Hose installation and pipe routing principles
Hose installation and pipe routing are not just as simple as tightening the joints. The life of the hose is not eternal, but before installation, learning some basic pipe routing principles will help maximize the life of the hose.
One, suitable hose length
Metal hose has a longer service life than ordinary hoses, but it is not flexible.
If you need a pressure-resistant flexible tube, a hose is your best choice. The hose is used to transfer pressure fluid in a moving state. When the hose is connected straight, its length must be greater than the distance from port to port. Because when the hose is under pressure, under pressure, the diameter will increase and the length will decrease. Under pressure, the length can be reduced by up to 4%. This means that a 1 meter long hose will be shortened by 4 cm.
Therefore, if there is not enough slack, the connection part of the hose connector will bear excessive pressure and cause leakage or worse. The hose may be pulled loose from the joint position and cause catastrophic failure. It is important to maintain sufficient slack, but excessive slack may cause the hose assembly to wear out or people may trip over.
2. Suitable bending radius:
The hose is flexible, but its steel wire reinforcement layer also gives it relevant mechanical properties, which will limit its flexibility. One of the limitations is the minimum bending radius of the hose, which is the degree to which you can bend the hose from an arc to a sharp corner before the steel wire reinforcement layer begins to twist.
Please imagine this: each hand holds both ends of a section of hose and presses it firmly into a 'U' shape. The distance between the two ends is the bending diameter, and half of it is the bending radius. Some hoses have a smaller bending radius than others, and are therefore more flexible.
When installing the hose assembly, another important principle is to consider where the hose is in contact with the hose joint. If you need to bend the hose immediately near the metal joint, you should follow this principle: it needs to be bent at least at 2 times the pipe diameter. Therefore, if the outer diameter of the hose is 15mm, the length from the bend to the hose joint should not be less than 30mm. If this is not possible, a 90° or 45° hose connector should be considered.
When the pressurized fluid enters the hose at high speed, you don't want it to 'impact' the inner core tube, because over time, this will rapidly deteriorate the inner core and greatly shorten the service life of the hose. If 'maintain a straight length twice the outer diameter
Three, avoid hose twisting
The hose is flexible, but its steel wire reinforcement layer also gives it relevant mechanical properties, which will limit its flexibility. One way to reduce mechanical stress is to avoid twisting the hose. When arranging the pipe, you can use the mark to determine whether the hose is twisted. If you see the markings that look crooked, the hose was twisted during installation. Both ends should be loosened to eliminate the twist, use two wrenches method, one wrench to fix the hose to prevent twisting, and the other wrench to tighten the joint.
The next principle of pipe routing is to prevent the hose from twisting. Simply put, you need to limit the bending of the hose to a single dimensional 'plane'. You can imagine this: the hose moving from left to right is moving in a plane or dimension, and the same is true for the hose moving only up and down or back and forth. Any combination of left/right, front/back, and up/down motion represents a 2-dimensional plane motion, and the combination of the three represents a 3-dimensional plane motion. Multiple plane motions are called 'compound bendingTherefore, the pipe layout principle requires that the hose can only move in one plane at most; however, if your application requires the hose to move in multiple planes, please consult Hangzhou Haikuo professionals for advice.
Fourth, pipe routing and fixing
One of the main reasons for the premature damage of the hose is wear, which causes the outer rubber layer to disappear. When the steel wire reinforcement layer is exposed to moisture, it begins to rust and deteriorate, thereby reducing the service life of the hose.
Therefore, the pipe layout principle requires the hose to be clamped and fixed in place to prevent abrasion. In the first part of the pipe layout principle, we talked about the hose shortening under pressure, so do not over-clamp the hose! Friction between the hoses can also cause wear, so each hose should be clamped separately.
5. Plan the correct routing method in advance
Have you ever encountered such a situation: in order to unscrew a hose connector, you have to remove a lot of obstacles, or buy a special tool to put the wrench on the nut? Properly clothed for future maintenance Tube planning helps to save time significantly. For example, on a hydraulic valve block, there are multiple hoses stacked on top of each other in a very small space. In order to access the hose connector, you need to remove the hose at the front end. In addition, don't forget which hose is connected to which port! Using a combination of hose connectors and hard pipe connectors can effectively prevent this from happening. We have long and short straight heads and elbow joints to choose from, so that it can be more beautiful and convenient when laying pipes. Just this example can illustrate that the correct way of routing can make future maintenance more convenient and reduce downtime.