Analysis of the use of duplex stainless steel

DataTime:[2018-9-17]

For many years, the Duplex 2205 has been widely used in the oil and gas industry. In 2007, a 2205 pipe was implemented for the natural gas pipeline in Amsterdam in the Burhansi district of Oman. Duplex stainless steel 2205 was selected due to its high strength and corrosion resistance.
Duplex Stainless Steel 2205 Case Study:
For many years, the Duplex 2205 has been widely used in the oil and gas industry. In 2007, a duplex stainless steel pipe 2205 was implemented for the natural gas pipeline in Amsterdam in the Burhansi district of Oman. Duplex stainless steel 2205 was selected due to its high strength and corrosion resistance. Duplex stainless steel 2205 generally performs well in environments that include carbon dioxide in a wet gas stream. In addition, it was selected due to the availability of materials at the time.
The pipeline in the Burhani district is 36 kilometers long and passes through the desert and the Wadis. The duplex stainless steel 2205 pipe has 8 inch and 14 inch outside diameter dimensions. They are designed to emit a mixture of moisture and condensed water at a rate of 15 to 4 million cubic meters per day.
Super and super duplex case studies:
The super- and super-duplex phases are becoming increasingly popular in the oil and gas industry, and are particularly suitable for important parts that are resistant to design stresses. Many levels have been designed for this purpose, including SAF2906 (UNS S32906), 3207HD (UNS 33207) and Super Duplex 2507 (UNS32750).
Super Duplex Stainless Steel 2507: Canadian Oil Company recently implemented a pipeline of super duplex stainless steel 2507, along with 2205 duplex stainless steel code plus twoo, developed in their oil field off the coast of Newfoundland, Canada to combat seawater corrosion and existing pipelines IV. Super Duplex 2507 is a high alloy super duplex steel for extremely corrosive conditions. Primarily used for applications where high stress is exposed in chloride-containing environments such as seawater, it contains a large amount of chromium, molybdenum, and nickel. It has high tensile strength, high impact strength, low thermal expansion, high electrical conductivity, excellent resistance to stress corrosion cracking, and high resistance to pitting corrosion.
Precision Biphase Case Study:
Compared with Duplex 2205, super and super duplex stainless steels are being used in areas that require advanced performance. When duplex 2205 is too high for the application, precision duplexing offers the opportunity to reduce costs. In addition, poor duplexes have good weldability, which is very advantageous in the construction of flexible pipes and umbilicus.
The following are some case studies of the thin duplex LDX 2101 (UNS S32101) and AL20033 (UNS S32003): LDX2101: Technip uses LDX 2101 as a deepwater project in Angola for total Dalia. In addition, Rath Gibson also used the LDX2101 to build a galvanized umbilical. The precision duplex stainless steel 2101, which has stronger corrosion resistance than 304, has twice the yield strength, which can save significant cost and weight.
AL20033: In 2007, Precision Duplex AL2003 was successfully applied for the first time to unlimited flexible pipes. It was used by Murphy Oil as an oil field outside Sabah, Malaysia, known as Kikeh Field. Unbonded flexible pipes are often used around the world to transport liquids from oil and gas fields under the ocean. These pipes typically consist of a polymer and carbon steel material that is extruded and wrapped around an inner stainless steel carcass. Duplex 2205 and austenitic steels have been used for flexible pipe bodies for many years.
Flexible pipes absolutely require good corrosion performance. In addition, for deep oil fields, high strength is another important component. As the tube stress level increases, a larger cross-sectional area is required to further increase the weight. The Kikeh site at 1400 meters is actually too deep to even consider the use of 316L pipes. Various tests were conducted to evaluate the resistance to collapse, corrosion resistance, strength, and corrosion resistance in accordance with the expected environment and fatigue resistance. Based on these tests, it was determined that AL2003 met or exceeded 316L in all qualification tests and was considered an improved replacement for the 316L carcass in an unbounded flexible pipe. AL2003 also tested Duplex 2205. Although Duplex 2205 performs better than AL2003 in many areas, the result is that such a level is considered to be a satisfactory Kikeh environment. The AL2003 offers a cost advantage over the Duplex 2205, which is considered ideal for the high pressure needs of marine piping systems that transport moderately sweet oils and gases.
Source: China Duplex Stainless Steel Pipe Fittings Manufacturer - Yaang Pipe Industry Co., Limited (www.yaang.com)

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