Requirements on the metal in gas pipelines

Arabey, A. B.

doi:10.3103/s0967091210070016

Cited by 15 publications

(9 citation statements)

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“…Depending on the area of application, significant strain demand due to different types of ground movement (seismic wave propagation, lateral spread, landslide and subsidence caused by liquefaction and permanent ground movement), reflects specific requirements for line pipe material in terms of strain resistance capability [1,2]. The other main problem of pipelines is corrosion which causes different types of material loss in the body of pipe and in these cases the remaining load carrying capacity of the pipe is of crucial importance [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Ductile failure of X100 pipeline steel – Experiments and fractography

2013

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Section: Introductionmentioning

confidence: 99%

Ductile failure of X100 pipeline steel – Experiments and fractography

2013

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“…In the production of modern high-strength steels for main pipelines, along with the implementation of effective methods of thermomechanical controlled rolling [1][2][3], work is carried out on deep metal desulfurization and optimization of the chemical composition of pipe steel by reducing the concentration of expensive and scarce alloying elements due to microalloying [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. A special place among microalloying elements is boron.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Boron, Manganese and Sulfur on the Microstructure and Mechanical Properties of Pipe Steel 17G1SU

Бабенко

Смирнов

Уполовникова

2021

SSP

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The paper presents the results of the effect of boron, manganese and sulfur on the microstructure and mechanical properties of pipe steel 17G1SU. It was shown that the microstructure of boron-free steel sample containing 1.4% Mn and 0.01% S consists mainly of ferrite and a small amount of perlite. Samples microalloyed by boron are represented by a dispersed ferritic-bainitic structure. A decrease in ferrite grain size from 8.7 μm, in a comparative sample without boron containing 1.4% Mn and 0.010% S to 5.8 μm in a sample of steel containing 0.006% B, 1.6% Mn and 0.011% S, shows increasing the dispersity of the ferritic-bainitic structure. A decrease in the manganese content to 1.4, sulfur to 0.004% and an increase in boron concentration to 0.0011%, despite an increase in grain size to 6.8 μm, retain a fine-grained structure. The effect of boron, manganese, and sulfur content on the microhardness of the structural phases of the studied pipe steel samples is noted. The smallest microhardness of ferrite and perlite is observed in the base sample without boron, reaching 180 and 214 HV10, respectively. The microalloying of pipe steel containing 1.6% Mn, 0.011% S with boron is accompanied by an increase in the microhardness of the bainitic phase to 314 HV10, which increases to 400 HV10 with an increase in boron concentration to 0.011%, and a decrease in the content of manganese and sulfur to 1.4 and 0.003%. In this case, the microhardness of the ferrite phase, reaching an increase to 260 HV10, is practically independent of the content of boron, manganese, and sulfur. The mechanical properties of the experimental metal rolling with a thickness of 10 mm provide the production of rolled steel of strength class X80, without heat treatment, regardless of the content of boron, manganese, and sulfur, as a result of the formation of a finely dispersed ferrite-bainitic structure.

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“…Для производства труб, используемых для транспортировок газо-нефтепродуктов применяются малоуглеродистые низколегированные стали с ферритной, феррито-бейнитной и бейнитной структурой. Важной особенностью данных сталей является высокий уровень прочностных свойств и высокий уровень трещиностойкости [1,2].…”

Section: Introductionunclassified

“…Подобная обработка позволяет снизить металлоемкость (толщину стенки трубы) и повысить надежность строящихся магистральных трубопроводов [3]. За счет применения ускоренного охлаждения реализуется переход от феррито-перлитных микроструктур к структурам с преобладанием продуктов промежуточного превращения [2,4].…”

Section: Introductionunclassified