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Advantages and disadvantages of Duplex 2205 stainless steel pipe
2205 stainless steel pipe is a welded steel pipe used for conveying water, gas, air oil, heating steam and other generally low pressure fluids and other purposes. The wall thickness of steel pipe is divided into ordinary steel pipe and thickened steel pipe; The nozzle end is divided into two types: plain pipe without thread and pipe with thread; It is divided into carbon structural steel pipe and alloy steel pipe according to material.
2205 stainless steel pipe: it is a kind of universal stainless steel pipe, which is widely used in the production and domestic water low-pressure fluid and other medium pipe and industrial gas. It is mainly used to make various gas appliances, such as liquefied petroleum gas cooker, Tiana water heater, gas tank, oil cracking furnace heat exchanger and its connecting parts and utility piping.
Specification and size of 2205 stainless steel welded pipe: nominal diameter (mm) outer diameter d= φ 1-- φ 8. The common standards for wall thickness t=1 -- 3 are gbt3091-2008 (national standard), gb-91 (American standard) and api-5l (Japanese standard).
Performance and application fields of 2205 stainless steel pipe:
1. Corrosion resistance: 2205 has good corrosion resistance and heat resistance. When the concentration of sulfuric acid is lower than 15% or higher than 85%, 2205 does not have corrosion effect; When the concentration is ≤ 65%, it has no effect on acid of general concentration, but alkali will cause stress corrosion cracking; 2205 has good resistance to stress corrosion cracking. 2105 The most commonly used chemicals in many media are concentrated nitric acid, toluene acetate, etc.
2105 can resist the erosion of most strong oxidants.
2. High mechanical strength: 2205 has high yield strength. Its yield strength limit can reach more than 250 mpa. 2105 has good plasticity after cold drawing, and its elongation during cold deformation is also large.
3.Good machinability and stamping performance: 2205 is easy to hot-press. 2105, especially for thin-walled parts.
4. High surface hardness and abrasion resistance: 2105, especially in soft state. 2305 has good wear resistance and low friction coefficient. 5. Good thermal conductivity. 2105. Good thermal conductivity. 6. Good low-temperature toughness. 7. Easy to weld. 8. Long service life. 08mm-3.
2205 duplex stainless steel pipe has excellent mechanical properties, corrosion resistance, and good weldability, and is widely used in oil and gas industry, marine engineering, chemical industry and other industries. The length of oil and gas pipelines laid with duplex stainless steel materials in the oil and gas industry has exceeded 850Km, most of which are 2205 duplex stainless steel seamless steel pipes (some are astm a790 UNS S31803 duplex stainless steel pipes and super duplex 2507 stainless steel pipes); Due to the strong corrosivity of natural gas transmission medium, 2205 duplex stainless steel material is used for high-pressure pipelines in the West-East Gas Pipeline Project.
Duplex 2205 stainless steel pipe is a composite stainless steel composed of 21% chromium, 2.5% molybdenum and 4.5% nickel-nitrogen alloy. At present, it is mainly used in high-pressure pipelines, oil and gas pipelines, sewage treatment systems and materials and pipes used in high corrosion and high pressure scenarios. In order to let you know more about 2205 stainless steel, let's talk about the advantages and disadvantages of 2205 stainless steel pipe in detail.
1. Advantages
Duplex 2205 stainless steel pipe has the advantages of high strength, strong impact resistance, overall compression resistance and corrosion resistance. Its yield strength is more than twice that of ordinary austenitic stainless steel, and it has sufficient toughness. Under corrosion resistance and high pressure environment, its overall performance is superior to that of austenitic stainless steel, and it has very strong energy absorption capacity. This is important for engineering and emergencies, such as impact Explosion and other aspects have very high use value.
2. Disadvantages
Duplex 2205 stainless steel pipe is not as versatile as austenitic stainless steel in use, and there is a medium-temperature brittle zone, so it is necessary to strictly control the heat treatment and welding process, and the product damage on the surface will affect the performance.