Heavy Wall Seamless Line Pipe X70–X80 for Sour Service Applications

2010 ◽  
Author(s):  
Joachim Konrad ◽  
Diana Toma ◽  
Volker Rohden ◽  
Guido Kubla
Keyword(s):  
Low Temperature ◽  
Deep Water ◽  
High Performance ◽  
High Pressures ◽  
Development Program ◽  
High Strength ◽  
Low Carbon ◽  
Line Pipe ◽  
Exploration And Production ◽  
Sour Service

The continued shift of exploration and production to deep water fields will require the industry to develop alternative pipe solutions to cope with the challenging demands of these exploration regions. Because of the complexity of exploration conditions in deep water fields, e.g. high pressures, low temperature and sour reservoirs, higher grades and heavier wall thickness in combination with low temperature toughness and suitability for sour service are required. The Vallourec&Mannesmann Tubes’s alloying concept for line pipe steels based on low carbon concept [1] was extended to grades X70 and X80 with wall thicknesses up to 75mm. In this paper the latest results on industrial studies on high strength heavy-wall steels manufactured by seamless hot rolling and subsequent quench and temper treatment are presented. The work is a part of the development program for high performance heavy wall seamless pipes for special applications such as J-lay collars, buckle arrestors and risers. Mechanical properties, advanced metallographic examinations, results of the sour service resistance and weldability are reported.

Alloying Concept for High-Strength Seamless Heavy-Wall Line Pipe Suitable for Sour Service Applications

2004 ◽  
Author(s):  
K. Biermann ◽  
C. Kaucke ◽  
M. Probst-Hein ◽  
B. Koschlig
Keyword(s):  
Heat Treatment ◽  
Wall Thickness ◽  
Oil And Gas ◽  
High Strength ◽  
Gas Production ◽  
Pipe Material ◽  
Low Carbon ◽  
Line Pipe ◽  
Oil And Gas Production ◽  
Sour Service

Offshore oil and gas production worldwide is conducted in increasingly deep waters, leading to more and more stringent demands on line pipes. Higher grades and heavier wall thicknesses in combination with deep temperature toughness properties, good weldability and suitability for sour service applications are among the characteristics called for. It is necessary that pipe manufacturers develop materials to meet these at times conflicting requirements. An alloying concept based on steel with very low carbon content is presented. This type of material provides excellent toughness properties at deep temperatures in line pipe with a wall thickness of up to 70 mm, produced by hot rolling followed by QT heat treatment. Pipes from industrial production of identical chemical composition and heat treatment achieved grades X65 to X80, depending on wall thickness. The properties of the steel used in pipes are presented. The resistance of the pipe material to the influence of sour gas was assessed by standard tests. To demonstrate weldability, test welds were performed and examined.

Development of High-Strength Heavy-Wall Sour-Service Seamless Line Pipe for Deep Water by Applying Inline Heat Treatment

2004 ◽  
Author(s):  
Yuji Arai ◽  
Kunio Kondo ◽  
Masahiko Hamada ◽  
Nobuyuki Hisamune ◽  
Nobutoshi Murao ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Deep Water ◽  
High Strength ◽  
Carbon Equivalent ◽  
Medium Size ◽  
Treatment Technology ◽  
Line Pipe ◽  
Hydrogen Induced Cracking ◽  
Microalloying Elements ◽  
Sour Service

High strength heavy wall sour service seamless line pipe suitable for deep water applications has been developed by Sumitomo Metal Industries, Ltd.,. This paper describes the concept of developing these pipes applying inline heat treatment technology, equipped in a newly constructed, medium-size seamless mill. Increasing hardenability through inline heat treatment achieved higher strength (X70) for heavy wall pipe (40mm) even though carbon equivalent was lower than in a conventional Q&T process. Good toughness was obtained by the control of microalloying elements such as titanium or sulfur. The produced pipe passed the hydrogen-induced cracking (HIC) test conducted according to NACE TM 0284 solution A. Controlling the microstructure and suppressing maximum hardness, utilizing the uniform quenching facility during inline heat treatment, contributed to the test result. Satisfactory data on weldability for practical use were also obtained.

Application of B-Added Low Carbon Bainite Steels to X80 UOE Line Pipe for Ultra Low Temperature Usage

2010 ◽  
Author(s):  
Taishi Fujishiro ◽  
Takuya Hara ◽  
Yoshio Terada ◽  
Shinya Sakamoto ◽  
Hitoshi Asahi
Keyword(s):  
Low Temperature ◽  
Base Metal ◽  
High Strength ◽  
American Petroleum Institute ◽  
Manufacturing Cost ◽  
Chemical Compositions ◽  
Low Carbon ◽  
Line Pipe ◽  
Low Temperature Toughness ◽  
Low Carbon Bainite

