be obtained by a knitting manufacturing process in this embodiment the textile element providing mechanical protection is produced by knitting of the jersey knit type other types of knitting could be used for example rib knitting by using a knitted structure it is possible to improve the effectiveness of the meltable yarn this is because the knitted textile element has a certain radial elasticity unlike for example a woven structure that has no radial elasticity thanks to this elasticity the meltable yarn is held in contact with the plastic while this meltable yarn melts thus improving the bonding and the fastening of the protective textile element to the plastic support furthermore knitting techniques make it possible unlike a braided structure for example to position most of the meltable yarn on the inside of the textile element that is to say on the side intended to come into contact with the plastic support in this embodiment the function of the textile sheath is to provide mechanical protection for a plastic support this textile sheath for mechanical protection must therefore have a number of characteristics owing to its application as mechanical protection when this sheath is intended to protect a fuel pipe in a motor vehicle it must have good.