passivation

The acid pickling and passivation solution for stainless steel is generally a mixture composed of inorganic acid oxidants, along with hydroxy acids, high-efficiency corrosion inhibitors, anti-fogging agents, and other components. For minor pickling on-site, pickling paste can be used; for full-tank pickling, it is advisable to consult a professional pickling service.

Where can I find pickling units? Help recommend some. Or is the pickling process complicated? Are there any proven solutions available?

Product: Sanitary-grade stainless steel rotating cleaning balls. Materials: 304, 316L. Pipe flow control: DN20-50 and 3/4”-2”. Connection methods: threaded, quick-install, welded, flanged. Used for various tank cleaning applications. Available in diameters of 50 mm or 10 mm, manufactured from SUS304 stainless steel with a shiny external finish. Available in styles covering 360°, only the upper area, or only the lower area. Product details: Purpose: Automatic tank cleaner. Universal cleaning balls, rotating cleaning balls, automatic cleaning balls, spherical cleaning balls, nozzle-type cleaning balls; hygiene-grade welded cleaning balls/welded rotating cleaning balls/soldered cleaners; stainless steel dual-circulation tank cleaners, 360-degree rotating tank cleaners, horn-shaped tank cleaners. These can be used for the automatic cleaning of the inner walls of various large and small sealed containers, such as railway tank cars, flatcars, various chemical tanks, oil storage tanks, and oil tankers. They are also suitable for cleaning storage tanks in industries such as pharmaceuticals, beer production, dairy manufacturing, and beverage production. By increasing the water pressure and nozzle diameter, it is also possible to clean large storage tanks with a volume of up to 3,000 cubic meters. Also known as a can cleaning ball. Features: This type of can cleaner features advanced design; it uses the reaction force of water jets to drive its own rotation. It consumes little power, has a strong cleaning force, offers automatic speed control, is efficient, and operates stably. The Haoxing tank cleaner features a compact design, small size, and light weight, making it easy to use and maintain. Technical parameters of the tank cleaner: Model: 0.6–2 inches (internal thread for pipes); sizes available: 20mm, 25mm, 32mm, 42mm. Connection types: quick connection, threaded fitting, flange, clamp type, trapezoidal thread. Operating pressure: PN0.3–1.0 MPa; operating temperature: below 100 degrees Celsius. The automatic tank cleaner equipped with a pump has a flow rate of 35–50 tons per hour, with a head of 50–60 meters. The materials used are SUS-304 and SUS316L. Features of this cleaning device: 1. Compact size for easy installation. 2. Self-cleaning and self-lubricating design – it cleans the rotating nozzle itself and lubricates the bearings while in operation, thereby ensuring a longer service life and full compliance with hygiene standards ； 3. The maximum cleaning diameter ranges from 1 meter to 6 meters (available in selected models), with 360° spraying coverage ensuring no dead zones ； 4. Made of 316L stainless steel/tetrafluoro material, with both the inner and outer surfaces polished ； 5. Only 1-3 kilograms of working pressure are required to achieve an exceptionally satisfactory CIP cleaning effect ； 6. The water consumption is very low, **which increases cleaning costs. Applications of this cleaner: it is used for cleaning small-sized tanks in industries such as pharmaceuticals, food and beverage, and chemicals, as well as containers such as barrels, tanks, reaction vessels, and mechanical equipment tanks

I plan to use this; experts, brothers, and friends, please give some advice on whether it’s suitable

Go and ask local machinery manufacturers or pressure vessel manufacturers. The pickling process is a specialized technique that involves toxic substances; do not attempt to carry it out by yourself, as it could backfire.

Yes, I am aware of the risks here, so I’m seeking better advice

Additionally, for work in confined spaces, it is necessary to strengthen the required approvals and safety measures.