Plastic Reinforced Hose has a certain degree of flexibility, so normal bending is common during installation, movement, and use. In general, slight bending that follows the natural routing of the hose does not directly prevent normal operation. However, if the hose is severely folded, locally collapsed, or compressed for an extended period, it should be inspected carefully rather than automatically considered suitable for continued use.
First, it is important to distinguish between normal bending and excessive bending. If the hose is simply bent in an appropriate direction and maintains its overall shape, with no obvious reduction in the internal passage, normal use is generally not significantly affected. However, if a pronounced crease forms at a certain point, or if excessive bending causes significant deformation of the hose wall, the normal flow of air, liquids, or other materials may be affected.
For Plastic Reinforced Hose used for ventilation and exhaust air, severe bending may narrow the internal passage and restrict airflow. A severe bend may also increase resistance within the system. Therefore, the hose should be routed smoothly during installation, and forced folding should be avoided when trying to fit the hose into a narrow space.
For hoses used to convey liquids or other materials, excessive bending may also restrict the internal passage and interfere with normal conveying. In particular, if the hose remains severely bent near an equipment connection for an extended period, that area may be continuously subjected to pulling, compression, or friction, increasing the possibility of hose damage.
If the hose becomes bent, the relevant operation can first be stopped and the hose can be placed on a relatively flat surface so that it can naturally return to its normal shape. The bent section should then be inspected to determine whether it has recovered properly. Check the hose surface for obvious creases, cracks, damage, or localized deformation. If the hose has only been slightly bent and returns to normal without visible damage, it can generally be considered for continued use based on the actual application.
If the bent section has developed obvious flattening, permanent deformation, or surface damage, it should be handled with caution. In particular, if the bent area also shows cracks, tears, or significant wear, simply straightening the hose may not solve the problem. The overall condition of the hose should be inspected further.
During actual use, attention should also be paid to whether the hose is being compressed by other objects. For example, when Plastic Reinforced Hose is installed near equipment, it may be continuously pressed by heavy objects, equipment supports, or other pipes. Even if no obvious problem is initially visible, prolonged compression may eventually cause local deformation. The hose should therefore be routed appropriately to minimize prolonged external pressure.
The hose should not be forcibly straightened during movement or adjustment. If the hose has developed a bend, its overall routing should be adjusted to restore a natural position rather than pulling forcefully on a single section. Excessive pulling may place significant stress on the hose body or connection points.
Overall, slight and natural bending does not necessarily mean that Plastic Reinforced Hose can no longer be used. However, severe folding, excessive bending, or prolonged compression may affect normal operation. Checking the hose shape, internal passage, and surface condition before use, while avoiding excessive bending during installation and operation, can help reduce problems caused by bending.