Chemical treatment

Application of special alloys in the field of chemical treatment:
In the chemical industry, equipment often works in complex environments, such as high temperature, high pressure, low temperature, corrosive media, and so on. Therefore, steels that can withstand high temperature, high pressure, low temperature, and various corrosive media, such as sulfur or hydrogen sulfide-resistant structure or device steel, seawater corrosion-resistant steel, and low-temperature steel are required. Another example is the steel that requires direct contact with various acids, alkalis or salt baths with a higher corrosion resistance medium. In the design, how to choose the steel that meets the technical requirements and is economical is of great significance.  
Manufacture of petrochemical equipment: The main needs of users are: material 1Cr18Ni9Ti, stainless steel seamless pipes of specifications φ108mm ～ φ325mm, mainly used for pressure fluid transmission pipelines, and the tube blanks are mainly imported and domestically supplemented.  
Dye chemical equipment manufacturing: the main needs of users are 300 series of materials 304, 316, 316L, 310S, etc., cold-rolled stainless steel sheets with a thickness of 0.7mm to 3.0mm and hot-rolled stainless steel plates with a thickness of 4mm, 5mm, 6mm, and 8mm; Specification φ25mm ～ φ80mm stainless steel seamless tube; related supporting stainless steel fasteners, plumbing fittings. The above-mentioned materials are mainly used in atmospheric fluid pipelines and various tanks and kettles.  
Pharmaceutical and chemical equipment manufacturing: the main needs of users are 300 series of materials 304, 309S, 316, 321, etc., cold-rolled stainless steel sheets with a thickness of 0.7mm to 3.0mm and hot-rolled stainless steel plates with a thickness of 20mm to 50mm; material 1Cr18Ni9Ti, specifications φ25mm ～ φ80mm Stainless steel seamless tube; supporting stainless steel fasteners, plumbing fittings.
It is commonly used in evaporators, heat exchangers, filters, mixers, etc. in the production of phosphoric acid, acetic acid, and sulfuric acid, and storage and transportation equipment for sulfuric acid, such as heat exchangers.