Stainless steel is a highly corrosion-resistant alloy steel that is widely used in a variety of fields, including food processing and kitchenware manufacturing. However, not all stainless steel can be used for food contact, especially for stainless steel materials that come into direct contact with food, and certain standards and regulations need to be met. So, what is food-grade stainless steel?
First of all, we need to understand the classification of stainless steel. Stainless steel is mainly divided into three types: austenitic type, martensitic type and ferritic type, among which austenitic stainless steel is the most suitable for food contact. According to the regulations, stainless steel in food contact must meet the national food safety standard, that is, GB9684-2011 "National Food Safety Standard Stainless Steel Products". This standard specifies the requirements for the material, surface quality, safety performance and other aspects of stainless steel for food contact.
Food-grade stainless steel needs to meet the following requirements:
1.Material: It must be made of austenitic stainless steel material that meets the national standard, such as etc. These stainless steel materials have good corrosion resistance and processability, which can meet the needs of food processing and storage.
2.Surface quality: The surface quality of stainless steel products must meet the regulations, without obvious scratches, dents, porosity and other defects. In addition, the surface treatment must also meet standards, such as polishing, sandblasting, etc., to ensure food safety and hygiene.
3.Safety performance: Food-grade stainless steel must pass a series of safety performance tests, such as corrosion resistance, tensile strength, elasticity, etc. These tests are designed to ensure that stainless steel products will not be deformed, cracked and other problems under normal use conditions, so as to ensure the safety and hygiene of food.
In addition to meeting national food safety standards, food-grade stainless steel also needs to meet certain production specifications and quality control requirements. In the production process of stainless steel products, it is necessary to strictly control materials, processes, equipment, etc., to ensure the quality and safety performance of products. At the same time, stainless steel products also need to be cleaned and maintained regularly to maintain their good use condition and food safety performance.
In a word, food-grade stainless steel is a stainless steel material that meets national food safety standards, with good corrosion resistance, processing performance and safety performance. It is widely used in the field of food processing and kitchenware manufacturing, providing a guarantee for people's food safety and hygiene.