

Installation instructions

Application specific guidance:

Raised Face & Flat Face Flanges

Raised Face or Flat Face Flanges

  • Follow steps A through D of the General Installation Procedure (listed above) to install the gasket tape.
  • The adhesive strip allows for overhead gasket installation.
  • When closing the flange ensure the gasket tape remains in position.
  • Completed seal with GORE Gasket Tape Series 500.

GORE Gasket Tape Series 500

Please contact Gore for additional recommendation.

Tongue and Groove Flanges

On the Tongue

  • Follow steps A through D of the General Installation Procedure (listed above) to install the gasket tape.
  • The adhesive strip allows for overhead gasket installation.
  • When closing the flange ensure the gasket tape remains in position.

In the Groove

  • Follow steps A through C of the General Installation Procedure (listed above) to prepare and begin laying the gasket tape within the groove.
  • To complete the gasket described in step D, lay the last 30 cm (1 ft) of the gasket tape in the groove, and mark the location of the starting skive cut using a ball point pen.
  • Perform the closing skive cut on a flat surface.
  • Complete the gasket by removing the rest of the adhesive backing, laying the gasket in the groove, and overlapping the skived cuts.

Heat Exchangers - Around the Tube Bundle

  • Follow steps A through D of the General Installation Procedure (listed above) to install the gasket tape.
  • The adhesive strip allows for vertical gasket installation.
  • When closing the flange ensure the gasket tape remains in position.

Heat Exchangers - In the Groove

  • Follow steps A through C of the General Installation Procedure (listed above) to prepare and begin laying the gasket tape within the groove.
  • To complete the gasket described in step D below, lay the last 30 cm (1 ft) of the gasket tape in the groove, and mark the location of the starting skive cut using a ball point pen.
  • Perform the closing skive cut on a flat surface.
  • Complete the gasket by removing the rest of the adhesive backing, laying the gasket in the groove, and overlapping the skived cuts.

Heat Exchangers - Across the Divider Bar

Heat Exchangers - Across the Divider Bar
  • Prepare the Flange. Completely clean the surface to ensure optimal adhesion. Remove all oil, graphite, and other residue.
  • Measure and cut the gasket tape so the length is slightly oversized by 3 mm (1/8"). Perform a 90° butt cut at both ends.
  • Apply divider bar gasket
  • Remove the adhesive backing and firmly press the end of the gasket into the outer gasket. Lay the tape across the divider bar and firmly press the other end into the outer gasket.

ATTENTION: Divider bars in Heat Exchangers rarely operate at significant differential pressures, therefore, a butt cut pressed firmly into the outer flange gasket will provide an adequate and successful seal. Gore does not recommend any alternative cutting techniques or overlapping at the divider bar and circular gasket interface.

Rectangular Flanges

Rectangular Flanges
  • Follow steps A through C of the General Installation Procedure (listed above) to prepare and begin laying the gasket tape.
  • Turn sharp corners.
    • In order to ensure uniform stress to seal, GORE® Gasket Tape Series 500 should be notched at sharp corners.
    • When approaching a sharp corner, cut away an 80–90° notch from the inner edge of the tape as shown.
    • Bend the gasket around the corner. It is then held in place by the adhesive backing.
  • Complete the gasket by following step D of the General Installation Procedure (listed above).

 


4. Review and Follow Standard Bolted Flange Assembly Practices

GORE® Gasketing Products do not require special assembly practices. However, ulitizing Industry Best Practices is always recommended when assembling a bolted flanged joint. Such practices have been developed by ASME, European Sealing Association (ESA), the Fluid Sealing Association (FSA) and the Association of German Engineers (VDI).

  • ESA / FSA Gasket Installation Procedures Assuring Joint Integrity and Maximum Safety
  • ASME PCC-1 Guidelines for Pressure Boundary Bolted Flange Joint Assembly
  • VDI 2200 - Tight flange connections: Selection, calculation, design and assembly of bolted flange connections
  • ASME also offers training classes on bolted flange joint assembly
  • Multiple organizations also offer EN 1591-4 specified training content for bolted flange joint assembly.

Step-by-Step Instructions

Ensure the sealing surfaces are clean, dry, and free of grease.

Ensure the sealing surfaces are clean, dry, and free of grease.

Position the gasket so that it is centered on the flange.

Position the gasket so that it is centered on the flange (use the bolts as a guide).

Lubricate the fasteners well. Be sure to lubricate all load bearing surfaces on the bolts, nuts, and washers.

Lubricate the fasteners well. Be sure to lubricate all load bearing surfaces on the bolts, nuts, and washers.

Assemble bolts, washers and nuts on the flange.

Assemble bolts, washers and nuts on the flange.

Finger-tighten the bolts, moving in a circular direction.

Finger-tighten the bolts, moving in a circular direction.

Utilize a calibrated torque device to torque each bolt in a star pattern sequence.

Utilize a calibrated torque device to torque each bolt in a star pattern sequence. Apply the torque in three passes:

  • 1st Pass: 30% of Target Torque
  • 2nd Pass: 60% of Target Torque
  • 3rd Pass: 100% of Target Torque
Apply the torque at 100% of Target Torque in a circular pass.

Apply the torque at 100% of Target Torque in a circular pass. Then wait 4 hours.

Complete the installation by performing circular passes until all bolts have acheived the target torque.

Complete the installation by performing circular passes until all bolts have acheived the target torque.

FOR INDUSTRIAL USE ONLY

Not for use in food, drug, cosmetic or medical device manufacturing, processing, or packaging operations.