Sanitary Food Grade Stainless Steel Pipe Fittings

Food production process conditions is very complex, so food machinery is extremely complex to materials have higher requirements, therefore must master the material performance, on select material in food machinery equipment that can make the right choice, to made the right choice, in order to obtain the best use effect and the most economic benefits.

Corrosive substances in food are acetic acid, lime-like acid, malic acid and other low-level fatty acids, as well as tartaric acid, succinic acid, lactic acid, casein acid; Salt, inorganic salt; Some food additives; Corrosive substances used in the manufacturing process. Contact between these corrosive substances and parts of food processing machinery will cause corrosion of parts and materials, and cause metal ions to dissolve into food, which may damage human health or destroy the flavor of food. In the corrosive environment, friction corrosion can also occur.

 Stainless steel refers to alloy steel resistant to corrosion in air or chemical corrosive media. Stainless steel the basic components in Fe - Cr alloy and Fe - Ni - Cr alloy, in addition, you can also add other alloying elements, such as fault, titanium, manganese, niobium, aluminum, hook etc. As a result of the alloy composition, corrosion resistance and high temperature resistant performance is also different, Fe - Cr is the most basic constituents of stainless steel when Ming content more than 12% of steel, can resist medium In corrosion, but the content of Ming generally does not exceed 28%.

Stainless steel has the advantages of corrosion resistance, no rust, no color and attached food easy removal and good high and low temperature mechanical properties, widely used in food machinery pumps, valves, tubes, POTS, pans, heat exchangers, vacuum containers and other appliances. The corrosion resistance of stainless steel varies with its chemical composition, processing status, service conditions and environmental media type. Some models of stainless steel generally have good corrosion resistance, but conditions will change to rust. 

For example,304 and 316 stainless steel is commonly used for food contact components,304 stainless steel can meet the general corrosion resistance requirements, but the salt resistance is poor; 316 type stainless steel because of the chemical composition of Ni content is higher than 304, its corrosion resistance is better than 304 type.