What are the treatment methods for stainless steel pipes used in food machinery?

16 Feb,2023

What are the treatment methods for stainless steel pipes used in food machinery?

Stainless steel tubes for food machinery What is the handling method?

 

Currently, stainless steel tubing for food-processing equipment is internationally recognized as a hygienic material, offering advantages such as safety and hygiene, stable performance, high strength, corrosion resistance, and a long service life. It is also more cost-effective and requires zero maintenance costs. Stainless steel tubes for food machinery It aligns with our sustainability goals. 304 stainless steel pipes have been widely adopted in numerous municipal projects, schools, hospitals, and other water‑supply systems. Beyond everyday water distribution, where else can 304 stainless steel pipes be used? They make excellent potable‑water transmission lines. Thin‑walled 304 stainless steel pipes boast a low leakage rate, helping to conserve precious water resources. These pipes are suitable for both hot‑ and cold‑water applications. In the 1980s, pipe leakage stood at around 17%; after switching to 304 stainless steel piping, the leakage rate dropped to 7%. Even when water‑supply systems were damaged during earthquakes, 304 stainless steel pipe networks remained intact. Moreover, compared with copper pipes, 304 stainless steel offers superior hydraulic performance and resists corrosion under high flow rates. Its thermal insulation is 24 times that of copper, making it highly cost‑effective.

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Stainless steel tubes for food machinery

In China’s gas‑distribution pipelines, most users employ galvanized steel pipes for residential installations. While these pipes offer the advantages of low material costs and well‑established technology, they are prone to rust and corrosion, have a short service life, and incur high maintenance expenses. After installation, they require anti‑corrosion coating every five years. To extend the service life of gas pipelines and enhance gas safety, and drawing on the successful experience in water supply and drainage systems, it is strongly recommended to adopt thin‑walled stainless steel pipes for low‑pressure gas distribution networks.

Stainless steel gas pipes offer numerous advantages, including high tensile strength, excellent ductility and toughness, a low coefficient of thermal expansion, superior corrosion resistance, outstanding wear resistance, a long service life, light weight, and recyclability.


Stainless steel tubes for food machinery  

1. Etching method: The etching process involves screen-printing an acid-resistant protective film onto the stainless steel surface, followed by etching with a ferric chloride solution to create artistic patterns.

2. Color Spraying Method: This technique involves spraying colored particles onto a screen-printed surface, creating a pear‑skin texture and producing artistic patterns.

Process: The process flow for the colored artistic coating of stainless steel products is as follows: stainless steel product → screen printing → etching → alkaline treatment → screen printing → oxidation coloring → alkaline treatment → finished product. The etching-based artistic processing method for stainless steel products is: stainless steel product → silk-screen printing → etching → alkaline treatment → oxidation coloring → finished product.

The chemical coloring process for stainless steel does not employ pigments or dyes; instead, the steel is immersed in a heated, concentrated chromic acid solution to achieve coloration, which is characterized by excellent corrosion resistance. The inks used in this process must exhibit strong acid resistance. Typically, UV-curable inks with properties tailored to the specific processing requirements are employed.



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