The difference between the production process of sanitary butterfly valve and sanitary stainless steel pipe

The difference between the production process of sanitary butterfly valve and sanitary stainless steel pipe. The production process of sanitary valve and stainless steel sanitary pipe is different. The production process of industrial pipe is relatively simple and the production cost is low. So the price is different. 1. Sanitary Butterfly Valve Process Pipe Blank-Inspection-Peeling-Inspection-Heating-Perforation-Pickling-Grinding-Lubrication and Air Drying-Welding Head-Cold Drawing-Solution Treatment- —Pickling—Pickling Passivation—Inspection 2. Process flow of sanitary stainless steel pipe: Tube blank—inspection—skinning—inspection—heating—perforation—pickling—grinding—lubricating and air drying ——Welding Head——Cold Drawing——Solution Treatment——Pickling——Pickling Passivation——Inspection——Cold Rolling——Degreasing——Cut Head——Air Drying——Inside Polishing——Outside Polishing—— —Inspection—Identification—Product Features of Sanitary Butterfly Valves in Finished Packaging (SPECIALTY) Bright annealing (BA); Strict tolerance as customer required. TOLERANCE RANGE GB/T3639 GB/T8713 Roughness (ROUGHNESS) )Internal roughness: Ra ≤ 0.6μm External roughness: Ra ≤ 0.08μm can be produced according to customer requirements. Specification range (SIZE RANGE) Outer diameter: 6mm-159mm Inner diameter: 1mm-5mm 310S Stainless steel pipe factory waste rate statistical process Corrosion resistance includes Rust resistance and resistance to acid, alkali, salt and other corrosive media, as well as resistance to oxidation, vulcanization, chlorination, and fluorination at high temperatures. Since the selection of different stainless steels is mainly to solve various corrosion problems encountered in actual engineering, the corrosion resistance of stainless steel in a corrosive environment is the first consideration for the material selection personnel. Corrosion is the damage caused by chemical or electrochemical action between the metal and the medium, and the corrosion resistance refers to the ability of stainless steel to resist the corrosion damage of the medium. Therefore, when the corrosion resistance is involved in the selection of materials, the following points need to be paid attention to. 1. The standard of corrosion resistance is determined artificially. It is necessary to recognize it, use it, and not be restricted by it. The specific standard of corrosion resistance should be determined according to the specific requirements of use. At present, the corrosion resistance of stainless steel mostly adopts the 10-level standard. Which level is selected as the corrosion resistance requirement depends on the characteristics (thickness, size) of the equipment and each part. Service life, product quality (such as impurities, color, purity), etc., generally speaking, for equipment, meters and components that require smooth mirrors or precise dimensions during use, you can choose 1 to 3 standards; closely cooperate with the requirements For equipment that does not leak for a long time or requires limited use, the components are selected from 2 to 5 levels. For equipment that does not require high maintenance and easy maintenance or requires a short life, the components can be selected from 4 to 7, except for special exceptions, stainless steel is in use Under the conditions, the annual corrosion rate is more than 1mm. Generally, it is not used. It should be pointed out that the level 10 standard is not applicable when local corrosion occurs.