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Design and production of stainless steel tanks for the beer and beverage sector.

Stainless steel tanks for the production of beer and beverages.

The best quality guaranteed by long-standing experience in the industry.

Desla Inox proposes itself in the study and feasibility of tanks and machinery for the production of craft beer and spirits. The master brewers interface directly with our technicians for the study and sizing of the tanks. The choice of materials ranges from the classic AISI 304 and 316 stainless steel to Copper. There is obviously the possibility of coupling the two materials both for a functional discussion of the process and for an aesthetic one. The company is also able to bond the two materials together. The welding technique and the subsequent mechanical polishing surface treatment with controlled roughness of less than 0.4 microns, guarantee perfect sanitization between one process and another.

Stainless steel tanks for the production and storage of beer and beverages

Stainless steel tanks are a key component of any craft beer production facility. At our company, we take pride in manufacturing high-quality tanks that meet the specific needs of our customers.

Fermenters

Our fermenters are made of AISI 304 stainless steel coated either partially or completely. Temperature control is guaranteed through the application of ashlar liners on the tank walls. According to the type of fermentation and the customer’s requests, fermenters are produced according to the PED regulations. The Desla Inox standard of fermenters provides for mechanical mirror polishing with controlled roughness of less than 0.4 microns; upon completion, washing and sanitizing are guaranteed by an adequate sizing of washing nozzles.

Cooking rooms

Desla Inox manufactures cooking rooms in stainless steel and copper dimensioned directly with the customer to optimize pre-existing spaces and systems. The heat exchange for the use of steam for cooking takes place via a 6 bar studded jacket applied to the tank walls. Insulation is guaranteed by high-density mineral wool insulation coated with scotch-brite finish stainless steel. On request, it is possible to create coatings with colored stainless steel or in the noblest copper. The tanks are all equipped with an attachment for washing by means of a rotary jet or fixed spray-ball.

Supply systems

Desla Inox is able to satisfy the customer’s requests regarding the construction of all the items that go with the tanks and systems. In fact, the company is ISO 1090 certified for the structural; stairs and walkways are made according to current legislation. The structures are designed and conceived to ensure perfect cleaning with drainage systems and materials that combine safety and hygiene.

Hot / Cold water tanks

Sized for the system, the hot/cold water tanks allow you to store an adequate amount of water that is always available. Insulation is guaranteed by a high-density mineral wool insulation covered with scotch-brite finish stainless steel. Temperature control is guaranteed through the application of embossed liners on the tank walls with the passage of steam or glycol as needed.

Aseptic bioreactors

The production of aseptic reactors has been requested by our customers operating in the beer sector for the study or production of bio-masses useful for fermentation. Since it is a very delicate process that cannot and must not have the possibility of external contamination, they are made of AISI 316 stainless steel with a roughness of 0.2 microns. They are designed with PED regulations to guarantee tightness both under pressure and in vacuum, as a result they can be perfectly sanitized at high temperatures with high pressure saturated steam insufflation.

Mixers

The mixers are designed and manufactured internally by Desla Inox; the mechanics are studied and calibrated to ensure maximum performance in terms of mixing. Sturdy blades combined with a careful choice of gearmotors also guarantee durability. The internal surfaces are of the mirror polished type with controlled roughness, in order to ensure maximum surface sanitation. Insulation is guaranteed by high-density mineral wool insulation covered with scotch-brite finish stainless steel.

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How do we produce them?

Desla Inox specializes in the design and construction of tanks and machinery for the production of craft beer and beverages. The choice of materials ranges from classic stainless steel AISI 304 and 316 to Copper. Our welding techniques and surface treatments are designed to ensure perfect sanitation between processes. We also offer a variety of customization options for your tanks to meet your specific needs.
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Used materials

Desla Inox almost entirely uses austenitic chromium-nickel steels with a low carbon content. In the AISI classification they are indicated as 300 series; in particular the AISI 304L and AISI 316 L steels (the designation L indicates “low-carbon”) so as to lengthen the time necessary for the precipitation of chromium carbides such as to allow the execution of welded structures, even of considerable thickness, without precipitations of carbides occurring in the welded areas. Good mechanical characteristics especially at low temperatures (down to -254 ° C). For high or very high temperatures we use stainless steels also called “refractory” see AISI 310S.

