Electronic and microscopic researches of dislocation structure of metal near crack top

Nasibullina, O.A.; Tyusenkov, A. S.

doi:10.1088/1757-899x/537/2/022023

Cited by 16 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To estimate SDS, pipeline piping of three devices, technologically connected to each other, was chosen. Pipeline piping is designed to remove light fractions and decomposition gases from the top of the vacuum column to barometric condensers, is connected to the following equipment by means of flange connections and is fixed using fasteners [7][8][9][10]. The pipeline operates under vacuum and consists of straight sections with dimensions of 27310 mm, 42610 mm and 53010 mm, seamless steeply bent branches, as well as concentric transitions.…”

Section: Methodsmentioning

confidence: 99%

Investigation of stress-strain state of pipeline hoist taking into account installation displacements

Kulakov

Рубцов

Abushakhmin

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Stress-deformed state of a technological equipment at oil and gas refinery facilities has an ambiguous character and may depend on such factors as, for instance, operating conditions, design feature, material degradation rate, different deviations during assembly and installation etc. Moreover, the maximum level of working stress can be changed either according to linear or nonlinear laws depending on operating machinery and determining parameter of technical condition. This aspect is highly important at forecasting the further safe operation. In a modern world it is very important and urgent to build up equipment model and its parts which are digital analogue of a real facility. Application of such digital models allows to forecast future behavior of facility at the present and for the future depending on change rate of specific parameters, to determine positive and negative schemes from high stress formation point of view in the structure. Such digital model can be applied on each stage of an equipment service life and make forecasts of an equipment transfer to critical state, to determine possible reasons of changes and to carry out prevention activities. This article considers the stress-deformed state of a technological pipe operated under vacuum at different locations of its fixation on nozzle pipes of technological apparatuses.

show abstract

Section: Methodsmentioning

confidence: 99%

Investigation of stress-strain state of pipeline hoist taking into account installation displacements

Kulakov

Рубцов

Abushakhmin

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…In most cases, actual corrosion processes are local. It was established that for the occurrence of SCC in stainless steels it is necessary to have an active -passive state of metal [7][8][9][10][11][12][13][14][15][16][17]. However, it is not clear at all how disruption of the passive state of stainless steels, manifested, for example, in the form of pitting, affects the onset of corrosion cracks in chlorocarbon media.…”

Section: Experiments Techniques and Materialsmentioning

confidence: 99%

Influence of Anodization Process on Improvement of Corrosion Resistance of Tubing from Aluminium Alloys

Nasibullina

Pechenkina

2023

MSF

View full text Add to dashboard Cite

Full functioning of wells in oil and gas fields is impossible without the use of tubing. Main function of tubing is transportation of gases and liquids produced in productive zone to well surface. In addition, tubing acts as a kind of insulator that protects the gas and liquid transported through them from the walls of the well, and also prevents the occurrence and development of corrosion, deposits of paraffin and asphaltene on casing pipes. The tubing pipe placed in the well is also necessary in order to ensure the carrying out of downhill and repair work, which is regularly necessary. Standard tubin g (tubing) as a result of technological difficulties does not undergo a strengthening operation. When manufacturing tubing and locks to them from alloyed steels, the main attention is paid to improving mechanical properties, which is achieved by thermal and chemical-thermal treatment. However, the practice of operating tubing shows that the introduction of these measures does not solve the issue of reliability, since threaded connections for the coupling and nipple remain vulnerable sections of tubing. Tubing (tubing) during its operation experiences significant loads and is in constant contact with aggressive media, which leads to serious requirements for their quality. The possibility of replacing its production from alloyed steels with aluminum alloys, for example, AlCuMg2 will facilitate the design by 2.5 times, prevent the tendency to stress corrosion cracking (SCC) in a hydrogen sulfide-containing medium and eliminate inhibitory protection. The main disadvantage of aluminum alloys is the tendency to pitting corrosion. It is possible to improve the protective properties of the passive film on aluminum alloys by anodizing.

show abstract

“…For steel with 9% nickel content, the microstructure of the ringed zone in the welded joint will always be martensitic, even at very low cooling rates (in air) [10][11][12][13][14][15].…”

Section: Investigation Of the Process Of Nickel Impact On Steelmentioning

confidence: 99%

Welding Technology for Liquefied Natural Gas Tanks

Zaripov

Yalchigulov

2022

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Liquefied natural gas (LNG) is of great importance in the energy segment of the economy. Natural gas, has a higher calorific value, better fuel efficiency and is more environmentally friendly, thereby gaining more importance compared to oil and coal. Not only does LNG offer greater flexibility in supply, it also has cost advantages for transportation starting from a distance of 2,000 km (at sea) and 4,000 km (on land) respectively. Consequently, the LNG market will grow in the coming decades compared to two other fossil sources - oil and coal. To use natural gas, it is necessary to create safe and economically profitable transportation routes from natural gas deposits to end users. One possibility is to transport gas in a liquefied state, at low temperatures. To ensure safe and reliable storage of liquefied gas at minus 163 ° C, good physical and mechanical properties of the base material and weld (corresponding tank system) are required. To meet these high requirements, appropriate welding methods and welding materials are selected. The paper presents an analysis of activities on the development of new welding materials and improvement of welding technologies for the construction of LNG tanks.

show abstract

Electronic and microscopic researches of dislocation structure of metal near crack top

Cited by 16 publications

References 11 publications

Investigation of stress-strain state of pipeline hoist taking into account installation displacements

Investigation of stress-strain state of pipeline hoist taking into account installation displacements

Influence of Anodization Process on Improvement of Corrosion Resistance of Tubing from Aluminium Alloys

Welding Technology for Liquefied Natural Gas Tanks

Contact Info

Product

Resources

About