This ferritic stainless steel pipe contains, by mass %: C: 0.001% to 0.100%; Si: 0.01% to 2.00%; Mn: 0.01% to 2.00%; P: 0.001% to 0.05%; S: 0.0001% to 0.005%; Cr: 10.5% to 20.0%; Sn: 0.001% to 0.600%; Ti: 0.001% to 1.000%; Al: 0.001% to 0.100%; and N: 0.001% to 0.02%, with a balance being Fe and unavoidable impurities, the ferritic stainless steel pipe includes a pipe-end-thickened portion at a pipe end portion, and a gap distance d (μun) formed at the pipe end portion satisfies a relationship of d≥Cr.sup.2/(1000 Sn) (in the expression, Cr and Sn represent amounts (mass %) of respective elements).

An apparatus and method for reinforcing a welded-lap pipe joint includes a first pipe segment having a bell-end presenting a receptacle, a spigot-end of a second pipe segment extending into and welded to the bell-end receptacle to form a welded-lap joint, and a bell-shaped reinforcing sleeve surrounding the welded-lap joint. In exemplary embodiments the reinforcing sleeve is welded to the first or second pipe segments. Also disclosed are a method of assembling a reinforced welded-lap pipe joint.

A pipe joint has a first pipe having an end portion and a first pipe wall thickness, and a second pipe having an end portion. The end portion of the first pipe is welded to the end portion of the second pipe to seal the joint between the first pipe and the second pipe. The first pipe has an outwardly-extending, buckle-inducing deformation that is spaced apart from the pipe joint. A crest height of the deformation is 500% or less of the first pipe wall thickness.

A conduit for transporting a fluid comprises a first collar, a second collar, and a bellows. The bellows comprises a corrugated inboard ply, a corrugated outboard ply, and an interstitial space, interposed between the corrugated inboard ply and the corrugated outboard ply. The conduit additionally comprises a first weld, hermetically coupling the corrugated inboard ply and a first outer collar portion, a second weld, hermetically coupling the corrugated outboard ply and a first inner collar portion, a third weld, hermetically coupling the corrugated inboard ply and a second outer collar portion, a fourth weld, hermetically coupling the corrugated outboard ply and a second inner collar portion, and a first sensor, communicatively coupled with the interstitial space.

An assembly including a double wall PE sump and an electro-weldable penetration fitting, wherein the sump is provided with two walls identifying an interspace therebetween and wherein at least an electro-weldable penetration fitting is applied to the sump at at least a circular opening prepared for the passage through the two walls by a conduit. The penetration fitting includes a cylindrical sleeve internally defining a tubular passage and provided with a threaded portion on the outer surface of a first end, with a cylindrical portion on the opposite end, and centrally with a stop shoulder, as well as with a welding zone, having a heat transfer component, provided between the threaded portion and the stop shoulder. The penetration fitting also includes a locking ring at least provided with a smooth cylindrical portion that can be coupled with the welding zone of the cylindrical sleeve provided with the heat transfer component.

A method of fabricating a conduit comprises simultaneously corrugating three plies to form a bellows. The method also comprises simultaneously trimming a corrugated inboard ply and a first corrugated outboard ply of the bellows. The method further comprises locating a weld-through ring and a second weld-through ring between the corrugated inboard ply and the first corrugated outboard ply. The method additionally comprises forming a port and a second port through the weld-through ring and the second weld-through ring, respectively. The method also comprises communicatively coupling a sensor and a second sensor with an interstitial space, interposed between the corrugated inboard play and the first corrugated outboard ply, via the port and the second port, respectively.

A conduit (100) for transporting a fluid comprises a first collar (102), a second collar (103), a bellows (108), and a sensor (116). The bellows (108) comprises a central axis (180), a first corrugated outboard ply (114), a corrugated inboard ply (110), interposed between the first corrugated outboard ply (114) and the central axis (180), an interstitial space (126), interposed between the corrugated inboard ply (110) and the first corrugated outboard ply (114), and a second corrugated outboard ply (112) within the interstitial space (126). The corrugated inboard ply (110), the first corrugated outboard ply (114), and a weld-through ring (150) are welded to the first collar (102) and the second collar (102). The second corrugated outboard ply (112) is not hermetically coupled to the first collar (102) or the second collar (103). The sensor (116) is communicatively coupled with the interstitial space (126).

A hose assembly includes a corrugated metal tube having a plurality of corrugations and an outer cuff portion extending from an endmost one of the plurality of corrugations, radially outward of an inner diameter of the endmost corrugation, an end connection having an outer end defining a fluid connector and an inner end defining a nose portion received in the outer cuff portion of the corrugated metal tube, and a collar surrounding the outer cuff portion of the corrugated metal tube and the nose portion of the end connection. The collar, the outer cuff portion, and the nose portion are welded together.

A pipe device includes a pipe and a connection element. The pipe has a pipe jacket that has an inner surface and an outer surface and forms a flow channel. The connection element forms a through-channel that extends from a connection piece consisting of a first material (M1) and having a first opening to a second opening. The pipe jacket is positioned on the connection piece with a first pipe end consisting of a second material (M2). A bonded connection is formed between the first material (M1) and the second material (M2) in a contact region between the inner surface of the pipe jacket and a peripheral surface of the connection piece.

A conduit (100) for transporting a fluid comprises a first collar (102), a second collar (103), and a bellows (108). The bellows (108) comprises a corrugated inboard ply (110), a corrugated outboard ply (112), and an interstitial space (126), interposed between the corrugated inboard ply (110) and the corrugated outboard ply (112). The conduit additionally comprises a first weld (138), hermetically coupling the corrugated inboard ply (110) and a first outer collar portion (104), a second weld (134), hermetically coupling the corrugated outboard ply (112) and a first inner collar portion (106), a third weld (186), hermetically coupling the corrugated inboard ply (110) and a second outer collar portion (105), a fourth weld (184), hermetically coupling the corrugated outboard ply (112) and a second inner collar portion (107), and a first sensor (116), communicatively coupled with the interstitial space (126).