Demand for high strength line pipes is increasing because of the reduction in natural gas transportation costs of pipelines. Low temperature toughness is required for high strength line pipes. Reduction in manufacturing cost of high strength linepipes is also required in an environment where alloying cost is increasing. To meet these requirements, boron (B) addition is extremely useful because the addition of very small amounts of B remarkably improves the strength and low temperature toughness. B-added low carbon bainite (LCB) line pipes with American Petroleum Institute (API) grade X60 to X80 have been developed for several decades [1–2]. B-added LCB steels have excellent low temperature toughness, however, it is challenging to achieve excellent crack initiation resistance and crack arrestability for ultra low temperatures such as −60°C. In particular, it is very difficult to achieve both excellent Drop Weight Tear Test (DWTT) properties of base metal, and excellent Charpy V-Notched (CVN) properties of seam welds in heavier wall thickness of X80 UOE linepipe. Metallurgical concepts such as the optimum chemical compositions, Thermo Mechanical Control Process (TMCP) conditions and seam weld conditions of B-added LCB steels with API grade X80 for ultra low temperature have been proposed in order to achieve the excellent mechanical properties even in a low manufacturing cost. Based on this concept, excellent DWTT properties of base metal and CVN properties of the seam welds of API grade X80 line pipe with 25mm thickness down to –60°C were obtained.

Development of X90 and X100 Steel Grades for Seamless Linepipe Products

2014 ◽  
Author(s):  
Diana Toma ◽  
Silke Harksen ◽  
Dorothee Niklasch ◽  
Denise Mahn ◽  
Ashraf Koka
Keyword(s):  
Wall Thickness ◽  
Deep Water ◽  
High Strength ◽  
Oil And Gas Industry ◽  
Pipe Material ◽  
Line Pipe ◽  
Materials Development ◽  
Additional Tool ◽  
Technical Requirements ◽  
Steel Grades

The general trend in oil and gas industry gives a clear direction towards the need for high strength grades up to X100. The exploration in extreme regions and under severe conditions, e.g. in ultra deep water regions also considering High Temperature/High Pressure Fields or arctic areas, becomes more and more important with respect to the still growing demand of the world for natural resources. Further, the application of high strength materials enables the possibility of structure weight reduction which benefits to materials and cost reduction and increase of efficiency in the pipe line installation process. To address these topics, the development of such high strength steel grades with optimum combination of high tensile properties, excellent toughness properties and sour service resistivity for seamless quenched and tempered pipes are in the focus of the materials development and improvement of Vallourec. This paper will present the efforts put into the materials development for line pipe applications up to grade X100 for seamless pipes manufactured by Pilger Mill. The steel concept developed by Vallourec over the last years [1,2] was modified and adapted according to the technical requirements of the Pilger rolling process. Pipes with OD≥20″ and wall thickness up to 30 mm were rolled and subsequent quenched and tempered. The supportive application of thermodynamic and kinetic simulation techniques as additional tool for the material development was used. Results of mechanical characterization by tensile and toughness testing, as well as microstructure examination by light-optical microscopy will be shown. Advanced investigation techniques as scanning electron microcopy and electron backscatter diffraction are applied to characterize the pipe material up to the crystallographic level. The presented results will demonstrate not only the effect of a well-balanced alloying concept appointing micro-alloying, but also the high sophisticated and precise thermal treatment of these pipe products. The presented alloying concept enables the production grade X90 to X100 with wall thickness up to 30 mm and is further extending the product portfolio of Vallourec for riser systems for deepwater and ultra-deep water application [1, 3, 4].

Development of High Strength Material and Pipe Production Technology for Grade X120 Line Pipe

2004 ◽  
Author(s):  
Hans-Georg Hillenbrand ◽  
Andreas Liessem ◽  
Karin Biermann ◽  
Carl Justus Heckmann ◽  
Volker Schwinn
Keyword(s):  
High Strength Steels ◽  
High Strength ◽  
Point Of View ◽  
Accelerated Cooling ◽  
Pipe Production ◽  
Production Test ◽  
Low Carbon ◽  
Long Distance ◽  
Line Pipe ◽  
Economic Point

The increasing demand for natural gas will further influence the type of its transportation in the future, both from the strategic and economic point of view. Long-distance pipelines are a safe and economic means to transport the gas from production sites to end users. High-strength steels in grade X80 are nowadays state of the art. Grade X100 was recently developed but not yet utilised. The present-day technical limitations on the production of X120 line pipe namely the steel composition, the pipe forming and the welding are addressed in this paper. Production test results on X120 pipes are presented to describe the materials properties. A low carbon and low PCM steel with VNbTiB microalloying concept is used. In the plate rolling the main attention is turned to the heavy accelerated cooling. The large spring back that occurs during the U-forming step of the UOE process is one of the most complex aspects in forming X120. To handle this aspect FEM calculations were used to modify the forming parameters and to optimise the shape of the U-press tool. For optimising the existing welding procedure with respect to an avoidance of HAZ softening, a low heat input welding technology and new welding consumables were developed.

