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Why are food-grade stainless steel pipe fittings favored by the dairy industry

Mr. Laijing Bu January 20, 2026


Food-grade stainless steel pipe fittings are used in dairy cow milking equipment, the pipelines through which milk is transported to some large milk tanks, and the 18,000-liter large milk tanks themselves. Moreover, washing containers must also be made of stainless steel. The plate-type cooler is made of stainless steel, which lowers the milk temperature to 15°C before the milk can enter the tanks for further cooling. Even the storage tanks on the carts used to collect milk are made of stainless steel, not to mention those transportation equipment. 

Among the food-grade pipe fittings, except for the rubber gaskets, all the parts in contact with milk are made of stainless steel. The stainless steel must be corrosion-resistant. This is not only considering the milk itself, but also taking into account factors such as the cleaning chemicals and local water quality, and the water quality varies from place to place. 

Food-grade stainless steel pipes transport the milk from the tanker to the cooler. The cooler cools the milk to below 4℃, and then it is sent to storage tanks with a capacity ranging from 100,000 to 250,000 liters. 

Then, it is transported through pipelines to the milk separator. At a temperature of 50 to 65 degrees Celsius, the cream and skimmed milk are separated. The oil-resistant substances in the milk are homogenized to prevent them from being separated out after mixing. The milk is sterilized at 72 to 75 degrees Celsius, and the remaining cream is treated in the same way. Then it is cooled to 2 to 4 degrees Celsius. After that, it enters the finished milk storage silo with a volume of 15,000 to 60,000 liters. 

The many characteristics of food-grade stainless steel pipe fittings make them indispensable for today's dairy farmers. The main advantage is their cleanliness. By simply washing the equipment with hot water once a day, stainless steel is an ideal material. 

Nickel in the crystal structure of stainless steel is a metallurgical combination. The surface chromium oxide layer visible under a microscope can prevent corrosion from occurring. In fact, during the production, storage, or distribution of milk, the nickel in stainless steel does not transfer to the milk, and it is safe and reliable to use.


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