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Добірка наукової літератури з теми "Pipe mill"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Pipe mill"

1

Goncharuk, Aleksander V., Viktor A. Fadeev, and Maksim V. Kadach. "Seamless Pipes Manufacturing Process Improvement Using Mandreling." Solid State Phenomena 316 (April 2021): 402–7. http://dx.doi.org/10.4028/www.scientific.net/ssp.316.402.

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Анотація:
The paper discusses the specific aspects of hot rolled seamless pipes manufacture using pipe rolling plants including screw-rolling mills. The method of accuracy enhancement of pipe dimensions, as well as external and internal surface quality improvement, is proposed. The article specifies the results of computer and physical modeling of the pipes mandreling process. The application of the mandreling process within the cage using different diameter mandrels is shown. We managed to decrease the typical mark caused by the metal deformation, due to the screw-rolling mill and to manufacture pipes with more accurate dimensions, as a result of the mandreling process modeling. The results of the physical experiment on mandreling the shell pierced at the screw-rolling mill showed a positive effect from the process of hollow billet cold treatment using the mandrel.
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2

Pavlov, D. A., Aleksandr Aleksandrovich Bogatov, and E. A. Pavlova. "Modernization of Hot-Rolled Tubes Rolling Method." Solid State Phenomena 265 (September 2017): 1048–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.265.1048.

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Анотація:
A new method of hot-rolled pipes rolling on the automatic tandem mill is suggested. It consists of two rolling stands. This method allows achieving the rough pipe preovalisation before reaching the automatic mill. The rough pipe preovalisation provides even groove filling and the decrease of pipe wall thickness variation. The rough pipe preovalisation will allow increasing the elongation ratio from 1.5 to 2.0 on the lengthwise rolling stand no. 1 and decreasing the elongation ratio on the piercing mill, therefore the chance of rolling skin formation on the external surface of the pipe is decreased. The way to reduce the probability of the formation of a guide mark defect due to the kinematic tension during rolling on a stub mandrel with rough tube preovalisation is investigated. The influence of the kinematic tension factor on the pipe forming in the groove taper at a lengthwise rolling with rough tube preovalisation is explored.
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3

Rakhmanov, S. R., and V. V. Povorotniy. "Complex study of deformation mode of working stand of pipes cold rolling mill." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information, no. 9 (September 25, 2018): 93–100. http://dx.doi.org/10.32339/0135-5910-2018-9-93-100.

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Анотація:
Elaboration of main concepts of working stands reconstruction, providing an increase of their operation strength and improving of rolled pipes quality and at the same time a decrease of metal intensity is an actual task. Solving of the task will result to a great extent in expanding of technological possibilities and increasing of productivity pipe cold rolling mills.Results of complex study of deformation mode of working stands of pipe cold pilger mills of different designs presented. Influence of working stands parameters both existing and of rational designs on quality of rolled pipes determined. The study determined, that thanks to application of roller installation with ring roll passes and new bearings an expansion of technological possibilities of ХПТ 32 mill reached. Increase of rolled pipes quality was reached by utilization in the drive line of ХПТ 32 mill a modernized working stand of rational design, which has a high operation reliability and an increased rigidity.
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4

Katsumura, T., Kazutoshi Ishikawa, Atsushi Matsumoto, Shunsuke Sasaki, Yasushi Kato, and Jun Yanagimoto. "Development of Finite Element Analysis Model for Plug Mill Rolling." Key Engineering Materials 622-623 (September 2014): 899–904. http://dx.doi.org/10.4028/www.scientific.net/kem.622-623.899.

