[email protected]

Low temperature tensile properties of line pipe

Given the expected increase in Arctic oil and gas exploitation, there is a demand for high-strength line pipe steels able to cope with the Arctic climate. The state-of-the-art of the tensile properties of API 5L steels at low temperatures is reviewed and discussed. Well-known characteristics such as an increase in strength and Youngs modulus with decreasing temperatures are confirmed. Effects of Alloy Content on Impact Toughness in X80 impact toughness reduction in X80 pipeline. It has been reported [5] that Ni element is both benefit for improving the strength and toughness, especially for impact toughness at low temperature. This is attributed to Ni element solid solution reduces the dislocation motion frictional resistance, and also increases the stacking fault energy at

Effects of Temperature and Crack Tip Constraint on

This paper studies the effects of temperature and crack tip constraint on cleavage fracture toughness of weld thermal simulated X80 pipeline steel at low temperatures. A large number of fracture toughness (as denoted by CTOD) tests together with 3D finite element analyses are performed using single edge notched bending (SENB) and tension MICROSTRUCTURAL FEATURES OF LOW-ALLOY PIPELINE This paper studies the effects of temperature and crack tip constraint on cleavage fracture toughness of the weld thermal simulated X80 pipeline steels. A large number of fracture toughness (as denoted by CTOD) tests together with 3D finite element analysis are performed using single edge notched bending (SENB) and tension (SENT) specimens at Mechanical 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 oAPI X80 Grade Electric Resistance Welded Pipe with This paper introduces X80 grade HFW pipe with excellent low temperature tough- ness, which was commercialized by microstructure improvement by the reduction effect of C contents, active use of precipitation strengthening by micro-alloy elements, and application of

    Microstructure and Toughness of Simulated Grain Coarsened

    Dec 09, 2014 · Gianetto, JA, Fazeli, F, Chen, Y, Shalchi-Amirkhiz, B, & Smith, T. "Microstructure and Toughness of Simulated Grain Coarsened Heat Affected Zones in X80 Pipe Steels." Proceedings of the 2014 10th International Pipeline Conference. Volume 3:Materials and Joining; Risk and Reliability. Calgary, Alberta, Canada. September 29October 3, 2014. X80 Steel Scientific.NetAbstract:The experiment results show that the microstructure control plays a key role for enhancing toughness of heavy thick X80 plates at low temperature, especially DWTT property.Research and Development Into Low Temperature Jul 25, 2013 · Advanced Search. In recent years the trend in oil and gas transmission pipelines has been toward higher operating pressures. This trend, while the desire to keep steel costs low, has resulted in an increased demand for large diameter heavy wall X80 with good low temperature toughness. It is well known that improving the low temperature toughness with increasing wall thickness of the pipeline