PSI LineSeal™ Sealing and Isolating Gasket

Description

PSI LineSeal™ Sealing and Isolating Gasket

Sealing Gaskets for Zero Fugitive Emissions & Extreme Critical Sealing Applications

LineSeal Gasket Seal and Isolator

LineSeal™ Xtreme Critical Service Gaskets are designed to withstand severe corrosive environments, including high concentrations of CO2, H2S, produced water and aggressive inhibitors even at elevated or fluctuating temperatures. The center of the gasket consists of a high integrity 316 stainless steel core for high hoop strength while a layer of G-10 reinforced laminate is applied to each side to serve as the dielectric sealing material.

Pressure activated seals, with a stainless steel spring, provides elastic memory for polymers not normally associated with this characteristic – resulting in a simple flat gasket with extremely high loading and self energizing characteristics without adverse cold flow problems.

Benefits and Features

  • Extreme, high reliability sealing and electrical isolation solution for critical service applications.
  • Seals and isolates all pressure ratings through ANSI 2500 class and API 15,000 psi service.
  • Withstands severe service conditions including vibration, temperature and pressure fluctuations.
  • Designed to withstand corrosive environments, including high concentrations of CO2, H2S, produced water and aggressive inhibitors.
  • Good electrical isolation properties for cathodic protection.
  • Pressure-activated seals provide high confidence sealing, eliminates costly leaks and provides a solution for fugitive emissions.
  • Gasket is sized to the bore to protect flange faces from media-induced corrosion and flow-induced erosion.
  • Prevents turbulent flow at flanged connections.
  • Mitigates galvanic corrosion in dissimilar metals flanges.
  • High strength laminate material resists failure due to excess compression.
  • Available to match any flange specification (ANSI, ASME, API, MSS, BS, DIN, AS, and others).
  • Can mate mismatched RTJ with raised-face flanges.
  • Easy installation, make-up and removal:
    • Sealing system is not sensitive to low bolt loads – providing reliable sealing through a range of bolt stress.
    • Gasket is self-aligning and centering – quick to install and no special tools are required.
  • Maintenance-free corrosion-resistant design is resistant to deforming under load.
  • Works in ring joint flanges, reducing fluid entrapment, flow induced erosion and media induced corrosion between flanges.

How The Seal Functions

Before Tightening
The flange faces have come into contact with the sealing elements, which extend slightly above the surface of the retainer. As the flange is tightened, the sealing elements are compressed into the machine groove – developing an initial high unit pressure against the flange faces.
Linebacker 61 Gasket Seal and Isolator
After Tightening
The flange faces come into firm contact with the retainer, thus compacting the sealing elements within grooves. At the same time, the unique LineSeal™ spring energized seal provides elastic memory for polymers not normally associated with this characteristic – resulting in a simple flat gasket with extremely high loading and self energizing characteristics without adverse cold flow problems.
Linebacker 61 Gasket Seal and Isolator

Gasket Types

Type E Gasket
The gasket retainer extends out to the O.D. of the flange. Holes are cut in a type “E” gasket at the bolt circle to accommodate threaded studs or bolts.
Linebacker 61 Gasket Type E
Type F Gasket
The gasket retainer extends out to the I.D. of the bolt circle.
Linebacker 61 Gasket Type F

