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A review on welding of high strength oil and gas pipeline

Feb 01, 2017 · It can be inferred that the microstructure and alloying of some latest grades of high strength pipeline steels - X70, X80, X90, X100 and X120 allows increasing the pipe size and capacity as compared to the earlier grades - X42, X46, X52, X56, X60 and X65. Pipe failure investigation studies are reviewed and causes of their failure are summarized. Development of ultra-high-strength linepipe steel X100 and Toggle navigation. Quicklinks. Search this site; Contact; Sites and opening hours; Room Reservation

Effects of Cooling Processes on Microstructure Evolution

With the development of pipeline industry, the pipeline steels with higher strength and plasticity, better low-temperature toughness and weldability are the main development trend. For bainitic pipeline steels, M/A constituent is the main hard phase. Although the M/A constituent can enhance the strength, the larger block-form M/A constituent can deteriorate low-temperature toughness. Electrochemical and thermodynamic study on the corrosion Mar 09, 2020 · Moreover, the tensile strength is varied from 940 to 1023 MPa and the strength is more than X120 ksi and reaches to X120 grade according to the API standards 9,10,11. Corrosion is Initiation of Stress Corrosion Cracks in X80 and X100 Pipe Dec 17, 2015 · Tests were conducted on X80 and X100 pipe steels at 95% specified minimum yield stress in NS4 solution mixed with soil using specimens machined along the transverse direction of the pipes. Crack initiation in X100 is much easier than in X80. With test time increasing from 110 to 220 days, less numerous but deeper cracks were found in both pipe steels.

Misorientation, grain boundary, texture and

Jan 10, 2018 · Microstructure and mechanical properties in high grade pipeline steel depends on the hot induction bending processing parameters such as heating temperature, bending angle, tempering temperature New development of high grade X80 to X120 pipeline steels. Mater. Manuf. Process., 26 (2011), pp. 154-160. CrossRef View Record in Scopus Google Twin-Wire Pulsed Tandem Gas Metal Arc Welding of API X80

  • AbstractIntroductionMaterials and MethodsResults and DiscussionConclusionsAcknowledgmentsTwin-Wire Pulsed Tandem Gas Metal Arc Welding process with high welding production efficiency was used to join the girth weld seam of API X80 steel linepipe of 18.4mm wall thickness and 1422 mm diameter. The macrostructure, microstructure, hardness, and electrochemical corrosion behavior of welded joints were studied. Effects of temperature and Cl concentration on the corrosion behavior of base metal and weld metal were investigated. Results show that the welded joint has good morphologyIntroduction of the delta concept for characterising pipe Aug 06, 2019 · Yoo J-Y, Ahn S-S, Seo D-H, Song W-H, Kang K-B (2011) New development of high grade X80 to X120 pipeline steels. Mater Manuf Process 26(1):154160 Article Google ScholarMechanical Properties of High-Nb X80 Steel Weld Pipes for
    • AbstractIntroductionSample Selection and Actual Manufacture Processes of Weld PipesResults of Statistical InvestigationDiscussionConclusionConflicts of InterestAuthors ContributionsAcknowledgmentsThe mechanical properties of steel pipe have great effects on the integrality and operation safety of gas transmission pipeline. In order to reduce the cost of the steel pipe, the high-Nb X80 pipeline steels with the different alloying systems have been used in the Second West-to-East Gas Transmission Pipeline Project. Nevertheless, an investigation into the effects of chemical composition on the mechanical properties of steel pipes is lacking. In this work, the chemical composition and mechanical properties oStudy and Analysis on the Tensile Test Elongation Apr 15, 2020 · Hence, the microstructure of X80 high-strength pipeline steel is different from that of the materials used to establish the Oliver formula. New Development of High Grade X80 to X120 Pipeline Steels, Mater. Manuf. Process., 2011, 26(1), p 154160.