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What are the application areas of duplex steel flanges?

2024-01-15

The advantages of duplex steel flanges are:


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 those of austenitic stainless steel



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, desalination equipment for offshore oil platforms (heat exchanger pipes, water treatment and water supply systems), oilfield pipelines and equipment, and various acidic and alkaline environments.


Due to its excellent wear and corrosion resistance, it has a lifespan four to five years longer than ordinary stainless steel. For example, in pipelines in seawater, using duplex steel flanges can greatly reduce the cost of product replacement and labor costs due to its long lifespan, making it relatively cost-effective.