A gasket that is capable of withstanding high compressive cads, protecting a flange joint from galvanic corrosion, and preventing fluids from leaking through a flange joint when the flange joint is exposed to extreme heat.

A non-metallic flange isolation gasket kit sealing flanged pipeline connections and flanged vessel connections while providing electrical isolation protection between flanges suited for high-pressure and high-temperature cathodic protection applications is presented. The invention protects flange faces from media induced corrosion and mitigates flange rotation induced fatigue and failures. The invention comprises of a retainer, a seal, and a seal pre-load structural ring. The seal pre-load structural ring is inserted into the seal, and seal outer diameter surface is joined to the retainer inner diameter surface. A second embodiment comprises of a composite gasket blank, comprising of a retainer and a seal, and a seal pre-load structural ring. The seal outer diameter surface and the retainer inner diameter surface are joined by thermal fusion bonding. The invention may further comprise one or more gasket seating stress stabilizers and/or a centering ring. Tapered retainer upper and lower surfaces decrease flange rotation.

According to an embodiment, an aircraft comprises a fuselage including composite skin; an enclosure located inside the fuselage; a rechargeable battery disposed inside the enclosure; and a ventilation conduit extending from the enclosure to an opening in the composite skin, the ventilation conduit including: a first portion having a first end coupled to the enclosure and a second end spaced from the composite skin, and a second portion extending between the composite skin and the second end of the first portion, the second portion comprising an electrically non-conductive material.

A dielectric fitting for a pressure regulator includes a flange adapted to be disposed next to a housing of the pressure regulator, an isolator plate disposed next to the flange and adapted to be disposed between the flange and the housing, and an isolator cover disposed between the flange and the isolator plate to electrically isolate the flange from the housing.

A method electrically separates two fluid lines across a structural boundary. Fluid is transported between a first channel through a first fluid line and a second channel through a second fluid line across the structural boundary formed by a structure. The first channel and the second channel are connected by a channel formed by a fitting. The fitting is comprised of a first component, a second component, and an isolator. The first fluid line and the second fluid line are electrically separated using the isolator in the fitting.

A method and apparatus for reducing an intensity of an electrical discharge that occurs within a fluid transport system in an aerospace vehicle. In one illustrative embodiment, an apparatus includes a transport member. The transport member is configured for use in the fluid transport system. The transport member includes a material configured to reduce voltages and currents, induced in response to an electromagnetic event, along the transport member.

An electrically isolating duct-connecting block for connecting two ducts, the duct-connecting block including a rigid, generally rectangular duct-like structure having upper and lower walls and side walls that match a cross-sectional size of a tie duct, the structure being made of an electrically nonconductive material. The block also includes a plurality of threaded fasteners embedded within the structure. Also disclosed is an electrically isolating nozzle-mounting block for mounting a nozzle to a tie duct, the nozzle-mounting block comprising a rigid flange-like structure having peripheral mounting holes and a central circular passage for conveying air to the nozzle, the structure being made of an electrically nonconductive material. The block also includes a plurality of threaded fasteners partially embedded within the structure. The blocks may be made of ultrahigh molecular weight polyethylene or any electrically and mechanically equivalent material.

The present disclosure provides a pipe coupling that includes a coupling body, a first pack joint nut, and first and second sleeves. The coupling body is made of a first metal material and the first pack joint nut is made of a second metal material. The first pack joint nut is configured to receive a portion of a first pipe. The pipe is made of a dissimilar metal material to the first and second metal materials of the coupling body and the first pack joint nut, respectively. The first sleeve is configured to line at least a portion of an inner periphery of the coupling body. The second sleeve is configured to line at least a portion of an inner periphery of the first pack joint nut. The first and second sleeves are made of non-metallic materials, and serve as physical non-metallic barriers between the first/second metal materials of the coupling/first pack joint nut, and the dissimilar metal material of the first pipe.

An electrically isolating gasket is disclosed wherein a coating layer is disposed on at least one conductive surface, and in some embodiments, on all surfaces or at least all of the conductive surfaces. The electrically isolating gasket includes a core gasket component, a ring seal component, and a non-conductive inner seal component. The coating layer can be, for example, polyimide, polyamide, ceramic, and aluminum oxide.

A dielectric fitting for a pressure regulator includes a flange adapted to be disposed next to a housing of the pressure regulator, an isolator plate disposed next to the flange and adapted to be disposed between the flange and the housing, and an isolator cover disposed between the flange and the isolator plate to electrically isolate the flange from the housing.