Effect of Statistical Straggling of the Yield Strength of 17G1S Pipe Steel Grade on Strength Reliability of the Main Gas Pipelines

2019 ◽  
pp. 42-47
Author(s):  
S.L. Golofast ◽  
Keyword(s):  
Yield Strength ◽  
Pipe Steel ◽  
Steel Grade ◽  
Gas Pipelines

XABO 355

Alloy Digest ◽  
2017 ◽  
Vol 66 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Yield Strength ◽  
Physical Properties ◽  
Flat Plate ◽  
Structural Steel ◽  
Tensile Properties ◽  
Impact Test ◽  
Steel Grade ◽  
Minimum Yield

Abstract XABO 355 (minimum yield strength of 355 MPa, or 51 ksi, for thicknesses up to 35 mm, or 1.4 in.) is a thermomechanically rolled structural steel. This datasheet applies to thermomechanically rolled flat plate products in thicknesses up to 60 mm (2.4 in.). This steel grade is distinguished by testing by notch-bar impact test to –20 deg C (-4 deg F) minimum. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming and joining. Filing Code: SA-777. Producer or source: ThyssenKrupp Steel Europe AG.

Effect of Microstructure and Impact Toughness, on the Character of the Destruction of Main Oil and Gas Pipelines

2019 ◽  
Vol 822 ◽  
pp. 79-86
Author(s):  
Anastasiya Y. Doroshchenkova
Keyword(s):  
Mechanical Properties ◽  
Impact Toughness ◽  
Oil And Gas ◽  
Pipe Steel ◽  
Fracture Pattern ◽  
Gas Pipelines ◽  
Metallographic Examination ◽  
Electron Scanning Microscopy ◽  
Oil And Gas Pipelines ◽  
Increased Strength

Specimens of pipe steel of increased strength grade type K56-K60, with different values of impact toughness (KCV) were investigated: a metallographic examination of the specimens’ structure was carried out by optical and electron scanning microscopy methods. The interrelation of the microstructure with mechanical properties, in particular with impact toughness and their influence on the nature of fracture pattern is established.

A Justification for Designing and Operating Pipelines Up to Stresses of 80% SMYS

2002 ◽  
Author(s):  
Martin McLamb ◽  
Phil Hopkins ◽  
Mark Marley ◽  
Maher Nessim
Keyword(s):  
Yield Strength ◽  
Oil And Gas ◽  
Large Diameter ◽  
Pipe Material ◽  
Gas Pipelines ◽  
Long Distance ◽  
Remote Locations ◽  
Pass Through ◽  
The Impact ◽  
Minimum Yield

Oil and gas majors are interested in several projects worldwide involving large diameter, long distance gas pipelines that pass through remote locations. Consequently, the majors are investigating the feasibility of operating pipelines of this type at stress levels up to and including 80% of the specified minimum yield strength (SMYS) of the pipe material. This paper summarises a study to investigate the impact upon safety, reliability and integrity of designing and operating pipelines to stresses up to 80% SMYS.

The Development and Experimental Study on High Strength and Toughness Drill Pipe Steel

2011 ◽  
Vol 287-290 ◽  
pp. 1024-1032
Author(s):  
Feng Hu ◽  
Li Hong Han ◽  
Hang Wang ◽  
Yao Rong Feng ◽  
He Lin Li
Keyword(s):  
Electron Microscopy ◽  
Yield Strength ◽  
Pipe Steel ◽  
Drill Pipe ◽  
Control Process ◽  
High Strength ◽  
Alloy Element ◽  
Deep Wells ◽  
Alloy Carbon ◽  
The Impact

With the development of oil industry, the high strength-toughness drill pipe suited to the task of sour environment and ultra deep wells would be considered more and more important. A new drill pipe steel, which was designed with the proper decrease of C content and increase of Cr, Ni, Mo, Nb and V alloy element, was developed and studied in this study. Large deformation hot rolling technology was used to obtain ultrafine grains microstructure. The results showed that the yield strength of this new drill pipe steel had reached 150ksi with the impact toughness more than 150J, which can perfectly meet the “leak-before-break” crack principle. The new low-alloy carbon steel drill pipe in the controlled yield strength grade 150ksi showing excellent sulfide stress cracking resistance and strength-toughness have been developed. Based on the observation of scanning electron microscopy and transmission electron microscopy, several kinds of carbide particles including (Nb, Mo, V)C with nanometer scale, were distributed in tempered sorbite matrix. The objective of this work was to study the relationship between carbide precipitation and strength-toughness by optimizing element design, thermo mechanical control process and heat treatment of drill pipe steel.

