Type "E" Gaskets extend to the outside diameter of the flange. They feature precision located bolt holes, to automatically center the gasket, and offer maximum protection against foreign material "shorting-out" the flange.

Type "E" gaskets may be ordered in any one of the following configurations:

LineBacker® Sealing Gaskets

GasketSeal® Sealing Gaskets

Neoprene Faced Phenolic Gaskets

Plain Phenolic Gaskets

Red Devil Gaskets

Yellow Jacket Gaskets

Garlock Gaskets

When configured as a LineBacker® sealing gasket, the sealing element may be positioned anywhere between the I.D. of the gasket and I.D. of the bolt circle.

Type "F" Gaskets are made to fit within the bolt hole circle of the flange. The O.D. of the gasket extends out to the I.D. of the bolt hole circle for good protection against foreign material "shorting-out" the flange. When configured as a LineBacker® sealing gasket, the sealing element may be positioned anywhere between the I.D. and O.D. of the gasket. Type "F" gaskets may be ordered in any one of the following configurations:

LineBacker® Sealing Gaskets

GasketSeal® Sealing Gaskets

Neoprene Faced Phenolic Gaskets

Plain Phenolic Gaskets

Red Devil Gaskets

Yellow Jacket Gaskets

Garlock Gaskets

Teflon® Gaskets

When configured as a LineBacker® sealing gasket, the sealing element may be positioned anywhere between the I.D. of the gasket and I.D. of the bolt circle.

Type "D" Gaskets

Type "D" Gaskets are available for RTJ flanges but the LineBacker® sealing gasket is an excellent alternative to "D" gaskets because the sealing element may be positioned anywhere between the I.D. of the gasket and I.D. of the ring groove.

GasketSeal sealing gaskets are considered one of the most effective methods for sealing and isolating flanges of all types. The gasket consists of two molded semi "O" rings (with precise crown-to-void ratio) mounted in grooves on opposite sides of an isolating retainer. While maintaining all the advantages of a full "O" ring seal, the semi "O" ring seal eliminates the need for a sealing groove in the flange face to reduce problems associated with alignment. GasketSeal sealing gaskets incorporate near zero "m" and "y" factors that make it possible to effect a positive seal without tremendous bolt loads required with flat gaskets. GasketSeal sealing gaskets are available in a wide variety of retainer and sealing element combinations for matching gaskets to service and environmental conditions. Refer to the chart for the GasketSeal sealing gasket temperature ranges and material compatibilities. More information: PSI GasketSeal Sealing Gaskets

LineBacker sealing gaskets utilize a patented rectangular sealing element, referred to as a "quad" ring, in combination with a unique groove design to effectively seal and isolate flanges of all types. With the unique "quad" ring design, elastic memory is provided for elastomers not normally associated with this characteristic. Materials such as polyimide, TFE (Teflon) and vinyl may therefore be used as sealing elements. which dramatically increases the options available for matching gasket materials to service and environmental conditions. This greater variety of materials also provides excellent temperature and chemical range compatibility. LineBacker sealing gaskets incorporate near zero "m" and 'y" factors that make it possible to effect a positive seal without tremendous bolt loads that are required with flat gaskets. Refer to the chart for LineBacker sealing gasket temperature range and material compatibilities. More information: PSI PSI LineBacker Flange Sealing Gaskets and PSI LineBacker™ Zero, 250 & 251 Sealing Gaskets

Neoprene Faced Phenolic

Neoprene Faced Phenolic gaskets have been used as standard "flat" isolating gaskets in the oil and gas industries for many years. Soft neoprene rubber sheets are factory applied to both sides of a laminated phenolic retainer providing an effective sealing surface. The temperature limit of these gaskets is approximately +175° F (80°C). Note: Due to improved sealing characteristics and retainer / seal element options, LineBacker or GasketSeal sealing gaskets should be considered in lieu of neoprene faced phenolic gaskets whenever possible.

Flat Gaskets

Flat Gaskets are used in special applications such as elevated temperatures that often require materials such as Red Devil or Yellow Jacket. Please contact Corrosion Control Products Company for additional information on available options.

