What Are The Common Materials Of Stainless Steel Sanitary Pipe Fittings
Sanitary pipe fittings use stainless steel as the main material because stainless steel has good corrosion resistance, high temperature resistance, high strength, easy cleaning, and not easy to rust. It is very suitable for industries with strict hygiene requirements such as food, beverages, and pharmaceuticals. So what are the common materials of stainless steel sanitary pipe fittings?
Common stainless steel sanitary pipe fittings are introduced as follows:
304 stainless steel (ASTM A270): This is a commonly used austenitic stainless steel containing 18% chromium and 8% nickel. It has good corrosion resistance and processing properties and is suitable for most general-purpose sanitary pipe fittings.
316 stainless steel (ASTM A270): 316 stainless steel contains 16% chromium, 10% nickel, and 2% molybdenum. It has better corrosion resistance than 304 stainless steel, especially in chloride environments, so it is more suitable for seawater or chloride-containing media.
Super stainless steel (such as 904L): This type of stainless steel contains higher alloying elements such as nickel, chromium, and molybdenum, as well as a certain amount of copper, and has excellent corrosion resistance, including good resistance to sulfuric acid and phosphoric acid.
In addition to the above-mentioned stainless steel materials, sanitary fittings may also be made of other materials, but these materials must meet the hygienic requirements.
Polytetrafluoroethylene (PTFE): A plastic material with excellent corrosion resistance and low friction coefficient, often used to make linings or seals.
Polyethylene (PE) and polypropylene (PP): These plastic materials can also be used for sanitary fittings, especially for non-metallic media or applications within a specific temperature range.
316L stainless steel (ASTM A270): 316L is a low-carbon version of 316 stainless steel, and L stands for "Low Carbon". Due to its lower carbon content, 316L stainless steel is less prone to intergranular corrosion after welding, so it is more suitable for sanitary fittings that require welding.
Duplex stainless steel (such as 2205): This stainless steel contains higher chromium and nitrogen, as well as appropriate amounts of nickel and molybdenum, with excellent corrosion resistance and strength, suitable for more severe environments.
When choosing Sanitary Valve, factors such as the nature of the medium, operating temperature, pressure, cost, and required corrosion resistance need to be considered.
