• classification:Technical topics
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• Time:2021-04-20
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1. Tube burst: pressure exceeding the pressure specification is applied

The burst pipe after exceeding the withstand voltage range

As a channel for transmitting pressure, the high-pressure hose must withstand the pressure of the internal liquid. Because it is the basic raw material of rubber, it is a short plate on the transmission system (although it is not as durable as a steel pipe, but it can bend), it is a consumable. Pressure is an important element of pipe selection. The mismatch between the peak pressure of the equipment and the working pressure of the high-pressure tubing will cause the risk of tube bursting, which will cause the equipment to stop and even cause safety hazards! And some brands of tubing with false standard pressure or unstable quality will greatly increase the explosion. Control the odds.

2. Tube burst: use of incompatible fluid (erosion)

Inner rubber is corroded, corroded and cracked

There are many types of fluids used according to actual conditions. There are general mineral oil, water glycol mineral oil for fire prevention and disaster prevention purposes, water, chemical fluids and so on. Different formulations of rubber in the inner layer of the hose are required to be able to resist the erosion of the corresponding fluid. When the tubing that is not resistant to the fluid meets the fluid, it is easy to cause the inner rubber to crack, and the fluid (especially the water) penetrates into the steel wire layer, which accelerates the deterioration of the steel wire layer for clad pressure, and in severe cases, the weak and localized parts of the tube burst.

3. Cracking/bursting: Excessive bending of the tubing specification value

Excessive bending causes bending

Most of the hoses move repeatedly with the operation of the equipment, which requires the hose to have good toughness. At the same time, the narrow equipment installation space also puts forward higher requirements on the bending radius of the hose. This is closely related to the rubber formula and the flexibility of the steel wire. Be sure to confirm the parameters of the tubing manufacturer and the bending resistance data report issued by the relevant manufacturer. Do not select the tubing at the moving part by hand. Unmatched tubing selection and regular spot inspections are not in place, and the outer rubber cracks and steel wire breaks are prone to occur in the areas where the bending stress is concentrated, and the pipe bursts.

4. Abrasion/pipe bursting: accelerated deterioration under unfavorable environments

Excessive wear caused the outer layer of rubber to fall off, it must be replaced immediately

Rubber products are generally afraid of ultraviolet rays, ozone, water, high temperature, and friction, all of which accelerate their aging and affect their service life. The equipment is inevitably in a high temperature and high humidity environment, and the outdoor storage of construction machinery has higher requirements for the hose rubber formula. Therefore, avoid friction, excessive bending, reduce bending frequency, avoid high temperature and humidity, and be stepped on.