How to distinguish the merits of the stainless steel stainless steel valves

How to discern the pros and cons of stainless steel stainless steel stainless steel valve valve stainless steel is resistant to weak corrosive medium such as air, steam, water and acid, alkali, salt and other chemical etching medium corrosion of the steel. Also called acid-proof stainless steel. In practical application, often called the weak corrosive medium corrosion resistant steel stainless steel, and called the resistance to chemical corrosion medium steel acid-resistant steel. Due to the chemical composition on the difference between the two, the former does not necessarily medium resistance to chemical corrosion, while the latter are generally not rust. Stainless steel valves in stainless steel & other; Stainless & throughout; , is not absolutely not rust stainless steel valve, but relatively under certain conditions does not rust. If the user use undeserved, its use in environment or conditions beyond the corrosion resistant ability, nature also will rust. Stainless steel valves used stainless steel corrosion rusty condition, it may also be because manufacturer selection is not reasonable, the manufacturers for the product use and choose the wrong stainless steel grades do raw material, may also be a manufacturer of production and processing technology does not pass. In addition, the manufacturer really choose the authority on the market do not conform to the relevant country or industry standard and inferior stainless steel raw materials. Use stainless steel valves stainless steel liquid, to a certain extent, you can easily see the market some of the fraud and counterfeit stainless steel face. Want to buy 304 grades of stainless steel, for example, can be provided by the manufacturer & other; 304' Products for testing. If really 304, using the above & other; The type 304 & throughout; Determination of fluid or & other Ni8” Determination test, type, it should be a corresponding test results, otherwise, it is not really material 304. If reoccupy & other; Low Ni” Determination of liquid further tests found medicine beads are purple, suggests that the product is a kind of high manganese steel, and is likely to be current popular on the market and inferior stainless steel corrosion resistance is very low, the so-called & other; 200 series stainless steel & throughout; 。 In the use of measuring a particular element in a stainless steel roughly the content determination of liquid on test identification, reference and understanding of relevant national standard of chemical composition of stainless steel.