The first feature of product quality is the appearance quality of the product. Regardless of the product or semi-finished product, the appearance quality must be paid attention to in the production, and strict control and inspection shall be carried out on it.

      The sheath is the appearance of the floating rov cable. Its appearance requirements are smooth and round, uniform gloss, not eccentric (not exceeding the specified deviation), no mechanical damage, flattening, no visible debris, air bubbles, sand holes, obvious particles, and bamboo Nodal shape, twist shape, etc. In addition to meeting the above quality requirements, the thickness of the sheath also has a certain impact on the quality of the floating rov cable.

      It is well known that the function of the floating rov cable sheath is to protect the insulated core of the cable from damage under the action of external force and play a protective role. If the thinnest point of the floating rov cable sheath fails to meet the requirements, the cable sheath will be damaged before reaching the normal maximum external destructive force.

      If the thickness of the sheath in the production of the floating rov cable is lower than the standard requirement, it is unqualified, and the thickness exceeds the standard requirement. For example: the floating rov cable  model is DLD-KYJV22 3*1.5mm2, and the measured thickness of the sheath has an average thickness of 1.7mm. This model should refer to the GB9330-88 standard and the thickness should be 1.2mm.