BISALLOY STRUCTURAL 60

Alloy Digest ◽  
2019 ◽  
Vol 68 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Shear Strength ◽  
Low Temperature ◽  
Yield Strength ◽  
Structural Steel ◽  
High Strength ◽  
Low Carbon ◽  
Temperature Fracture ◽  
Minimum Yield

Abstract Bisalloy Structural 60 steel (60 ksi minimum yield strength) is a low-carbon, low-alloy, high-strength structural steel exhibiting excellent cold formability and low-temperature fracture toughness. This datasheet provides information on composition and shear strength. It also includes information on forming and joining. Filing Code: SA-839. Producer or source: Bisalloy Steels Group Limited.

IN-787

Alloy Digest ◽  
1973 ◽  
Vol 22 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Low Temperature ◽  
Atmospheric Corrosion ◽  
High Strength ◽  
Heat Treating ◽  
Line Pipe ◽  
International Nickel Company ◽  
Pipe Welding ◽  
Low Temperature Toughness

Abstract IN-787 is an age-hardenable, high-strength structural steel. It is characterized by low-temperature toughness, good atmospheric corrosion resistance and excellent weldability, even under adverse field conditions such as line-pipe welding. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SA-286. Producer or source: International Nickel Company Inc..

Metallurgical Design and Development of High-Grade Line Pipe

2012 ◽  
Author(s):  
Takuya Hara ◽  
Taishi Fujishiro ◽  
Yasuhiro Shinohara ◽  
Eiji Tsuru ◽  
Naoki Doi ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Low Temperature ◽  
Cost Savings ◽  
High Strength ◽  
Design And Development ◽  
Line Pipe ◽  
Good Balance ◽  
Low Temperature Toughness ◽  
And Control ◽  
High Deformability

The application of high-strength line pipes has enabled pipelines to operate at high pressure, generating cost savings for both gas transportation and construction. In general, high-strength line pipes require crack initiation resistance and crack arrestability at low temperatures, as well as field weldability. High strength and deformability for strain-based design and excellent sour resistance are also required. Moreover, composite properties are often required for high-strength line pipes. This paper describes our progress in this field with regard to metallurgical design and development. Metallurgical design aimed at achieving a good balance between strength, low temperature toughness and deformability for strain-based design is also described from the perspectives of grain refinement, microstructure and chemical composition. Metallurgical design focused on a good balance between strength and sour resistance in limited low chemical composition is described from the perspectives of microstructure and control to chemical composition and center segregation. These efforts have led to the development of high-strength heavy wall line pipes of API X60 to X100 grades offering excellent low temperature toughness and high deformability for stain-based design, while API grades X65 to X70 with good sour resistance have also been developed.

Rosenhain Centenary Conference - 3. Materials development present and future 3.3 Development of line pipe steels

1976 ◽  
Vol 282 (1307) ◽  
pp. 305-318 ◽  
Keyword(s):  
Large Diameter ◽  
High Strength ◽  
High Yield ◽  
Low Alloy Steels ◽  
Low Carbon ◽  
High Yield Strength ◽  
Line Pipe ◽  
Materials Development ◽  
Alloy Steels ◽  
Low Carbon Bainite

The demand for large diameter gas line pipe with high yield strength and high notch toughness has led to increased research in high strength low alloy steels. Physical metallurgists have developed both a fundamental and an empirical understanding of the properties and microstructures of ferrite pearlite steels. As specifications become more rigorous, alternative microstructures (low carbon bainite or tempered bainite and martensite) are being used in line pipe. There is a definite need for metallurgists to develop a clearer understanding of the interrelationships between their properties, microstructures, and processing before these alternatives are completely accepted for use in line pipe.

Research and Development of Deep-Sea Pipeline Steel

2010 ◽  
Vol 152-153 ◽  
pp. 1492-1498
Author(s):  
Jin Qiao Xu ◽  
Bin Guo ◽  
Lin Zheng ◽  
Yin Hua Li ◽  
Le Yu
Keyword(s):  
Low Temperature ◽  
Deep Sea ◽  
Pipeline Steel ◽  
High Strength ◽  
Steel Company ◽  
Line Pipe ◽  
Iron And Steel ◽  
Company Group ◽  
Pipeline Project ◽  
Low Temperature Toughness

This paper provides a detailed description of deep-sea pipeline steel developed at Wuhan Iron and Steel Company(Group), WISCO for short. The thickness of the trial produced plates is 28mm. The chemical composition of low C-high Mn-Nb-Ti with proper content of other alloys and thermo-mechanical controlled process were applied. The results show that the deep-sea pipeline steel developed at Wuhan Iron and Steel Company has a good match of high strength, low temperature toughness and excellent deformability with fine uniform microstructure. The LSAW line pipe manufactured by JCOE method has high strength, good low temperature toughness and low yield ratio which comprehensively meet the requirements of the South China Sea Liwan pipeline project.

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