XABO 500

Alloy Digest ◽  
2017 ◽  
Vol 66 (6) ◽  
Keyword(s):  
Yield Strength ◽  
Physical Properties ◽  
Flat Plate ◽  
Structural Steel ◽  
Tensile Properties ◽  
Impact Test ◽  
Steel Grade ◽  
Minimum Yield

Abstract XABO 500 (minimum yield strength of 500 MPa, or 73 ksi, for thicknesses up to 16 mm, or 0.6 in.) is a thermomechanically rolled structural steel. This datasheet applies to thermomechanically rolled flat plate products in thicknesses up to 60 mm (2.4 in.). This steel grade is distinguished by testing by notch-bar impact test to –20 deg C (-4 deg F) minimum. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on forming and joining. Filing Code: SA-786. Producer or source: ThyssenKrupp Steel Europe AG.

MECASTEEL 145

Alloy Digest ◽  
2014 ◽  
Vol 63 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Yield Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Steel Grade

Abstract Mecasteel 145 is a steel grade delivered in prehardened condition (yield strength > 1000 MPa, or > 145 ksi) and available in very large dimensions (width 2 m, or 78 in.; thickness up to 635 mm, or 25 in.). This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on forming. Filing Code: SA-703. Producer or source: Industeel USA, LLC. Originally published as Alloy Digest SA-691, February 2014, revised July 2014.

Study of Texture Development and Anisotropy of Mechanical Properties of API-X80 Line Pipe Steel for Spiral-Welded Pipe

2005 ◽  
Vol 495-497 ◽  
pp. 531-536 ◽  
Author(s):  
Jin Ho Bae ◽  
Shi Hoon Choi ◽  
Ki Soo Kim ◽  
Ki Bong Kang
Keyword(s):  
Yield Strength ◽  
Pipe Steel ◽  
Rolling Direction ◽  
Plastic Property ◽  
Charpy Specimen ◽  
Electron Backscattered Diffraction ◽  
Line Pipe ◽  
Ductile Brittle Transition Temperature ◽  
Line Pipe Steel ◽  
Welded Pipe

This study has been conducted to analyze the effect of texture and microstructure on the anisotropy of yield strength and Charpy fracture toughness of an X80 line pipe steel. The texture and microstructure were investigated by X-ray diffractometer and electron backscattered diffraction (EBSD). The yield strength and impact energy were measured along 0o (longitudinal), 30o and 90o (transverse) to the rolling direction. It was found that the microstructure of the developed steel consisted of fine acicular and polygonal ferrite with small pearlite and martensite or retained austenite (MA constituents). The major components of textures were {332}<113> and {113}<110> orientations. In order to investigate the effect of both morphological and crystallographic texture on yield strength anisotropy, the prediction of the plastic property was carried out by using a viscoplastic self-consistent (VPSC) polycrystal model. The predicted anisotropy of yield strength with VPSC model assuming ellipsoidal grain shape was in a good agreement with experimental observation. EBSD results showed that the density of {001} cleavage planes of Charpy specimen, 30 degree to rolling direction, was the highest compared with that of other specimens. Therefore, the highest susceptibility to the cleavage fracture, i.e. increased ductile-brittle transition temperature, can be seen in the 30 degree direction.

