A method of improving the life expectancy of piping has steps of determining a circumferential position in the piping having a highest expected rate of wall thickness reduction; determining a circumferential section of a pipe length having a greatest wall thickness; and installing the pipe length in the piping by rotating the pipe length to align the circumferential section of the pipe length having the greatest wall thickness with the circumferential position of the piping having the highest expected rate of wall thickness reduction.

A method for producing a tubular member from a metal sheet may include applying an adhesive layer to at least one joining section of at least two associated joining sections of the metal sheet, forming the metal sheet into a tubular member such that the at least two associated joining sections may be arranged on one another, and heating the adhesive layer by rolling a first roll over the metal sheet.

A tube arrangement for the transport of temperature control medium, comprising a base body (2) made of polymeric material and produced by means of blow molding, wherein at least one functional element (3) is arranged in the base body (2), which element is in operative connection with the temperature control medium.

A water delivery pipe made from PVC or PVCO and having an inner surface which is rifled. The inner surface of the pipe preferably includes a graphene material. The pipe has improved anti-bacterial properties such that the formation of bacterial biofilms is eliminated or reduced.

Methods of making the pipe are also disclosed.

A fire-rated exhaust duct system comprising a modular configuration or structure. The fire-rated exhaust duct system comprises a plurality of exhaust duct sections. Each of the exhaust duct sections is configured to be joined or connected with other exhaust duct sections in the field or at an installation site, e.g. in building housing a kitchen facility or a laboratory facility to form longer sections or runs for exhaust duct system.

A method of manufacturing a reinforced pipe (7) comprising: wrapping a pipe (1) in reinforcing tape (2) to form a wrapped pipe having an outer circumference consisting of a first circumferential portion (4) and a second circumferential portion (6); and passing the first circumferential portion (4) over one or more heating elements (3) to fuse the reinforcing tape (2) of said first circumferential portion (4); wherein: the first circumferential portion (4) is between 1% and 50% of the outer circumference; and the second circumferential portion (6) is not passed over a heating element (3) and is not fused. The method is advantageous in that it can provide reinforced pipes (7) in a simpler and cheaper way because it is not essential that the entirety of the outer circumference of the reinforced pipe (7) is fused. A reinforced pipe (7) produced according to the method of the present invention is also provided.

A duct making apparatus includes a first station configured to accept a formable sheet material and a second station configured to receive the formable sheet material from the first station. The first station includes a mechanism for forming one of a male lock bend and a female lock seam in a leading edge of the formable sheet material. The second station includes a retractable conveyor. Movement of the sheet material from the first station to the second station defines an axis of travel of the sheet material. The retractable conveyor is selectively movable from a first position in which the retractable conveyor is in close association with the first station, and a second position in which the retractable conveyor is spaced from the first station.

A corner connecting structure for a box-like pipeline or container of corrugated steel plates comprises a pipeline formed by assembling corrugated steel wall plates. The planes of every two adjacent corrugated steel wall plates intersect along a straight line, and the corrugation directions of the corrugated steel wall plates are perpendicular to the line of intersection. At least one corrugated steel wall plate is composed of a first corrugated steel plate and a second corrugated steel plate, of which the corrugation directions are perpendicular to the line of intersection. An end surface of the first corrugated steel plate perpendicular to the corrugation direction and coplanar with the line of intersection intersects and is fixed to the second corrugated steel plate, and is then attached and connected to the adjacent corrugated steel wall plate through the second corrugated steel plate.

A guiding pipe for a water sprayer, and the water sprayer has a handle with an intake end configured to connect to a water source and another end connected a spray head through a guiding pipe. The guiding pipe has a spiral main tube provided with a respective circular connecting section at each end, and the circular connecting sections are respectively connected to the handle and the spray head.

A pipe for transporting gas, notably carbon dioxide, includes at least one tubular element, tubular element consisting of a juxtaposition of concentric layers including, from inside to outside, at least one sealing layer, a wall including a prestressed concrete layer and at least one circumferential mechanical reinforcement layer. Furthermore, the concrete making up prestressed concrete layer is selected from among the ultra-high performance fibre-reinforced concretes (UHPFRC).