In the chemical industry, equipment often works in complex environments, such as high temperature, high pressure, low temperature, corrosive media, and so on. Therefore, it is required to have high temperature, high pressure, low temperature and various corrosive medium steels, such as sulfur or hydrogen sulfide resistant structure or device steel, seawater corrosion resistant steel and low temperature resistant steel. 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.
Petrochemical equipment manufacturing: The user's main demand is that the material is 1Cr18Ni9Ti, and the specifications are φ108mm ～ φ325mm stainless steel seamless pipes, which are mainly used for pressure fluid transmission pipelines. 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 ~ 3.0mm and hot-rolled stainless steel plates with a thickness of 4mm, 5mm, 6mm, 8mm; Specification φ25mm ～ φ80mm stainless steel seamless pipe; related supporting stainless steel fasteners, plumbing fittings. The above-mentioned materials are mainly used in atmospheric fluid transmission lines 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 pipe; supporting stainless steel fasteners, plumbing fittings. Commonly used in evaporators, heat exchangers, filters, mixers, etc. in the production of phosphoric acid, acetic acid, sulfuric acid, sulfuric acid storage and transportation equipment, such as heat exchangers.
Special alloy materials commonly used in the chemical industry
· stainless steel: 253MA, 316L, 353MA, 654SMO, 904L and other
· nickel-based alloys: Alloy 31, Alloy 59, Hastelloy B, Hastelloy C, Hastelloy C-276 and other
· corrosion resistant alloys: NS112, NS322, NS333 NS335