A beer keg, a fundamental vessel for storing and dispensing Beer, plays a pivotal role in the brewing industry. Exploring the materials and manufacturing techniques behind these kegs offers valuable insights into their design, functionality, and impact on beer quality. In this article, let’s learn more about “What is a beer keg made of?”.

Beer kegs serve as containers that house and preserve Beer, ensuring its freshness from brewery to consumer. Beer kegs are made of stainless steel or, less commonly, aluminum. These kegs are a cornerstone of the beverage industry, enabling efficient storage, transportation, and distribution of Beer to various establishments.

Comprehending the materials, such as stainless steel or aluminum, used in beer keg production is essential. This knowledge aids in maintaining the Beer’s taste, quality, and safety throughout its journey, underscoring the significance of material selection and manufacturing precision.

What is a Beer Keg made of: History of Beer Kegs 

The historical backdrop of brew kegs follows back to antiquated civic establishments, where people utilized different holders to store and move drinks. Nonetheless, as far as we might be concerned today, the cutting-are of the Beer keg has developed over the long run.kegs

In the late nineteenth century, people typically used wooden containers and kegs to store and ship Beer. While mighty, these conventional compartments acted with difficulties such as spillage, waste, and trouble dealing with them because of their size and weight. The requirement for additional productive and robust arrangements became obvious as industrialization progressed.

The mid-twentieth century saw a groundbreaking change in Beer keg innovation with the presentation of tempered steel. This material offered a noteworthy improvement regarding cleanliness, erosion opposition, and sturdiness. As the Beer business extended universally, aluminum became a feasible material for brew kegs. Aluminum kegs are lightweight, recyclable, and impervious to erosion, making them reasonable for homegrown and trade markets.

Main Components of a Beer Keg

A Beer keg is a perplexing vessel made out of a few essential parts that work as one to store, transport, and administer brew while keeping up with its quality and newness. The primary functions of a Beer keg incorporate the external shell, internal coating, and valve framework.keg

  • Inward Covering: The inward covering of a Beer keg is urgent for safeguarding the taste and nature of the brew. This covering keeps the Beer from direct contact with the external shell, taking out the gamble of flavor pollution or responses with the metal. The smooth and idle inward surface likewise works with a simple cleaning, guaranteeing no lingering flavors from past clumps remain.
  • Valve Framework: The valve arrangement of a Beer keg is liable for managing the stream and administering the brew. It comprises different parts, including a keg coupler, a gas channel valve, a tension help valve, and a Beer outlet valve. The keg coupler associates the Keg to the apportioning framework and initiates the gas pressure expected to push the brew out. The tension alleviation valve guarantees well-being by delivering an abundance of pressure.

What is Kegs Made Out Of: Materials Used in Modern Beer Kegs

Present-day brew kegs are created from a scope of materials, each picked for exceptional properties that add to the capacity, conservation, and administering of Beer. The three essential materials utilized in current Beer kegs are Stainless steel, aluminum, and plastic.beer keg

  • Stainless Steel: Stainless steel is the most broadly involved material for brew keg development, valued for its excellent solidness, consumption opposition, and clean properties. Its non-responsive nature guarantees that the brew’s flavor and quality stay unaltered, making it an optimal decision to put away different Beer styles. Tempered steel kegs are likewise simple to clean and disinfect, which is urgent for keeping up with severe cleanliness norms in the preparation business.
  • Aluminum: Aluminum brew kegs have acquired prevalence because of their lightweight nature and recyclability. Notwithstanding, aluminum is more inclined to marking and scratching contrasted with tempered steel, which can affect its appearance and solidness after some time. Furthermore, the metal’s marginally higher conductivity can prompt faster temperature changes, possibly influencing the brew’s consistency if not overseen cautiously.
  • Plastic: Plastic brew kegs, frequently produced using high-thickness polyethylene (HDPE), have tracked down their specialty in the business. They are generally utilized for unique occasions, open-air get-togethers, and circumstances where customary metal kegs may be unreasonable. Plastic barrels are lightweight and expendable, making them simple to move and discard after use. They likewise offer the upside of being impervious to effect and breaking. Notwithstanding, plastic’s penetrability to oxygen and carbon dioxide is higher than that of metal, which can influence the Beer’s timeframe of realistic usability and carbonation levels. To alleviate this issue, one might fix plastic kegs with oxygen and gas hindrance materials.