One Step Further: 500 MPa Yield Strength Steel for Offshore Constructions

2002 ◽  
Author(s):  
F. Hanus ◽  
J. Schu¨tz ◽  
W. Schu¨tz
Keyword(s):  
Yield Strength ◽  
Base Material ◽  
Steel Grade ◽  
The North ◽  
Single Piece ◽  
Research Programmes ◽  
The North Sea ◽  
One Step ◽  
Haz Toughness ◽  
Minimum Yield

Essential savings in time and money can be achieved if the topside of an offshore platform can be installed in a single piece. For the projects Grane and Valhall located in the North Sea this goal could only be met by using steels with a minimum yield strength of 500 MPa. At the same time the steel should be as easily weldable as the 420 MPa TMCP steel that had become a common offshore steel grade in Norway during the last decade. Based on profound experience in TMCP and research programmes on weldability a chemical composition was selected promising to scope the requirements for base material and HAZ. A few plates were first produced and tested successfully. Excellent weldability in terms of HAZ toughness and low preheat was proven through a vast qualification programme and test welds at the yards. In the first part of the 3500 t order for Valhall the process parameters were optimised to achieve stable properties for the whole thickness range from 15 to 80 mm. The development of this steel grade S500M3z, the results and experience gained on the first deliveries shall be presented in the paper.

Experimental substantiation of the corrosion rate of pipe steel

2021 ◽  
pp. 407-411
Author(s):  
Михаил Андреевич Белостоцкий ◽  
Анатолий Михайлович Короленок
Keyword(s):  
Corrosion Rate ◽  
Pipe Steel ◽  
Experimental Studies ◽  
Steel Grade ◽  
Electrochemical Protection ◽  
Main Pipelines ◽  
17G1s Steel ◽  
Corrosion Pits ◽  
Corrosive Activity ◽  
Quantitative Indicators

Определяющее значение в развитии дефектности металла труб имеет коррозионный фактор, а также деградация механических свойств трубных сталей в процессе эксплуатации трубопроводов. Авторами приведены результаты экспериментальных исследований по оценке скорости коррозии и склонности к трещинообразованию трубных сталей, наиболее распространенных на длительно эксплуатируемых магистральных нефте- и нефтепродуктопроводах. Разработана методика определения количественных показателей коррозионно значимых параметров для обоснования вывода в капитальный ремонт трубопроводов на основе результатов натурных экспериментальных исследований скорости коррозии фрагментов трубной стали при различных условиях поляризации и коррозионной активности грунта. Объект исследования - фрагменты труб (пластины) 50×50×3 мм, изготовленные из стали марок 09Г2С и 17Г1С. Полученные результаты позволили сформулировать рекомендации по уточнению количественных критериев коррозионно значимых факторов для обоснования вывода трубопровода в капитальный ремонт: 1) необходимо учитывать марку трубной стали (установлено, что сталь 17Г1С на 20-30 % более устойчива к коррозии, чем сталь 09Г2С, особенно в части образования локальных повреждений - язв и питтингов); 2) при значениях удельного электрического сопротивления грунта менее 20 Ом⋅м скорость коррозии возрастает примерно на порядок независимо от марки стали и наличия системы электрохимической защиты. This work presents the results of experimental studies on the assessment of the corrosion rate and the cracking tendencies of pipe steels, most common in the main oil and oil product pipelines that have been used for a significant amount of time. A methodology was developed for determining quantitative indicators of corrosion-significant parameters to justify the overhaul of main pipelines based on the results of field experimental studies of the corrosion rate of pipe steel fragments under various conditions of polarization and corrosive activity of the soil. The object of the study is pipe fragments (plates) with the dimensions of 50×50×3 mm, made of steel with the grades 09G2S and 17G1S. The results made it possible to formulate recommendations for refining the quantitative criteria of corrosion-significant factors to justify the overhaul of the pipeline: 1) it is necessary to take into account the pipe steel grade (it was found that 17G1S steel is 20-30 % more resistant to corrosion than 09G2S steel, especially in the formation of local damages - corrosion pits and pittings); 2) at values of specific soil resistance less than 20 Ohm⋅m, corrosion rate increases by about an order, regardless of the steel grade and the usage of an electrochemical protection system.

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