The present invention relates to a tube comprising polytetrafluoroethylene, and an object of the present invention is to provide a tube having an appropriate tensile strength and flexibility and being excellent internal insertion property. The object can he achieved by a tube comprising polytetralluoroethylene according to the present invention, in which, in a case where a surface shape of an inner surface of the tube is measured, when a direction of the measurement is parallel to a longitudinal direction of the tube and the measurement is performed in a forward direction and a reverse direction, a variation rate between a size of a periodic step measured in the forward direction and a size of the periodic step measured in the reverse direction is 5% or more.

A process for producing a thermoplastic composite pipe, where the process includes: a) providing a tubular liner having a wall containing a thermoplastic polymer A in the region of the outer surface; b) providing a tape containing reinforcing fibres in a matrix containing a thermoplastic polymer B, where polymer A and polymer B are different; c) applying a film or a composite which is produced in d) and is composed of a film and a tape provided in step b) to the tubular liner, with melting of the outer surface of the liner and of the contact surface of the film either beforehand, simultaneously or thereafter, d) applying the tape provided in b) to the outer surface of the film, with melting of the outer surface of the film applied and of the contact surface of the tape either beforehand, simultaneously or thereafter,
where the surface of the film which is brought into contact with the liner contains a moulding compound containing polymer A to an extent of at least 30% by weight, and the opposite surface of the film contains a moulding compound containing polymer B to an extent of at least 30% by weight.

Methods and apparatus are disclosed. The apparatus includes a substantially cylindrical mount body comprising a first open mouth at a first end of the cylindrical body and a further open mouth at a remaining end of the cylindrical body, a substantially cylindrical inner surface, and an outer surface that includes a plurality of spaced apart substantially parallel recessed regions that extends circumferentially around the body, wherein the cylindrical body is tapered at each end and at least one securing element is located between the recessed regions.

Methods and apparatus are disclosed. The apparatus includes a substantially cylindrical mount body comprising a first open mouth at a first end of the cylindrical body and a further open mouth at a remaining end of the cylindrical body, a substantially cylindrical inner surface, and an outer surface that includes a plurality of spaced apart substantially parallel recessed regions that extends circumferentially around the body, wherein the cylindrical body is tapered at each end and at least one securing element is located between the recessed regions.

The present invention relates to a flexible armoured pipe having a centre axis and including an internal pressure sheath and an outer sheath, where the radial distance between the internal pressure sheath and the outer sheath defines an annulus. The annulus includes at least one tensile armour layer surrounded by at least one retaining layer constituted by an elongate metallic strip wound around the at least one tensile armour with a winding angle of at least 65° in respect of the centre axis.

The present invention relates to a flexible armoured pipe having a centre axis and including an internal pressure sheath and an outer sheath, where the radial distance between the internal pressure sheath and the outer sheath defines an annulus. The annulus includes at least one tensile armour layer surrounded by at least one retaining layer constituted by an elongate metallic strip wound around the at least one tensile armour with a winding angle of at least 65° in respect of the centre axis.

A vacuum-insulated line (200) has an inner and an outer corrugated hose (101, 102) which are separated from one another by an evacuated intermediate space (103). One of the corrugated hoses is encased with a wound hose (201). The wound hose (201) prevents the line (200) from becoming elongated when it is charged with pressure during the transport of a medium. The wound hose (201) furthermore protects the line against external mechanical loads or damage. The wound hose simultaneously protects the corrugated hoses against excessive bending.

A vacuum-insulated line (200) has an inner and an outer corrugated hose (101, 102) which are separated from one another by an evacuated intermediate space (103). One of the corrugated hoses is encased with a wound hose (201). The wound hose (201) prevents the line (200) from becoming elongated when it is charged with pressure during the transport of a medium. The wound hose (201) furthermore protects the line against external mechanical loads or damage. The wound hose simultaneously protects the corrugated hoses against excessive bending.

A high frequency chest wall oscillation (HFCWO) system for applying HFCWO therapy to a torso of a patient may include an air pulse generator that may be configured to generate air pulses, a garment that may be configured to be worn by a patient, and at least one hose that may be configured to deliver air pulses from the air pulse generator to the garment.

A high frequency chest wall oscillation (HFCWO) system for applying HFCWO therapy to a torso of a patient may include an air pulse generator that may be configured to generate air pulses, a garment that may be configured to be worn by a patient, and at least one hose that may be configured to deliver air pulses from the air pulse generator to the garment.