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What kind of inspection should be done when the metal hose is delivered from the factory

Time: 04-19 󰃯 Reading times: 701 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: No matter what parts leave the factory, strict inspection is required. This is also to avoid defective products entering the sales market. Before leaving the factory, the metal hose also needs to be strictly inspected. Then, we will introduce the metal soft in detail

No matter which parts leave the factory, they need to be inspected strictly. This is also to avoid defective products entering the sales market, Metal hose Before leaving the factory, it is also necessary to carry out strict inspection. Then, we will introduce in detail what inspection should be done for the metal hose when it leaves the factory.
   Stainless steel metal hose The pressure experiment, also known as strength experiment, is classified as the action target experiment. The experimental pressure is 1.5 times of the allowable value, and the experimental pressure medium is pure water. The content of chloride ion should not exceed 25ppm. Manual or electric pressure test pump is used for pressure charging. Generally, 1.5 to 4 times of the test pressure scale can be used for pressure observation, or equivalent test equipment.
During the test, the test piece is placed with a flat stainless steel metal hose, one end of which is equipped with an automatic exhaust valve plug, and the other end is connected with the inlet and outlet pipes of the test pump, the filling pipe and the exhaust pipe of the test pump, and the closed automatic exhaust valve is gradually raised to the standard experimental pressure value and pressure. After 5 minutes, check the sample condition to see if there is leakage and damaged parts. Qualified products are not allowed to show abnormal damage such as leak marks or parts damage.
The air tightness test of stainless steel metal hose is also a kind of target experiment, which stipulates that every product produced by the processing plant should be inspected. The air tightness test is carried out under the nominal condition. Gas leakage is not allowed for qualified products. Dry and clean gas or N2 or other maintenance gas is used as the experimental medium.
In use, due to wrong operation, the metal hose is damaged. Today, we will analyze the causes and solutions of metal hose damage
When the steel wire mesh is pulled off, it is unable to accept the pressure, which leads to the end of the service life of the metal hose in advance. Because the inner bellows, both sides accept and outer steel wire mesh require Trinity to be welded and assembled in order to ensure the normal application of metal hose. If the welder is a little careless in welding, the Trinity welding will not pass. Once the device is working, it will cause the external network to pull off, and there is no way to avoid shock. In order to avoid this phenomenon, it is necessary to carry out the air tightness test before leaving the factory, and the qualified side can be used in the factory.
The inner bellows gap has the phenomenon of open welding, which will also cause the metal hose to be damaged. It is due to the professional skills of the welder is careless and the destruction of the image, because the welding joint is not firm, not delicate, in the actual effect of the working pressure of the hose theme active medium, the welding will be stretched open, prompting the metal hose to burst the leakage phenomenon.
The metal hose is corrosion resistant, heat-resistant and cold resistant (- 196 ℃ ~ + 420 ℃), light weight, small size and good flexibility. Therefore, it is widely used in aviation, aerospace, petroleum, chemical plants, metallurgy, power engineering, paper industry, wood, textile, construction, medicine, food, tobacco, transportation and other industries.