Hot Rolled 12m Stainless Steel Round Pipe SS304 316 321 For Construction Industry

Hot Rolled 6-12m Stainless Steel Round Tube SS304 316 321 Seamless Steel Pipe For Construction Industry

1. Heavy metal content

The difference between food grade 304 stainless steel pipe and industrial pipe mainly lies in the heavy metal content of food grade 304 stainless steel pipe is far lower than the heavy metal content of industrial pipe. According to GB 31604.34-2016 national Standard for Food Safety, Determination of Lead in Food Contact Materials and Products and Determination of Lead migration, it is required that the dissolved lead content of food-grade 304 stainless steel tubes is less than or equal to 0.05 under acetic acid immersion; Industrial pipes, such as martensite stainless steel, do not specify lead content.

2, the surface

The most obvious difference lies in the surface, food grade 304 stainless steel tube surface should reach at least BA level, that is, bright surface; And the industrial pipe has no requirements for the surface, the surface is often rough, the key is high corrosion resistance.

3. Process requirements

For food grade 304 stainless steel pipe in direct contact with food, tube finish is very important. However, the inner wall of the tube needs to be polished and annealed to make the inner wall of the tube smoother and to prevent clogging if there is a liquid medium inside.

Industrial pipes are often used in polluted environments, so they require high oxidation resistance, so they are generally treated with pickling passivation. Pickling passivation can form a dense oxide film on the surface of the tube, which greatly improves the corrosion resistance of the tube.

4. Implementation standards

Food grade 304 stainless steel tube reference standard see QBT 2467-2017 "Stainless steel tube standard for Food Industry"; And the standard of industrial pipe, because of its use is divided into a number of varieties, For example, GB/T 31929-2015 "Stainless Steel Welded Tubes for Ships", GB/T 32569-2016 "Stainless Steel Welded Tubes for Seawater desalination Devices", GB/T 24593-2018 "Austenitic stainless Steel Welded Tubes for Boilers and heat exchangers", GB 30813-2014 Austenitic stainless Steel Welded Steel Tubes for Nuclear Power Plants, etc.

In the above standards, the main provisions of food 304 stainless steel pipe surface roughness and health requirements, and the main provisions of the industrial pipe chemical element content, mechanical properties, size, shape, etc..

5. Scope of application

Food grade stainless steel tube is mainly used in food, beverage, wine, medicine and other production equipment and assembly line; And industrial pipes are often used in boilers, heat exchangers, mechanical parts, sewage pipes, chemical pressure pipes and so on.

Jiangsu Irunt Steel Group Co., Ltd. is located in Wuxi City , Jiangsu Province, China, which is the largest steel production base. After 30 years of efforts, it has grown from a family factory to a group company.

The group company mainly produces and sells a series of steel products such as steel pipe, steel coil, steel plate, copper pipe, copper plate, copper strip, aluminum pipe, aluminum plate, galvanized steel pipe, galvanized coil, galvanized plate and so on.The group company has established five platforms, including three production plants and two processing plants. At present, it is still expanding its production line, basically forming a development model of integration of production, processing and sales.

Our annual production capacity of various specifications is about 1 million metric tons. In addition to being a supplier of our series of products, the group company is also committed to expanding its commitment to customers by strengthening services and adding new facilities. A dedicated team is responsible for providing technical support, recommending the correct use of steel, and assisting customers to give full play to their products.

Over the years, we have opened up new markets in Africa, Southeast Asia, the Middle East and America. Our best service and excellent quality have led long-term partners in many countries and established continuous business relations with all customers. Our principle is "service first, sales second". Most of the time, we have comprehensive inspection and procurement to control the quality of finished products. We will have a professional inspection team to test each delivery of products.

Since its establishment, in line with the mission of "contributing high-quality products and services to the world" and the core values of "customer first, excellence, coexistence and win-win", we ensure that we can deeply cooperate with all our friends in the field of iron and steel, and win more affirmation and praise from the market and customers with its high-quality products, perfect product team and thoughtful service, I believe tomorrow will be better!