Development of Sour Resistant UOE Line Pipe for Low-Temperature Service.

Terada, Yoshio; Ishikawa, Hajime; Chijiiwa, Rikio; Sugiyama, Masaaki; Tamehiro, Hiroshi

doi:10.2320/materia.38.236

Cited by 5 publications

(3 citation statements)

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“…Under these circumstances, a new technology has been developed where fine TiO particles dispersed in steel are utilised (TiO steel) 3,52 –. 54 In a TiO steel, TiO particles existing inside a γ grain serve as nuclei of intragranular ferrite (IGF). The IGF forms around the TiO particles, and as a result, coarse γ grains are divided into fine ferrite grains to give excellent HAZ toughness ( see Fig.…”

Section: Developments In Weldability In X70 and X80 Pipelinesmentioning

confidence: 99%

Challenges and developments in pipeline weldability and mechanical properties

Liu

Bhole

2013

Science and Technology of Welding and Joining

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Recent economic and political events have further highlighted the need for new and strategically accessible sources of oil and gas. With the continually increasing demand for oil and gas, the requirement for pipeline steels with higher strength, toughness and weldability has been one of the most important factors driving the development of high strength pipeline steels, particularly with the oil exploration proceeding into arctic and deep sea regions, enhancing the weldability and mechanical properties of the new pipeline steels and weld consumables. Developments in the welding processes for manufacture and field welding are described in terms of process principles, equipment, consumables, weld quality, process economics and further developments. The increasing and changing requirement for weldability and mechanical properties in the heat affected zone and weld metal of pipeline welds are presented along with the reported solutions to the problems.

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Section: Developments In Weldability In X70 and X80 Pipelinesmentioning

confidence: 99%

Challenges and developments in pipeline weldability and mechanical properties

Liu

Bhole

2013

Science and Technology of Welding and Joining

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“…Sour resistant OCTG or line pipes have been developed to prevent SSC and HIC. [1][2][3][4][5] For example, NACE TM0177 solution B, 6) which comprises 5% sodium chloride and 0.4% sodium acetate with an initial pH of 3.5 is requested for SSC tests. On the other hand, NACE TM0284 solutionA, 7) which comprises 5% sodium chloride and 0.5% acetic acid with an initial pH of 2.7 is requested for HIC tests.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Study of the Hydrogen Entry Behavior of Low Alloy Steels for Various Sour Environments

Hara

2018

ISIJ International

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“…Therefore, the ever increasing required yield strength levels in the pipe wall, from X60(420 MPa or 60 KSi) to X80(551 MPa-80KSi) to X100 (690 MPa-100KSi) to X120 (830 MPa-120 KSi) is just the result of economic forces. The property requirements of X120 steel for large diameter linepipe have been presented in several papers [1][2][3][4][5]. These include the following: the YS should be higher than 827 MPa, the UTS over 931 MPa, the CVN toughness at -30°C should be over 231 J, and the DBTT should be under -50°C.…”

Section: Introductionmentioning

confidence: 99%

The Thermomechanical Controlled Processing of High-Strength Steel Plate: A New View of Toughness Based on Modern Metallography

Liang

Meng

García

et al. 2013

MSF

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Modern thermomechanical controlled processing (TMCP) of advanced steels is now an important processing route in the production of engineering structures and products that are of value to society. The principles of TMCP are now practiced in the hot mill, cold mill and press forming shops around the world. Successful TMCP means that the proper metallurgical microstructure has been obtained in the required areas of the steel. The ideal microstructure is often defined by the correct phase balance and dimensions either of the parent austenite or final ferritic phase. Technological and economic demands have led to ever increasing levels of strength, especially for applications such as large diameter linepipe. The operative yield strengths in 18mm hot rolled plate have increased from X52(ferrite pearlite) in 1970 to X80(ferrite-bainite) today. The next frontier is the X100-X120 strength range, where bainitic or martensitic microstructures are required. It is clear that achieving a high-strength bainitic microstructure in heavy plate requires a high Carbon Equivalent value (C. E. II or Pcm), a rapid cooling rate, and a low water-end temperature. The requirement of high toughness and good weldability also means a low carbon content. This paper will describe the results of a research program where a steel of C. E. 0.56 and Pcm 0.23 was reheated, rough rolled for grain refinement, finish rolled for austenite pancaking, and direct quenched to below the Bs temperature. It was found that the strength and especially the toughness of the fully processed plates could not be explained using conventional metallographic techniques in conjunction with known structure-property relationships. However, the application of modern metallographic techniques based on FEG-SEM incorporating OIM led to microstructural characterization that more fully explained the observed mechanical properties. Of particular importance were the amount of MA micro-constituent, the crystallographic packet size of the bainite, and the high angle boundary character, especially the CSL boundaries, found in the microstructure. In the future, improved modeling of microstructural evolution and attendant mechanical properties will incorporate these important features.

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Development of Sour Resistant UOE Line Pipe for Low-Temperature Service.

Cited by 5 publications

References 0 publications

Challenges and developments in pipeline weldability and mechanical properties

Challenges and developments in pipeline weldability and mechanical properties

Quantitative Study of the Hydrogen Entry Behavior of Low Alloy Steels for Various Sour Environments

The Thermomechanical Controlled Processing of High-Strength Steel Plate: A New View of Toughness Based on Modern Metallography

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