The Manufacturing Process

It involves the following:

  1. Serial Determination and Arrangement: The initial step is choosing the suitable material, like tempered steel, aluminum, or plastic, in light of the Keg’s planned use and qualities. When picked, the material is ready by cutting and molding it into the necessary parts for the Keg’s external shell and internal coating.
  2. Framing and Welding: The metal sheets are framed into the ideal shape utilizing different methods like stepping, rolling, or profound drawing. For hardened steel and aluminum kegs, welding is a pivotal interaction to join the parts safely and make a consistent design that can endure pressure and mechanical burdens.
  3. Surface Treatment: The external surface of the Keg goes through medicines like cleaning, passivation (for tempered steel), and covering (for aluminum) to improve erosion obstruction and appearance.
  4. Internal Coating Application (if appropriate): An internal coating may be applied to forestall direct contact between the brew and the metal for tempered steel kegs. This coating guarantees the Beer’s flavor stays untainted and safeguards against possible communications between the mixture and the metal.
  5. Valve Framework Establishment: The valve framework, including the keg coupler, gas delta valve, pressure alleviation valve, and brew outlet valve, is introduced into the Keg. These parts are essential for controlling the brew’s stream, pressure, and apportioning.
  6. Quality Control Measures: Throughout the assembling system, thorough quality control measures guarantee the Keg’s respectability and execution. This incorporates examinations of welding, pressure testing to confirm the Keg’s protection from inner strain and checks for spills and imperfections.
  7. Last Get Together and Bundling: The Bundling guarantees that the Keg stays safeguarded during transportation. And that it shows up at its objective in perfect condition.

Types of Beer Kegs

Beer kegs come in different sorts; each intended to suit the explicit requirements and inclinations of brewers, merchants, and purchasers. Some primary brew kegs incorporate standard, cheesy, and little kegs (Cornelius kegs).

  • Standard kegs: Standard kegs, otherwise called business kegs or standard-size kegs, are the most well-known type utilized in the blending business. These kegs are regularly more enormous and have a normalized limit. They hold around 15.5 gallons (roughly 58.67 liters) of Beer. Standard barrels are now and again produced using tempered steel or aluminum, guaranteeing sturdiness and simplicity of cleaning. Breweries, bars, and cafés ordinarily utilize them to store and apportion enormous amounts of Beer. Which makes them a fundamental piece of the drink appropriation framework.cornelius keg
  • Cliché kegs (Cornelius kegs): Cliché kegs, frequently called Cornelius kegs, have a particular history established in the soda business. Initially used to administer sodas, these little and versatile kegs have tracked down another reason in the local specialty beer area. Cheesy kegs commonly come in 5-gallon (19-liter) and 2.5-gallon (9.5-liter) sizes. Their reduced nature makes them ideal for trial and error, stockpiling of more modest groups, and simplicity of transportation.
  • Smaller than average kegs: Smaller than average kegs, otherwise called party kegs or thickset kegs, give a helpful and convenient method for getting a charge out of draft Beer at home or during get-togethers. These kegs have a limit of 1.3 to 5 liters, ideal for dividing between a little gathering. Scaled-down kegs are famous decisions for occasional deliveries, restricted-release Beers, or for the people who need a draft brew insight without focusing on an enormous keg.

What is Beer Kegs Made of: Advantages of Using Stainless Steel Kegs

Tempered steel kegs offer various benefits that go with them, a famous decision in the blending business.

  • Toughness and Life span: Tempered steel is eminent for its outstanding sturdiness and protection from erosion. This guarantees that kegs keep up with their underlying trustworthiness after some time. This strength makes tempered steel kegs appropriate for rehashed use, lessening the requirement for successive substitutions. Brewers and merchants benefit from enduring speculation. Shoppers can believe that the barrels will last taking care of and transportation without compromising the Beer’s quality.keg tap
  • Taste Safeguarding: Tempered steel’s non-responsive nature guarantees that the Beer’s flavor stays untainted. The shortfall of collaborations between the metal and the Beer safeguards the first taste and smell. This permits the drink to hold its expected attributes from distillery to glass. This element is essential for keeping up with the quality and consistency of the Beer. It also fulfills the two brewers and shoppers.
  • Ecological Advantages: Hardened steel kegs add to natural manageability because of their reusability. The lengthy life expectancy of Stainless steel kegs limits the assets expected for assembling and removal. Moreover, tempered steel is entirely recyclable, further decreasing its ecological effect. To understand more, check out how much a keg of beer costs. 

