A carrier tube is a hollow tube that transports fluids and is contained within an outer sheath. It can be made of metal or plastic and is often used in double wall pipes for added protection against leaks. It is also used to protect water and sewage pipes and in manufacturing to keep liquids at a stable temperature.
A carrier tube is an inner tube, or hollow cylindrical tube contained within an outer sheath. Responsible for transporting fluids, the conveying tube runs through an outer, insulated casing that serves as a containment system that protects against spills. Conveyor tubes can be made of strong metal, such as steel, as well as plastic, such as polyvinyl chloride (PVC) or fiberglass. The containment tube surrounding a conveying tube may be insulated or hollow. If the containment tube is hollow, small blocks called spacers located inside the containment tube help keep the containment tube properly aligned within the containment system.
In a protected piping system that employs a carrier tube, the outer tube is often called a containment tube, jacket tube, or shell tube. This technology is most often used in a type of pipe called a double wall pipe. In the petroleum industry, an external containment pipe that protects an ascending oil carrying pipe is sometimes called a riser. Some newer technologies in carrying and containment piping have produced carrying pipes that are coupled with flexible carrying pipes to create hoses designed to move liquids, often oil, between vessels that may be unexpectedly driven by waves.
Some support tubes have two holding tubes or double walled holding tubes. These systems are called double containment systems. Double containment systems add advanced leak protection in pipes carrying hazardous liquids. In some double containment systems, a breach in the interior retaining wall sets off an alarm alerting technicians to the leak. Using a leak notification system in a double-walled pipe helps minimize damage from conveying pipe leaks by identifying the leak before it breaches the outer containment wall.
Water and sewage pipes are housed inside containment pipes, particularly when a pipe is exposed. Protecting exposed municipal pipes helps prevent corrosion, environmental damage or vandalism. Many city codes also require all underground pipes to have double retaining walls.
In manufacturing, the conveying pipes are shrouded and insulated to protect them from damage or exposure and to protect liquids from sudden changes in temperature. The outer tubes insulate the transport tubes to keep their liquid contents at a stable and desired temperature. This feature can be important in food processing, where temperatures that are too high or too low can cause quality problems that can be as serious as food contamination. At home, water pipes that pass through an attic can rest inside a protective casing that protects them from sudden changes in temperature.
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