Herein a tubular element (2) is disclosed. The tubular element comprises a first tubular portion (4) comprising a first metal or alloy and a second tubular portion (6) comprising a second metal or alloy. At least a portion of an interface (9) between the first and second tubular portions (4, 6) extends within a fixed diameter range along a longitudinal direction (L) of the tubular element. The second tubular portion (6) comprises a first end portion (8) arranged around the first tubular portion (4). The second tubular portion (6) comprises a sealing surface (10) extending circumferentially around the second tubular portion (6) at the first end portion (8).

A head adapter for a fire sprinkler includes a body defining a volume. The body includes an open first end that couples with a fluid supply line and provide fluid communication between the supply pipe and the volume of the body and an open second end that provides provide fluid communication between the volume of the body and the fire sprinkler. The second end includes a gasket. The body also includes a cap coupled with the second end of the body such that the gasket is disposed between the cap and the volume. The cap couples the body with the fire sprinkler to provide fluid communication between the fluid supply line and the fire sprinkler. The volume of the body is shaped such that fluid from the fluid supply line is directed to the fire sprinkler.

A method of fabricating a conduit comprises steps of attaching a first tubular-outboard-ply-end of a tubular outboard ply to a first inner collar portion of a first collar with a second weld and attaching a second tubular-outboard-ply end of the tubular outboard ply to a second inner collar portion of a second collar with a fourth weld. The method also comprises steps of inserting a tubular inboard ply into the tubular outboard ply, threadably interconnecting the first inner collar portion and a first outer collar portion of the first collar, and threadably interconnecting the second inner collar portion and a second outer collar portion of the second collar. The method further comprises steps of attaching a corrugated inboard ply to the first outer collar portion with a first weld and attaching a corrugated inboard ply to the second outer collar portion with a third weld.

A hose assembly includes a metal hose, an end connection having a distal end defining a fluid connector and a proximal end defining a tube stub received in a distal end portion of the hose, and a weld collar surrounding the distal end portion of the hose and the tube stub of the end connection, with the weld collar, the hose distal end portion, and the tube stub being welded together at a welding zone proximal to a distal edge of the metal hose.

Disclosed herein is a piping system for an air conditioner, in which a refrigerant pipe being an air conditioning piping of a vehicle and a flange member are each made of a plastic material, and the refrigerant pipe and the flange member can be connected by laser fusing. That is, the present disclosure provides the piping system for an air conditioner, in which the refrigerant pipe and the flange member are each made of a plastic material having a vibration insulation effect and are connected by laser fusing which can prevent damage so that an effect of weight reduction and vibration insulation can be provided and a pressure loss of a refrigerant fluid can be minimized by maintaining a diameter of the refrigerant pipe to be constant with respect to an overall length of the refrigerant pipe.

Installation fittings for use in a domestic water supply pipe system of a predetermined application class. The installation fittings have a composite structure including a housing manufactured from low end synthetic polymer material. The housing has at least one pipe end with a pipe tang fitted with a tubular socket manufactured from high end material. Suitable high end materials include high end synthetic polymers or metals.

Disclosed is a liquid line improved in terms of effective producibility with a high level of process reliability and quality assurance, said liquid line comprising at least one corrugated hose and at least one connection piece for connecting the liquid line to a further component, wherein the corrugated hose and the connection piece are produced from plastic and are connected to one another via at least one welded connection, wherein the welded connection is produced by means of a laser welding process, wherein the welded connection is tight at least up to a defined operating pressure in the liquid line and wherein a stop is formed in the connection piece and defines an axial end position of the corrugated hose in 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).

Herein a tubular element (2) is disclosed. The tubular element comprises a first tubular portion (4) comprising a first metal or alloy and a second tubular portion (6) comprising a second metal or alloy. At least a portion of an interface (9) between the first and second tubular portions (4, 6) extends within a fixed diameter range along a longitudinal direction (L) of the tubular element. The second tubular portion (6) comprises a first end portion (8) arranged around the first tubular portion (4). The second tubular portion (6) comprises a sealing surface (10) extending circumferentially around the second tubular portion (6) at the first end portion (8).

An assembly includes at least one member having first and second ends. A dual metal adapter for connecting to the at least one member includes an inner tube for receiving and contacting the first end of the at least one member and being formed from a first metal having a first resistivity. An outer tube extends over the inner tube and is secured thereto. The outer tube is formed from a second metal having a second resistivity greater than the first resistivity. The first end of the at least one member is metallurgically bonded to the inner tube.