Frequently Asked Questions

DCI, Inc., an employee-owned company, is a world leader in the manufacturing and servicing of both factory- and field-fabricated stainless steel and higher alloy storage and processing tanks, vessels, agitators and integrated systems. Proudly serving the beverage, biotech industries, chemical, cosmetic, dairy, food, nutraceutical, and pharmaceutical industries, DCI has remained true to its commitment to quality since 1955 through design and fabrication services.
DCI also offers a variety of components, including manway assemblies, agitation systems, dimple jackets, heads, and cylinders for replacement/modification applications and the OEM industry.

DCI has corporate offices and a production facility centrally located in St. Cloud, Minnesota as well as a production facility in Sparta, Missouri. It also has a partnership with its sister biotech company, Pierre Guerin in Noirt France-creating DCI-Biolafitte.

Please take a few moments to learn a bit more about our products and services, or visit pages designed to showcase our offerings for specific industries.

Complete tax and credit information forms: Credit application

A DCI Parts and Instruction Listing Manual is a collection of various information about a particular job. A manual includes drawings, bill of materials, applicable warranty information, and other job-specific information. DCI's Standard Document Package

  • TANKS PRIOR TO 1975:
    • Manuals are no longer available due to non-existent information and obsolete vendor data.
  • TANKS - 1975 THROUGH 1980: 
    • Manuals and non-stock parts are subject to available information.
    • Manuals and parts are available for all tanks fabricated after 1980.

Please contact our parts department at (320) 252-8200 for a specific quotation. As a rule of thumb:

  • TANKS - 1975 THROUGH 1980:
    • Prices are determined on a per-project charge, based on available information. 
    • Prices are determined on a per-project charge, based on available information. 

Please click here for instructions on installation/adjustment of agitator assemblies found on our technical documents page.

DCI’s new head press produces hydroformed heads in capacities ranging from 16-gauge sheet through 3/8” plate material and sizes ranging from 12” through 156” diameter. Heads are available in alloys including stainless steel, carbon steel, Hastelloy®, Inconel®, and aluminum. See components brochure or hydroformed head chart for more information. 

The minimum requirements include: 

  • Inside or outside diameter
  • Knuckle radius
  • Straight flange
  • Material thickness
  • Material type
  • Weld finishes
  • Inside/outside finishes

In most cases, a serial number or a job number is required to track part numbers. Because our stainless steel tanks are custom-fabricated, we need a serial number, job number, order number, or a drawing number to find the correct part for a specific job.

In order to return a part or component for credit or repair, you must contact a parts customer service representative for a Return Goods Authorization (RGA) number. The RGA is then assigned to the part for tracking and receiving purposes. If the part is being sent back for a credit, there may be a 30% restocking fee, which will apply to the amount being credited. If a part is non-stock, then it is non-returnable, therefore it will not be accepted back and no credit will be issued.

Sheet Material

  • 7 gauge = 0.1874”
  • 8 gauge = 0.165”
  • 10 gauge = 0.135”
  • 12 gauge = 0.1054”
  • 14 gauge = 0.0751”
  • 16 gauge = 0.0595”
  • 18 gauge = 0.049”

Plate Material

  • 0.1875”
  • 0.250”
  • 0.3125”
  • 0.375”
  • 0.500”
  • 0.625”
  • 0.750”


  • 201
  • 304
  • 304L
  • 316
  • 316L
  • 317L
  • Duplex LDX 2101®
  • Duplex 2205
  • Nitronic-60
  • Hastelloy® C-22®
  • Inconel® 625
  • Monel® 400
  • AL-6XN®
  • And many others…just ask DCI.
  • Standard Flanged & Dished
  • ASME Flanged & Dished
  • Shallow Flanged & Dished
  • Dished only
  • Flat Flanged
  • Conical
  • Torriconical
  • 2:1 Elliptical
  • 80/10

Click here to see a document with a sketch of each head type (shape).

The dish of a hydroformed head is inflated and formed using high-pressure water. Cold-formed heads are shaped by forming a flat plate into a dish by making small bumps via many passes over the entire head. For more information, please download Head Forming Processes and Comparisons.

DCI currently accepts Mastercard, Visa, Discover and American Express.

The minimum order dollar amount is $50.00.

Yes. DCI can repair broken or bent agitator shafts on prop and shaft assemblies by attaching a new shaft. This process also involves services to rebalance and reface the prop and shaft assembly once the shaft is attached. DCI can restore your prop and shaft assembly for almost half the cost of a new one. To send prop and shaft assemblies back for repair, please contact a parts customer service representative at (320) 252-8200 for a Return Goods Authorization (RGA) number and for more details on price and shipping.

Contact a parts customer service representative at (320) 252-8200 with your original purchase order number and he/she will obtain the tracking number associated with your order and track it for you.

See detailed local map for street information.

See a list of hotels that offer Corporate Rates.

We are proud to announce our newest tank-cleaning option:  the DCI Upward Spray system for silo storage tanks.
The system, with primary and secondary internal vent lines, performs all CIP (Clean-in-Place) operations without requiring access to the top of the tank. To our customers, this means a cost savings, as the additional purchase of external ladders, walkways, and cages is eliminated. An added savings benefit of the internal lines is the elimination of insulation and heat tape for the lines; lines are internal and therefore are always the same temperature as the tank. 

Another advantage to the DCI Upward Spray system is a more compact design. Due to the internal lines, alcove size is made shallower, allowing customer space savings in their facility.

The design is currently available in sizes ranging up to 40,000 gallon silo tanks; additional sizes are available upon review of customer specifications. The Upward Spray system is USDA accepted for use in 3-A silos tanks. 

While DCI still offers its traditional CIP design, we are pleased to add yet another option to our line of quality products.

Field and Factory Manufactured Equipment:

  • Adsorbant Columns
  • Brewery Process Vessels
  • Citric Process Vessels
  • Corn Syrup Absorbers
  • Corn Syrup Distribution Terminals
  • Chemical Process Vessels
  • Crystallizers
  • Distillation Columns
  • Fermenters
  • Jacketed Vessels
  • Micro Filtering Vessels
  • Nickel Alloy Tanks
  • Permeate Tanks
  • Pressure Vessels
  • Process Tanks
  • Rectifier Columns
  • Reactor Vessels
  • Scrubbers
  • Sieve Bed Vessels
  • Silos
  • Slurry Tanks
  • Steep Tanks
  • Storage Tanks
  • Stripper Columns
  • Sugar Storage Tanks
  • Vent Scrubbers
  • Water Treatment Tanks
  • Wine Tanks