Physical Properties of Retainer for Common LineSeal™ Sealing Gasket

LineSeal Gasket Seal and Isolator

ASTM Test
Method
G-10
Epoxy
Glass
D149 Dielectric Strength
Volts/Mil (Short Term)
800
D695 Compressive Strength
(psi)
69,000
D229 Water Absorption
(percent)
0.04
D257 Insulating Resistance
Meg Ohms
300,000
D790 Flexural Strength
(psi)
65,000
D256 IZOD Impact Strength
(Ft. Lbs./In.)
26
D638 Tensile Strength
(psi)
51,000
D732 Shear Strength
(psi)
21,000
Temperature Range
Cryogenic to +302°F Cryogenic to +150°C
Seal Element Temperature Range PTFE (Teflon)
Cryogenic to +450°F Cryogenic to +232°C
Seal Element Temperature Range Vitron
-20 to +350°F -29 to +177°C
LinkSeal™ Test Results Typical
TEST LinkSeal™
Value
Compression Test
EN 13555 @150®
140 Mpa Gasket Stress
Creep Relaxation
EN 13555 @150®
Leakage Test
EN 13555 @ 40 bar Helium
@5Mpa to 80 Mpa gasket stress
0.99 Relaxation Factor
Hot Blowout Test
HOBT@151®C @ 165 bar
No Blowout
Shell Leakage Test
T-2.232686 @ ambient @ 52Mpa
4.2 X 10-7 pa-m3/s/mm
Shell Cycle Test
T-2.232686 @ 150® @ 45.6Mpa
<0.10 bar pressure loss
Suggested Sealing Gasket Material Compatibility
Medium Retainer Seal Temp. Range °F Temp. Range °C
Carbon Dioxide G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
Diesel Fuel G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
Ethanol G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
Fuel Oil G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
H2S G-10 Teflon -65 to +250 -54 to +121
Gas, Natural G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
Gas, Sweet G-10
Vitron -20 to +220 -29 to +138
Gas, Sour CO2 Mix G-10 Teflon -65 to +250 -54 to +121
Jet Fuel G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
Nitrogen G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
Oil, Crude G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
Propane G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
Propylene G-10
Vitron -20 to +80 -29 to +27
Sewage G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
Water (Hot) G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
Water (Sea) G-10 Teflon -65 to +250 -54 to +121
Vitron -20 to +280 -29 to +138
General Notes:
The foregoing performance data are intended as guidelines only.
Performance suitability for any specific applications should be determined by the user.
Variation in temperature, pressure, concentration or mixtures acting
synergistically may preclude suggested service use.
Material selection is at the sole risk of the user.
Consult with a specialist or PSI factory for specific applications.
PSI’s responsibilities will be limited to those listed
in the PSI standard warranties.

LineSeal Gasket Seal and Isolator

How to Order

To order LineSeal™ Sealing/Isolating Gaskets please indicate the following:

  1. Quantity
  2. Nominal Pipe Size
  3. Pressure Rating
  4. Gasket Type: E or F
  5. Gasket Style: LineSeal™
  6. Retainer Material
  7. Sealing Element
  8. Weld neck or slip-on application
  9. Note all special requirements.

Warranty

Manufacturer’s warranty statement will be supplied upon request to Allied Corrosion Industries, Inc.

Typical Specifications

All Critical Service Applications

Materials for sealing gaskets on pipes containing water, aqueous fluids, oil, sour or natural gas (up to 302®F, 150®C) shall consist of the following components:
Isolating and Sealing Gasket
One isolating and sealing gasket, LineSeal Type “F”, 0.27 inch thick, 316 stainless steel core retainer laminated on both sides with a G-10 fiber glass reinforced laminate containing a precision tapered groove to accommodate the controlled compression of a PTFE(Teflon) spring energized seal. Sealing element placement shall accommodate either flat, raised or RTJ face flanges. The spring energized seal shall be pressure energized. The G-10 retainer shall have a 800 volts/mil dielectric strength and a minimum 69,000 psi compressive strength. The I.D. of the flange isolating gasket shall match the bore of the flange in which it is installed.

Quality

Gaskets shall be manufactured at a facility that has a registered ISO 9001:2008 Quality Management System.

Submittals shall include copy of valid registration. Performance suitability and material compatibility shall be determined by the user.

Availability

Gaskets shall be manufactured by PSI-Pipeline Seal and Insulator, Inc., Houston, Texas, U.S.A.
Telephone: 713-747-6948
Facsimile: 713-747-6029
www.pipelineseal.com.
e-mail: info@psipsi.com
Alternate products should be submitted to an engineer 10 days prior to bid due date.

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