Multilayered pipe for transmitting and heating fluid

Abstract

A multi-layer piping (1) for conveying and heating a fluid, in particular an aqueous urea solution including a fluid conveying pipe (2) comprising a thermoplastic elastomer, a heating element (3), a sealing element (4), an insulating layer (5) and an anti-abrasive layer (6). Preferably, it is used a polyolefin matrix based thermoplastic elastomer in which is intimately dispersed a dynamically vulcanised and EPDM based elastomeric phase.

Description

technical field [0001] The present invention relates to a multi-layer pipe for conveying and heating fluids, especially aqueous urea solutions. Background technique [0002] In order to comply with the new anti-pollution standard, which imposes more restrictions on the current exhaust emissions, the use of so-called purification systems with selective catalytic reduction is well known, also known by the abbreviation SCR for vehicle exhaust gas (“Selective”). Catalytic Reduction of Sexuality") is well known. The use of such a system is particularly useful for reducing nitrogen oxide emissions into the atmosphere. [0003] Preferably, SCR systems are used in light and heavy duty vehicles. [0004] The SCR system consists of injecting an aqueous urea solution or equivalent capable of reacting with nitrogen oxides by compressed air at the catalyst inlet. Typically, a 32.5% urea solution in water is preferred, such as the solution commonly sold by Basf under the name AdBlue. ...

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Problems solved by technology

[0011] However, due to The fact that such a solution does not allow sufficient heat conduction to heat the interior of the conduit such that the aqueous solution does not thaw quickly enough to meet the aforementioned requirements

in use, Catheters also create coupling fitting issues and are very expensive

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