Duplex stainless steel for chemical tanker manufacturing
TTT curves of duplex stainless steel with different compositions Compared with 316L and 304L, duplex stainless steel has The new material analyzes high strength, realizes thickness reduction, and at the same time has enhanced corrosion resistance, and can transport more types of chemicals, so it is an ideal material for making liquid tank liners. Due to the variety of chemicals, there are very high requirements on the surface roughness of the ship plate (generally Ra≤5μm), and considering the corrugated plate pressing and the structure of the liquid cargo tank, the steel plate is required to have better Plate shape, uniform distribution of residual stress, qualified tensile properties in the thickness direction and no brittle phase precipitation.
Duplex stainless steel for pulp and paper
Most of the traditional cooking equipment are pressure vessels. At the working temperature of 160-180°C, the above-mentioned salts have a corrosive effect on the equipment. The bleaching waste liquid has the greatest impact on the environment and the most serious pollution. The corrosive medium of the bleaching equipment is mainly Cl-, H+ in the chlorination section, and the oxidants Cl 2 and Cl O 2, which are found on the top of the chlorination tower or on the washing machine. Severe corrosion phenomenon, can not use 31 6 L. The duplex stainless steel can better solve the corrosion problem, and at the same time has a significant advantage in reducing the wall thickness.
Duplex Stainless Steel for Natural Gas Gathering Lines
In the process of oil and gas extraction, the gas gathering pipeline will serve in the acidic environment containing a large amount of H2S, CO2 and CI—even very high CI—. Duplex stainless steels are used to make natural gas gathering lines. Duplex stainless steel is made of seamless steel pipe and welded steel pipe, and pipeline engineering is applied.
Duplex stainless steel for nuclear power
As a clean energy source, nuclear power is of great significance for energy conservation and environmental protection. Among many nuclear power equipment, the cladding plate material of the spent fuel pool is determined to be S32101 economical duplex stainless steel instead of 3 0 4 L stainless steel, mainly because of its high strength, good corrosion resistance and low Ni content. At the same time, there are clear requirements for the high-temperature instantaneous stretching of S 3 2 1 0 1 at 1 3 0 ℃ (Rp0.2≥362MPa). The thickness range of engineering design plates is 6.35-50.8mm, and the maximum plate width is The plate length is 13700mm.
Duplex stainless steel for bridges (cross-sea bridges)
For building bridges, especially sea-crossing bridges, due to the harsh environment (Cl-concentration as high as 20,000ppm), offshore construction and maintenance are difficult, the corrosion damage of bridge piers has become a long-life, safe and low-cost operation of cross-sea bridges. link. The duplex stainless steel reinforcement has the advantages of high corrosion resistance, high strength and toughness, and is convenient for construction on the island. It has become an ideal solution for the key parts of the international construction of cross-sea bridges.
Duplex stainless steel for building curtain walls
Due to the uniqueness of the coastal climate, the curtain wall brackets made of ordinary 304 and 316 often have surface corrosion, which affects their appearance and safety. Practice has proved that the selection of 2205 duplex stainless steel can fundamentally solve the above problems.
Duplex stainless steel for seawater desalination
Seawater desalination is to use multi-stage flash evaporation or multi-stage fractional distillation to process seawater and turn it into daily production and domestic water.
Duplex stainless steel has good resistance to Cl-pitting corrosion, and its demand increases with the increase of the designed daily seawater treatment capacity. 2304 and 2205 plates have been used to manufacture main equipment for seawater desalination. In addition, the duplex stainless steel series are also used in many fields such as urban rail transit, large-scale water conservancy projects, environmental protection desulfurization projects, and water treatment.