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Анотація:
In the seamless pipe rolling process, the pipe wall thickness is largely determined at the mandrel mill or plug mill. It is possible to obtain the target thickness at these mills by defining the gap of a grooved roll and an inside tool such as a plug. However, the thickness of the free deformation part, which is not in contact with the roll and tool, had generally been estimated by experimental techniques. Although a number of analytical studies of mandrel mill rolling had been reported, few reports had examined plug mill rolling. Therefore, in this research, a finite element analysis model for plug mill rolling was developed by extending the rigid plasticity finite element model "Computational Rolling Mill (CORMILL)." Good agreement between the calculated results and experimental results was obtained for the wall thickness, and it was found that the thickness of the flange part decreases with reduction of the wall thickness at the grooved bottom. These results suggested that the wall thickness distribution of rolled pipes can be controlled by using a suitable inside tool and roll shape in each rolling pass, and the necessary shapes can be obtained by using the newly-developed model.
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5

Karmiadji, Djoko W., and Gery Setiadi. "ANALISIS PEMBUATAN PIPA BAJA SISTEM DUA BAGIAN LAS ASTM A139 DENGAN MENGGUNAKAN METODA LSAW = MANUFACTUR ANALYSIS DUAL SEAM WELD STEEL PIPE ASTM A139 BY USING LSAW METHODE." Material Komponen dan Konstruksi 14, no. 1 (June 1, 2014): 29. http://dx.doi.org/10.29122/mkk.v14i1.1652.

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Анотація:
One of the main components of the manufacture of steel pipe is in the form of plate steel sheet, slab or hot roll coil, which of these materials may be made for various types of pipes, among others, seamless, Electric Wire Resistance, Spiral and Longitudinal pipes.The main material used welding steel pipe is a steel plate or hot roll coil. Material procurement dependence becomes an obstacle for welding steel pipe mill, which at this moment in our country's steel mills have not been able to produce material of diameter of 24 "steel pipe used primarily in the oil and gas sector.In this research, the analysis of welded steel pipe manufacture using local plate material consisting of two sections then welded with GMAW and SMAW welding type, where the manufacture of welded steel pipe with dimensions Ø 28 "x 8.7 mm x 12.000 mm is done using the LSAW (Longitudinal Sub Merged Arc Welding) method. Mechanical testing and inspection conducted in accordance with ASTM A139.Based on the analysis of the results of testing and inspection, it can be concluded that the method of manufacture of welded steel pipes using dual seam weld longitudinal submerged arc welding compliant as required in the standard ASTM A139.Keywords : steel pipe, dual seam weld, ASTM A139Abstrak Salah satu komponen utama dari pembuatan pipa baja adalah baja berupa plat lembaran, slab atau hot roll coil, dimana dari bahan ini dapat dibuat berbagai jenis pipa antara lain pipa seamless, pipa Electric Wire Resistance, pipa Spiral, dan Pipa Longitudinal.Material utama pipa baja las yang digunakan adalah plat baja atau hot roll coil. Ketergantungan pengadaan material menjadi kendala bagi pabrik pipa baja las, dimana pada saat ini pabrik baja di negara kita belum mampu memproduksi bahan pipa baja berdiameter lebih dari 24” terutama digunakan pada sektor minyak dan gas.Pada penelitian ini dilakukan analisis pembuatan pipa baja las dengan menggunakan bahan plat lokal yang terdiri dari dua bagian kemudian di las dengan jenis las GMAW dan SMAW, dimana pembuatan pipa baja las dengan dimensi Ø 28” x 8,7 mm x 12.000 mm dilakukan menggunakan metoda LSAW (Longitudinal Sub Merged Arc Welding). Teknik pengujian dan pemeriksaan dilakukan dengan mengacu pada standar ASTM A139.Berdasarkan analisis hasil pengujian dan pemeriksaan, dapat di simpulkan bahwa metode pembuatan pipa baja las menggunakan metode dual seam weld longitudinal submerged arc welding memenuhi persyaratan standar sebagaimana yang dipersyaratkan pada standar ASTM A139.Kata kunci: pipa baja, las dua bagian, ASTM A139
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6

Rakhmanov, S. R. "Some peculiarities of the process of the pipe purse firmware on the firmware." Metallurgicheskaya i gornorudnaya promyshlennost, no. 1 (2019): 31–39. http://dx.doi.org/10.33101/s001-1700087840.

