What are the characteristics of good brewing equipment
1. From the main aspect— the matiral: When you buy beer equipment, almost every manufacturer says that they use 304 stainless steel, so how do we distinguish? What is the difference between 304 stainless steel and 201 stainless steel?
304 stainless steel: corrosion-resistant, heat-resistant, pressure-resistant, nationally recognized food-grade stainless steel 304 stainless steel is a common material in stainless steel with a density of 7.93 g / cm3. In order to maintain the inherent corrosion resistance of stainless steel, steel must contain more than 18% chromium and 8% nickel content. The industry is also called 18/8 stainless steel. It has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; good hot workability such as stamping and bending, and no heat treatment and hardening (using temperature -196 ° C ~ 800 ° C). Widely used in industrial and furniture decoration industry and food, medical industry. The common marking methods on the market include 06Cr19Ni10, 304, and SUS304. Among them, 06Cr19Ni10 generally indicates national standard production, 304 generally indicates ASTM (American Materials and Testing Association) standard production, and SUS304 indicates daily standard production. 200 series stainless steel was first developed in the United States as a substitute for 300 series stainless steel during World War II. At that time, due to the war, nickel as a strategic material was strictly controlled by the relevant countries, and the nickel supply in the United States was seriously insufficient. In order to solve the problem of stainless steel production and supply in the case of serious shortage of nickel supply, the United States has developed a new series of austenitic stainless steels with manganese nickel.
201 stainless steel features: a certain acid and alkali resistance, high density, polished without bubbles, no pinholes and other characteristics, is the production of various watch cases, straps, bottom cover and other high-quality materials. It is mainly used to make decorative pipes, industrial pipes, and some shallow drawn products. Cannot be used as a food material. Disadvantages: Ferrite is formed when the chromium content below 18% does not balance with the low nickel content. For this reason, the chromium content in 200 series stainless steel has been reduced to 13.5% to 15%, and in some cases it has been reduced to 13% to 14%, its corrosion resistance cannot be compared with 304 and other similar steels. In addition, manganese and, in some cases, copper reduce the effect of repassivation under the acidic conditions that are commonly found in the corrosion areas of the deposits and crevices.
Difference between 304 stainless steel and 201 stainless steel
1, 201 contains a large amount of chromium, nickel content is about 1% lower, and 304 has a minimum nickel content of 8%; 2, 201 composition is 17Cr-4.5Ni-6Mn-N, which is a Ni-saving steel. 301 steel is an alternative to steel. It is magnetic after cold working and is used in railway vehicles. The composition of 304 is 18Cr-9Ni, which is the most widely used stainless steel and heat-resistant steel for food production equipment, Xitong chemical equipment, nuclear energy, etc .; 3, 201 is high in manganese and easy to rust. 304 contains more chromium, its surface is matte and does not rust. More critically, 201 stainless steel contains high manganese, which is strongly toxic to the nervous system of the human body and harmful to the human body. The current food grade stainless steel is 304 stainless steel and above. The country has banned 201 stainless steel as the raw material for pots and pans. Therefore, craft beer brewing equipment, especially the material of the inner container cannot be 201 material. 4, the corrosion resistance is different, the corrosion resistance of 201 is very poor, not as good as 304; 5. Stainless steel is not easy to rust because the formation of chromium-rich oxide on the surface of the steel body can protect the steel body. The 201 material belongs to high manganese stainless steel, which has a higher hardness and higher carbon and lower nickel than 304.
2. English style beer brewing system and German style beer brewing equipment
The main characteristics of English beer equipment:
a. We say that the main equipment of English beer equipment includes the following parts, “Brew equipment (ie beer fermentation tanks, water treatment equipment, refrigeration equipment in German equipment).”b. The operation is simple, the equipment cost is relatively small, but its cost is high.c. This analysis is caused by British equipment: Take 200L beer equipment as an example. The main raw materials of general British beer equipment are: beer syrup (where beer syrup can be produced in German equipment), the main price range of beer syrup is 1000-1200 yuan / 28KG, which can brew about 400-600 Jin, which means that the cost of each pound can reach 2.75 yuan = 5.5 yuan / L.
The main characteristics of German beer equipment:
a. The development of German-style equipment has a history of development in China for decades. Its technology is superb, simple, and efficient. It produces pure nutritional fresh beer without filtering and high temperature sterilization, thereby retaining the unique flavor and taste of beer Nutritional ingredients, the winemaking cycle only takes 8-12 days. The main components of the equipment are “the saccharification system (self-brewed syrup), beer fermentation system, control system, refrigeration system, and washing system.”b. The operation is simple and convenient, and the equipment cost investment is relatively large compared to English beer equipment, but its brewing cost is low, and the beer profit is high.c. This analysis is caused by German beer equipment: Take 200L beer equipment as an example, The main raw materials of German beer equipment include: hops, barley malt, yeast, and water. The brewing cost mainly includes the following aspects: malt, hops, yeast, water, electricity, personnel costs, wine damage, equipment depreciation, and management costs. The overall price of beer brewing is 2.1-2.8 yuan / L.
The main differences between English beer equipment and German beer equipment are: The operation of English beer equipment only requires the purchase of syrup. Fermentation is carried out at room temperature, but the cost is twice the cost of the German beer equipment, and the taste is relatively single compared to the German beer equipment. syrup). The operation of German beer equipment is more difficult than that of English beer equipment. However, we can control the fermentation temperature of beer and the saccharification time of beer wort to produce different flavors of puree beer.