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What are the advantages and application areas of duplex steel flanges?

2023-11-28

Performance and characteristics of dual phase steel flanges


1. The yield strength is more than twice that of ordinary austenitic stainless steel, and it has sufficient plasticity and toughness required for forming.


2. It has excellent resistance to stress corrosion cracking, especially in chloride ion environments.


3. Super duplex steel has extremely high corrosion resistance, and in some media such as acetic acid, formic acid, etc., it can even replace high alloy austenitic stainless steel, and even corrosion-resistant alloys.


4. It has good resistance to local corrosion, and compared with austenitic stainless steel with equivalent alloy content, its wear resistance, corrosion resistance, and fatigue corrosion performance are better than austenitic stainless steel.



S32760 Super Duplex Steel Threaded Flanges



Application fields of dual phase steel flanges


Due to these advantages, duplex steel flanges are widely used in various sewage treatment pipelines, deep-sea industries, seawater desalination, papermaking industry equipment, food industry processing equipment, offshore oil platforms (heat exchanger pipes, water treatment and water supply systems), desalination (desalination) equipment, oilfield pipelines and equipment, and various acid-base environments.


Due to the excellent wear and corrosion resistance of duplex steel flanges, their service life is four to five years longer than that of ordinary stainless steel. For pipelines in seawater, using dual phase steel flanges can greatly reduce the cost of product replacement and labor due to their long service life. Relatively speaking, the cost-effectiveness is still quite high.