The main features that make these materials suitable for use in our product sectors are the following:

Surface compactness without porosity

High resistance to shocks and mechanical stresses

High resistance to sudden thermal variations

High corrosion resistance

Excellent cleanability of the surface over time, understood as high bacterial removability and low bacterial retentivity.

Welding procedures

Desla Inox has highly qualified operators with welding qualifications in both TIG and MIG techniques. The company also has an automated welding system designed and custom-made with MIG technology by top welding companies at the national and international level.
TIG stands for “Tungsten Inert Gas” and is a versatile welding technique widely used, especially in the production of stainless steel pipes. It is suitable for welding very thin materials, around 0.4-0.5 mm, with an upper limit of convenience of 5-6mm. The bead obtained has excellent mechanical, analytical and aesthetic qualities.
MIG stands for “Metal Inert Gas” and is a more automated technique that is used for thicker materials, as compared to TIG. The filler material transfer during welding can take place in three basic regimes: “short-arc”, “drop-arc” and “spray arc”. The latest welding generators have evolved with the “PULSED-ARC” regime, which is a combination of the “short-arc” technique and the fusion modalities of the “spray-arc”.

Finishes

The company has two polishing departments within it. The first semi-automated allows the surface treatment of cylindrical sheets and internal and external walls of the tanks; the same machine is also able to work on rounded bottoms of different nature and size both internally and externally. The choice to work exclusively in stainless steels and non-ferrous materials guarantees us the absence of contamination.
The finish by abrasion of a product consists in a succession of steps to remove the surface defects created during processing. These phases are obtained with the use of abrasive means that “erase” the deeper traces present on the surface. A series of cycles with increasingly higher grain sizes allow the following finishes to be achieved:
  • Satin
  • Scotch-Brite
  • Glossy
  • Mirror polished through pastes
  • Mirror glossy with ceramic based discs

In collaboration with our commercial partners we are able to supply products with a blasted surface on request. Shot peening consists in a “bombardment” of the surface with special spheres obtained with a suitable compound of glass and silica, so as to exclude the possibility of contamination of the treated piece. This technique also causes a surface hardening of the material.

Particular surface finishing technique required above all for the inside of the tanks, consists of a polishing treatment due to a passage of current in an electrolytic solution. The main advantages offered by electro-polishing are:
  • Reduction of the surface roughness of the product
  • Removal of the surface layer stressed by technological operations
  • Elimination of machining burrs
  • Increase in corrosion resistance
  • Increase of bacterial removability and therefore of the hygienic characteristics of the product
  • Removal of any surface contamination

Refrigeration or heating

The application of a heat exchange system totally depends on the type of process the machine is intended for; the choice and sizing must be carefully calculated to ensure its efficiency. The main types of heat exchange systems applied on our machines are the following:
Perforated and pressed sheet to give life to the “ashlar”, the latter once applied to the wall or to the bottom of the tanks acts as a cavity for the passage of fluids or steam. The main advantage is to be able to cover high squares and therefore increase the heat exchange surface with reduced material impact. Spot welding with MIG technique and perimeter TIG welding allow high resistance to pressure (tested up to 6 bar) and excellent mechanical properties to thermal shocks.
Literally tanks inside the tank consists in building a real cavity by superimposing one tank inside the other. This system allows, above all with the use of steam, to have an extremely homogeneous heat exchange and, where required, a delicate cooking of the product.
The application of an ascending or descending spiral of a stainless steel half-tube on the walls of the tanks is the most suitable technique where rapid heating or sterilization of the product is required. The mechanical and physico-chemical characteristics of the half-pipe allow the passage of saturated steam up to 20 bar of pressure. The system is obviously regulated by the PED regulations.

Insulation materials

The type of tank and therefore of the process for which it is intended determines the choice of the insulating material. Another no less important factor is the place of installation of the tank depending on whether it is outdoors or indoors. For these details or for specific customer needs we are able to offer the following types of insulation:

HIGH DENSITY MINERAL WOOL

Certainly the most used for the large range of sizes, thicknesses and thermal conductivity values

GLASS WOOL

Where mineral wool cannot be used for reasons of space or specific thermal requirements

POLYURETHANE FOAMS

It is blown through special holes inside the steel cavity to ensure that even the most difficult corners are reached

Would you like to learn more about our tanks? Contact us now to request more information.

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