Maintenance and Cleaning

Here is a breakdown of the significance and moves toward cleaning a brew keg. Also, here are some everyday issues to keep away from:

Significance of Standard Cleaning:

Standard cleaning forestalls the development of yeast, silt, microbes, and different toxins that can think twice about the flavor and well-being of the brew. Flat brew buildups can prompt off-flavors, influencing the drinking experience. home brew kegMoreover, lacking cleaning can bring about form development, obstructing, and exorbitant frothing during apportioning. Cleaning is also essential to preserve the quality of the beer for a better long-lasting experience. 

Moves toward Clean a Beer Keg:

  1. Disassembly: Eliminate the valve framework parts, including the keg coupler, Beer outlet valve, and gas channel valve.
  2. Pre-Rinse: Flush the Keg with boiling water to eliminate leftover brew, debris, and jetsam.
  3. Cleaning Solution: Set up a cleaning arrangement of brewery-endorsed cleansers and warm water in a keg cleaning unit or committed cleaning framework.
  4. Circulation: Siphon the cleaning arrangement through the Keg utilizing a cleaning framework. This guarantees that it arrives at all pieces of the barrel.
  5. Soaking: Permit the answer for the douse for the prescribed chance to separate buildups and impurities.
  6. Rinsing: Completely flush the Keg with clean water to eliminate the cleaning arrangement and any released trash.
  7. Sanitization: After flushing, disinfect the Keg with a fitting cleaning to kill any leftover microbes.

See also: Cost Analysis: How Much For A Keg Of Bud Light In 2024?

Everyday Issues and How to Stay Away from Them:

  • Cross-Contamination: Keep different Beer styles separate to forestall flavor tainting. Clean and disinfect thoroughly between various Beers.keg weights
  • Inadequate Rinsing: Inappropriate flushing can abandon cleanser deposits, influencing the brew’s taste and froth security.
  • Stale Brew Odor: A tenacious lifeless Beer smell shows inappropriate cleaning. Utilize suitable cleaning specialists and guarantee intensive cleaning and disinfection.
  • Blocked Lines: The inability to clean kegs can prompt stopped-up lines and poor administering. Customary cleaning forestalls development that can impede lines.
  • Foaming Issues: Messy or oily kegs can cause unnecessary frothing during administration. Legitimate cleaning guarantees a smooth pour.

See also: Beer Measurements: How Many Beers In A Pitcher?


What do people typically make beer kegs from?

Commonly, manufacturers make beer kegs out of stainless steel or aluminum because these materials offer durability, corrosion resistance, and ease of cleaning.

Why are stainless steel and aluminum preferred materials for beer kegs?

Stainless steel and aluminum offer durability, corrosion resistance, and non-reactivity with Beer, preserving its flavor. They are also easy to clean and maintain, ensuring the Beer's quality.

Do people use any other materials for beer kegs?

In addition to stainless steel and aluminum, some manufacturers use plastic to make kegs, which provides portability and disposability. However, plastic barrels may have limitations in gas and oxygen permeability.

How do the materials used in Beer kegs impact the environment?

Stainless steel and aluminum kegs are reusable and recyclable, contributing to environmental sustainability by reducing waste and resource consumption. Plastic barrels can be disposable but might have a more significant environmental impact due to their shorter lifespan and potential for waste generation.


In conclusion, “What is a beer keg made of?” is easy to answer. The materials used in Beer kegs play a pivotal role in ensuring these essential vessels’ quality, longevity, and environmental impact. Stainless steel and aluminum kegs maintain the taste and integrity of Beer. They serve as durable, reusable options that align with sustainability goals. While plastic barrels offer convenience, they come with certain limitations in terms of both beer preservation and eco-friendliness. As the brewing industry evolves, making informed choices about keg materials safeguards the Beer. It supports sustainable practices, fostering a more responsible and environmentally conscious approach to production, distribution, and consumption.

See Also: What Is Birch Beer? Varieties & Comparison With Root Beer

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