Duplex Stainless Steel Pipe Is A Corrosion-resistant Steel Pipe In The Petroleum And Other Industries

Due to its special advantages, duplex 2205 pipe is widely used in petrochemical equipment, seawater and wastewater treatment equipment, oil and gas pipelines, papermaking machinery and other industrial fields. They are excellent stainless steel pipes. Duplex stainless steel has also been studied for use in the field of bridge load-bearing structures.

1. Neutral chloride environment

Duplex stainless steel is widely used in neutral chloride environments. In the process of manufacturing, a small amount of chloride ion-containing solution is usually used as cooling water, which causes stress in ordinary austenitic stainless steel (such as AISI 304/316). The tendency to corrode, and duplex stainless steel can solve this problem very well. The corrosion resistance is usually expressed by the pitting equivalent index PRE=Cr% +3.3Mo%+16N%, wherein the duplex stainless steel has a PRE value greater than 24 and an austenitic PRE less than 20.

2. Oil and gas industry

Since the 1980s, duplex stainless steel has been used more and more in the production of acid gas and oil, mainly used in the production of pipe linings, heat exchangers and pipeline systems onshore and offshore. Especially in the production of oil and natural gas, most of the duplex stainless steels face an acidic environment, that is, an environment containing a large amount of chloride ions, carbon dioxide and some sulfur dioxide. In the vicious environment of wet carbon dioxide containing chloride ions, duplex stainless steel is the first choice for an ideal material. It is resistant to high flow rate wear and corrosion and is more resistant to high flow rate wear and corrosion than carbon steel and stainless steel with corrosion inhibitor. It is also used in the uphole piping system to reduce the weight of materials.

3. Seawater environment

Seawater is one of the most corrosive media in the natural environment. In the case of hot sea water, super duplex stainless steel is mostly used. For example, a seawater exchanger made of SAF 2507 super duplex stainless steel has not been found to be corroded for 3 years, and the titanium tube can only be used for 3 months because it is not resistant to corrosion.

4. Pulp and paper industry

Duplex stainless steel has been in the development of pulp and paper industry for more than 40 years, and 3RE60 duplex stainless steel was first used in this field. In addition to 3RE60 steel, other duplex stainless steels such as UR45N (SAF2205), UR47N (00Cr25Ni6.5Mo3N), UR52N+ (00Cr25Ni6.5Mo3.5CuN) are used in various industrial fields.

5. Fertilizer industry

The urea industry is also one of the earliest departments to use duplex stainless steel. The heat exchange equipment containing chloride ion water in the device is used more. The original 304L austenitic stainless steel tube bundle was used, and the stress corrosion cracked one month later, causing leakage. Duplex stainless steel can be used for more than 5 years, and then the first and second stage coolers are also replaced with 18-5Mo or SAF2205 duplex stainless steel.

Due to the good corrosion resistance of the duplex stainless steel in the urea medium, it is suitable for the production of the key equipment of the urea production pump.

In addition, the domestic 0Cr25Ni6Mo3CuN aging strengthening duplex stainless steel has excellent wear and corrosion resistance.

6. Transportation industry

In recent years, the marine chemical transport ship industry is the largest duplex stainless steel user in foreign countries, accounting for about 50% of the hot rolled sheet. Chemical tankers carry a wide range of liquid cargoes, including chemical and petrochemical products, requiring cabin materials to be both corrosion resistant, high strength and excellent plasticity. At present, SAF2205 duplex stainless steel pipe and fittings has replaced austenitic stainless steels such as 316L and 317L"s, making it the material of choice for marine chemical tankers.

New service from OilVoice
Trip Shepherd is for companies who need to track their staff in areas of risk.
It's free to use, so we invite you to try it.

Visit source site

oil industryduplex pipesuper duplex pipeduplex 2205 pipestainless steel pipes for oil

More items from cnwellgreen

Advantages Of Duplex 2205 Pipe Over Oil Industry

Why Duplex Pipe Be Used In Oil Industry Compared with 316L and 317L stainless steels, 2205 duplex stainless steel has better performance in pitting and crevice corrosion resistance.It has high corrosion resistance and a lower coefficient of thermal expansion than austenite Higher thermal conductiv ...

roger chen - kaysuns industry limited

Posted 1 month agoPress > oil industryduplex pipeduplex 2205 pipe +1

Manufacturing Process of Duplex Pipe - Why Duplex Pipe is Expensive

Manufacturing Process of Duplex Pipe - Why Duplex Pipe is Expensive After more than ten years of development, the manufacturing process of duplex stainless steel pipes has gradually matured, it made the material from high-end to ordinary applications. Considering the relative cost, more and more c ...

roger chen - kaysuns industry limited

Posted 1 month agoPress > Manufacturing Processduplex pipeWhy Duplex Pipe is Expensive +1

IMO 2020 and Scrubber

In the coming 2020, the sulfur-limiting order formulated by the International Maritime Organization (IMO 2020) will bring a series of changes to shipping. According to the latest estimates by the Exhaust Gas Cleaning Systems Association (EGCSA), at least 4,000 ships will be equipped with scrubbers ...

roger chen - kaysuns industry limited

Posted 2 months agoPress > IMO 2020Exhaust Gas Cleaning Systems AssociationInternational Maritime Organization

Annual Output Value Reaches 10 Billion! Guangdong Yongjin's Stainless Steel Phase I Has Been Completed 90%, Trial Production Next Month!

We carry out the cold rolling process independently, all relying on the upstream raw material support. Here in Yangjiang city, we must rely on the supply of Guangqing's raw materials. Its raw material guarantee has great support for the supply of our customers. After the first phase of the project ...

roger chen - kaysuns industry limited

Posted 2 months agoPress > cold rolling processstainless steelYongjin inc. +1

Posco Achieves Steel Operating Profit Of More Than 1 Trillion Won For 9 Consecutive Quarters

Posco Achieves Steel Operating Profit Of More Than 1 Trillion Won For 9 Consecutive Quarters As of the end of the third quarter of 2019, POSCO has achieved operating profit of more than 1 trillion won for nine consecutive quarters. POSCO announced in a conference call on October 24 that in the thi ...

roger chen - kaysuns industry limited

Posted 2 months agoPress > POSCOKoreaSTEEL PROFITS
All posts from cnwellgreen