Medium	Retainer	Seal	Sleeve	Washer	Temp. Range °F	Temp. Range °C
Acetone	Phenolic	EPDM	Mylar	Phenolic	+32 to +80	0 to +27
Air	G-10	Nitrile	Mylar	Phenolic	-65 to +225	-54 to +107
Ammonia, dry	G-10	Teflon	Mylar	G-10	-65 to +220	-54 to +104
Ammonia, wet***	G-10	Teflon	Mylar	G-10	+32 to +100	0 to +38
Bleach	G-10	Teflon	Mylar	G-10	+32 to +80	0 to +27
Butylene (butidiene)	G-10	Teflon	G-10	G-10	+32 to +100	0 to +38
Carbon dioxide	G-10	Nitrile	Mylar	G-10	+32 to +150	0 to +66
Caustic soda (NaOH)	Consult Corrosion Control Products Company
Cryogenic	G-10	Teflon	G-10	G-10	-300 to +280	-184 to +138
Ethanol	G-10	Nitrile	Mylar	G-10	+32 to +100	0 to +38
Ethylene (ethene)	G-10	Teflon	G-10	G-10	+32 to +80	0 to +27
Fuel Oil	G-10	Viton	Mylar	G-10	-20 to +280	-29 to +138
Gas, natural	Phenolic	Nitrile	Mylar	Phenolic	-65 to +220	-54 to +104
Gas, sour	Phenolic	Viton	Mylar	Phenolic	-20 to +220	-29 to +104
Gasoline	G-10	Teflon	Mylar	G-10	-65 to +225	-54 to +107
Hydrogen	G-10	Nitrile	Mylar	G-10	-65 to +250	-54 to +121
Jet fuel	G-10	Viton	Mylar	G-10	-20 to +225	-29 to +107
LNG	G-11	Teflon	G-10	G-10	-300 to +100	-184 to +38
Mercaptan	G-10	Teflon	G-10	G-10	-20 to +80	-29 to +27
Methanol	G-10	Teflon	Mylar	G-10	+32 to +100	0 to +38
MTBE	G-10	Special Nitrile	G-10	G-10	+32 to +80	0 to +27
Nitrogen	Phenolic	Nitrile	Mylar	Phenolic	-65 to +220	-54 to +104
Oil, crude	G-10	Viton	Mylar	G-10	-20 to +280	-29 to +138
Oxygen**	G-10	Teflon	G-10	G-10	-65 to +250	-54 to +121
Pentane	G-10	Teflon	G-10	G-10	+32 to +80	0 to +27
Propane	G-10	Nitrile or Teflon	G-10	G-10	+32 to +80	0 to +27
Propylene	G-10	Viton	G-10	G-10	+32 to +80	0 to +27
Sewage	G-10	Viton	Myla	G-10	-20 to +280	-29 to +138
Spent liquor	G-10	Teflon	G-10	G-10	+32 to +100	0 to +38
Steam*	Consult Corrosion Control Products Company
Styrene	G-10	Teflon	G-10	G-10	+32 to +80	0 to +27
Sulfur, molten	G-10	Teflon	G-10	G-10	+32 to +280	0 to +138
Toluene	G-10	Viton or Teflon	G-10	G-10	+32 to +150	0 to +66
Water, hot	G-10	Nitrile	Mylar	G-10	+175 to +250	+79 to +121
Water, potable	G-10	Nitrile	Mylar	G-10 or Phenolic	+32 to +250	0 to +121
Water, sea	G-10	Nitrile	Mylar	G-10 or Phenolic	+32 to +250	0 to +121
White liquor	G-10	Teflon	G-10	G-10	+80 to +280	+27 to +138

These are organic materials that will feed a fire if a leak occurs and an ignition source exists.
Ammonia (wet) - Data to +100°F (+38°C) only (same materials as dry).

For pipe diameters over 24" or ANSI Class pressure ratings of 600# or greater, use G-10 sleeves and G-10 washers where temperatures and other conditions permit.

General Note:
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 Corrosion Control Products Company for specific applications. PSI's responsibilities will be limited to those listed in the PSI standard warranties.

Also see PSI Flange Isolation Kits and PSI Isolating Sleeves & Washers.

For all Flange Isolation Kit sizes, specify the following:

For Flange Isolation Kits over 24", also specify:

Quantity Nominal Pipe Size ANSI Class 150# 300# 400# 600# 900# 1500# 2500# Gasket Type E = With Bolt Holes F = Ring (No Bolt Holes) D = For RTJ Flanges Gasket Style GS = GasketSeal LB = LineBacker NP = Neoprene Faced Phenolic PP = Plain Phenolic RD = Red Devil YJ = Yellow Jacket GL = Garlock TF = Teflon Retainer Phenolic G-3 G-7 G-10 G-11 Seal Element Neoprene Nitrile Viton EPDM Teflon (LB only) Washers SW = Single Washers DW = Double Washers Washer Material 1 PC = 1 Piece Acetal Phen = Phenolic G-3 G-7 G-10 G-11 Sleeve Poly = Polyethylene Mylar Nomex Phenolic G-7 G-10 G-11 Gasket I.D. Flange Type W = Weld Neck S = Slip On R = RTJ BX = API BX RX = API RX O = Other (denote Specs and Table)

Flange I.D. Flange O.D. Flange Thickness Number of Bolts Bolt Diameter Bolt Hole Diameter Bolt Circle Diameter Sleeve Length Pipe I.D. Steel Sleeve I.D. (for concrete pipe) Product In Line AWWA Class & Table (or other similar standard)