10000L 20000L Stainless Steel 304/316L Outdoor Milk Storage Tank Silo

We fabricate these large outdoor milk storage tanks in 10,000 and 20,000 liter capacities. They are built for raw milk holding at dairy farms, collection stations, and processing plants where indoor space is not an option.

The shell is rolled from SUS304 or SUS316L plate, depending on the client\’s cleaning chemicals and local water quality. We use 316L when the tank will see frequent caustic and acid wash cycles, or when the site water has elevated chloride content. For most raw milk holding, 304 is sufficient, but we will not push you toward a cheaper grade if your washdown routine will punish it.

Welds are fully penetrated and argon-backed on the product side. Interior surfaces are ground and polished to a Ra ≤ 0.6 µm finish, which keeps bacteria from finding footholds. Exterior surfaces are brushed or polished to match your site standards. The cone bottom is sloped at 6 degrees to ensure complete drain-out through the outlet valve. The flat top is reinforced to support a manhole, vent, CIP spray ball, and level instrumentation without flexing.

These are atmospheric storage vessels. They are not designed for pressure or vacuum service. If your process requires either, we need to know before quoting because the shell thickness, head shape, and stiffening rings all change.

Standard fittings include a 2-inch outlet, top manhole, pressure/vacuum vent, and a CIP spray device. We can add an external level gauge, temperature probe, or a glycol cooling jacket around the lower shell. The jacket is dimple or half-pipe construction, and we calculate the heat transfer area based on your required cooling rate.

These tanks are common in dairy farms, juice concentrate lines, and edible oil storage. They are not suited for aggressive chemicals or solvents. If you are storing something other than food liquids, tell us the chemical composition and pH range before we recommend a material.

Specifications

• Capacity: 10,000 L / 20,000 L (working volume approx. 95% of total)
• Material: SUS304 or SUS316L, 2B or No.1 finish
• Interior surface: Ra ≤ 0.6 µm, mechanically polished
• Exterior: brushed or mirror polish
• Bottom: cone bottom, 6° slope
• Top: flat with reinforced manway
• Design: atmospheric, non-pressure
• Options: glycol jacket, level sensor, temperature probe, CIP spray ball, ladder and platform

FAQ

How do I choose between 304 and 316L?
If your cleaning protocol uses phosphoric or nitric acid at higher concentrations, or your water has chlorides above 100 ppm, go with 316L. Otherwise 304 is fine for milk and most food products.

Can this tank be used for pressurized storage?
No. These are atmospheric tanks. Pressurized or vacuum-rated vessels require different head shapes and thicker shell. Contact us with your working pressure if that is your requirement.

What is the lead time?
For these sizes, typically 3 to 5 weeks after drawing approval, depending on material availability.

How is the tank delivered?
We ship disassembled or as a welded unit depending on your site access. For 20,000 L tanks, check road clearance and crane capacity before ordering.

To get an accurate quote, send us the liquid you will store, the required capacity, your preferred material grade, working temperature, available installation footprint, and any special fittings you need. We will confirm the configuration and pricing for your specific setup.