When stainless steel is used continuously for a period of time, it is easy to fail and problems like shedding and leaking occur from time to time. And the same series of imported stainless steel joints will have more problems.

Before using stainless steel quick couplings should check for leaks, if they exist they should be immediately stopped and replaced with new products, while confirming that the gas torch valve is in a closed state before connecting. Stainless steel quick couplings should never be used for purposes other than the coupling, such as mixing with metal powder or sand and dust, etc., which may cause the inability to work or leakage. When using, the hose should be inserted firmly into the bottom of the connector and fixed with a hose belt or nut. Avoid using cracked hoses to prevent leakage and dislodgement. If vibration or shock occurs during use, stop working immediately; if forced to work, the durability of the machine will be reduced.

Using stainless steel couplings should also be careful not to exceed the maximum pressure limit, and the fluid used must be a clean fluid filtered by a filter, which does not contain other impurities. When working, the temperature should be controlled within the range of use of stainless steel quick couplings to prevent the seal material from wearing out or leaking. Do not artificially hit, bend, stretch the joint to prevent the joint from breaking.

1, Save time and labor: When disconnecting and connecting the oil circuit by quick coupling, the action is simple and saves time and labor.

2, Oil saving: When breaking the oil line, the single valve on the quick coupling can close the oil line, so the oil will not flow out and avoid the loss of oil and oil pressure.

3, Environmental protection: When the quick coupling is broken and connected, the oil will not spill and protect the environment.

4, Unique design of equipment, easy to transport: large equipment or hydraulic tools that need to be easily carried, use quick couplings to split and transport, and then assemble and use after reaching the destination.

5, economic: all of the above advantages for customers to create a variety of people commonly use magnets adsorbed stainless steel plate, to verify its merits and authenticity, does not suck no magnetic, that is good, the real thing; suckers have magnetic, it is considered counterfeit counterfeit. In fact, this is a wrong way to identify.

There are many types of stainless steel, at room temperature, according to the organizational structure can be divided into several categories:

A, austenite: such as 304, 310, 316, 321, etc;

B. Martensitic/ferritic: such as 410, 420, 430, etc;

Austenite is non-magnetic or weakly magnetic, martensite / ferrite is magnetic, usually used as a decorative plate of stainless steel is mostly austenitic type 304 material, generally speaking is non-magnetic or weakly magnetic, but due to smelting caused by fluctuations in chemical composition or additive state may also appear magnetic, but this can not be considered impostor or substandard, what is the reason? Above mentioned austenite is non-magnetic or weakly magnetic, while martensite or ferrite is magnetic, due to smelting or forging composition bias or improper heat treatment, will cause austenitic 304 stainless steel contains a small amount of martensite or ferrite organization. In this way, 304 stainless steel will have a weak magnetic properties.

In addition, 304 stainless steel after cold processing, the organizational structure will also be transformed to martensite, the greater the degree of cold processing deformation, the more martensite transformation, the greater the magnetic properties of steel. Such as the same batch number of steel strip, the production of 6cm diameter steel pipe, no obvious magnetic sense, the production of 2cm diameter steel pipe, because the cold bending deformation is larger magnetic sense is obvious some, the production of square rectangular tube because of the deformation than the round tube, especially the corner part, the deformation is more intense magnetic more obvious, the same principle, the original non-magnetic 304 stainless steel plate in the production of sink cold drawing process processing, there is magnetic generation, in The more obvious position in the sink is the folding corner part, which is the part with the largest deformation.

To completely eliminate the above reasons for the magnetic properties of 304 stainless steel plate, can be restored through high-temperature solution treatment of stable austenite organization (that is, the transformation of martensite or ferrite into austenite), thereby eliminating the magnetic properties (technical term: demagnetization treatment). In particular, the above reasons for the generation of magnetic 304 stainless steel is a normal phenomenon, it is recommended that you do not use this to measure the good or bad stainless steel sheet, we recommend that the purchase of stainless steel products should be selected from reputable manufacturers of products, do not be greedy for cheap, beware of being fooled.

2. Why does stainless steel also rust?

When the surface of stainless steel apparatus brown rust spots (rust spots), people are surprised: that "stainless steel is not rust, rust is not stainless steel, may be a problem with the quality of steel". In fact, this is a one-sided misconception of the lack of understanding of stainless steel, stainless steel in certain conditions will also rust.

Stainless steel has the ability to resist atmospheric oxidation - that is, stainless steel, but also has the ability to resist corrosion in the medium containing acids, alkalis and salts - that is, corrosion resistance. But the size of its corrosion resistance is with its steel itself chemical composition, plus mutual state, use conditions and environmental media type and change. Such as 304 plate, in a dry and clean atmosphere, there is absolutely excellent corrosion resistance, but it will be moved to the seaside area, in the sea spray containing a large amount of salt, will soon rust; and in the saline 316 plate is good performance. Therefore, not any kind of stainless steel, in any environment can be resistant to corrosion, not rust.

Stainless steel is dependent on its surface to form a very thin and strong and fine chromium-rich oxide film (protective film), to prevent the continued penetration of oxygen atoms, continued oxidation, and the ability to obtain the resistance to rust and corrosion. Once this film is continuously destroyed for some reason, oxygen atoms in the air or liquid will continuously penetrate or iron atoms in the metal will continuously precipitate out, forming loose iron oxide, and the metal surface will be subject to continuous rusting. This surface film is damaged in many forms, the most common in daily life are the following:

(1) stainless steel surface stored with other metal elements containing dust or foreign metal particles attached, in the humid air, attached to the condensation between the stainless steel, the two connected into a microcell, triggering an electrochemical reaction, the protective film is damaged, called electrochemical corrosion (such as in the stainless steel plate surface scattered part of the iron powder, in the humid air, not alone iron powder rust, will soon make the iron powder (The following stainless steel plate rust).

(2) stainless steel surface adhesion of organic juices (such as squash, machine soup, spit, etc.), in the presence of water and oxygen, constituting an organic acid, a long time is the formation of corrosion of the metal surface.

(3) stainless steel surface adhesion containing acids, alkalis, salts (such as decoration of the wall of alkaline water, lime water, Tiana water spray), will cause local corrosion of stainless steel (home renovation without attention to dilute the paint rubber water, Tiana water poured into the sink, or renovation workers with the sink to clean the apparatus containing such chemicals, are likely to make the new stainless steel sink immediately appear local corrosion or appear difficult to clean (spot pattern).

(4) in the polluted air (such as containing a large number of sulfides, carbon dioxide, nitrogen oxide atmosphere), condensation, the formation of sulfuric acid, nitric acid, acetic acid liquid point, causing chemical corrosion. The economic value is created.