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Анотація:
Purpose. Conducting research aimed at choosing the rational modes of flashing the tubular billet by stabilizing the dynamic characteristics of the drive power line of heavy-duty piercing mills TPA. Methodology. The dynamics of the power line of the piercing mill of the pipe-rolling unit (TPA) are considered, taking into account the peculiarities of the behavior of the spindle hinges and the mechanism for setting the work rolls. Findings. The differential equation of motion of the line of the main drive of the piercing mill is composed and its numerical solution is given. An adapted three-mass dynamic model of the system is considered and a solution is obtained using the software Solid Works IT Simulation X. The basic conditions for the occurrence of unstable dynamic phenomena in the fieldline and the installation mechanism of the piercing mill rolls are formulated. It is shown that the unstable dynamics of the system are one of the main reasons for the discrepancy between the results of well-known theoretical, experimental studies and pipe thickness measurement at TPA 350 piercing mills. Originality. The main causes of the emergence of parametric oscillations in the drive of the working stand of the piercing mill, the installation mechanism of the work rolls in connection with the mechanism of formation of the thin-wall thickness of pipes are established. The areas of stability of the system’s functioning are determined depending on the operating modes and the angle of feed of the work rolls, taking into account the spatial position of the elements of the spindle device. The necessary and sufficient stability conditions for the joint stable functioning of the power line elements of the piercing mill are formed. Practical value. To stabilize the processes for flashing the tubular billet, a scheme has been proposed for upgrading the spindles of the main drive and the mechanism for installing the work rolls of the piercing mill No. 1 of TPA 350. The results are applicable to similar helical rolling mills. Keywords: firmware, billet, mill, pipe, uneven stroke, varying thickness, dynamics, drive, roll, oscillations, spindle, Cardan, hinge, moment of inertia, rigidity, drum, installation mechanism, stability.
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7

Orlov, G. A., A. G. Orlov, and E. A. Kungurov. "A review of pipes reduction methods aimed at end longitudinal different-walled decreasing." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, no. 1 (February 2, 2019): 86–94. http://dx.doi.org/10.32339/0135-5910-2019-1-86-94.

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Анотація:
Formation of incrassate pipes end is one of main drawbacks of pipes reducing with tensioning method. Therefore, the matter of perfection of reducing mills designs, rollers passes, rolling regimes aimed at end shearing decreasing is very actual. A review of steel pipes hot rolling methods at multi-stand reduction-tensioning mills was carried out, aimed at elaborating of measures for decreasing of end longitudinal different-walled. Techniques of pipe end parts rolling considered, including control of rotary speed regimes of adjacent stands rollers; changing of distance between stands; increasing of pipe end parts temperature to facilitate their tapering; increasing inter-stands tension at the expense of magnetic field application. Also such techniques were considered as application of a short fixed mount in the first mill stand; use of endless reducing; use of idler stands, making breaking down effect and increase of tension. Analysis results of the patent search with utilization of internet-resources showed, that a method of tension increasing at the expense of rollers rotation speed control at pipe end parts rolling is the most acceptable method of pipes incrassate ends length and end shearing decreasing. An actuality of further studies of the elaboration of modified reducing mills speed regimes was noted, aimed at pipes incrassate ends length decreasing depending on their geometry, steels grades, assortment of produced pipes and other technological factors.
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8

Sobolenko, Oleksandr, Petro Drozhzha, Nataliia Dorosh, and Lina Petrechuk. "ACCURACY WALL SICKNESS OF HOT-DEFORMED PIPES STATISTICAL ANALISIS." Modern Problems of Metalurgy, no. 23 (March 27, 2020): 113–20. http://dx.doi.org/10.34185/1991-7848.2020.01.11.

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Анотація:
Pipe-rolling units with an automatic mill are a aggregate production complex that produces hot-rolled pipes of various sizes. The technological process of seamless pipes production, has many stages: flashing the billet into a sleeve, longitudinal rolling in gauge, running in a oblique rolling mill, calibrating and reducing the diameter. Each stage significantly affects the accuracy of the geometric dimensions of the pipes. One of the main parameters characterizing the accuracy of the pipes is their transverse difference namely the size and the nature of the distribution of the pipe wall thickness in the cross section. A significant reserve for saving metal is increasing the accuracy of seamless pipes to avoid different pipe wall thickness. Different pipe wall thickness makes it difficult to get quality pipe screw-thread.The conditions of metal deformation at an injection molding machine with an automatic machine do not exclude the presence of fluctuation of the pipe wall thickness. The best characteristic of the accuracy of finished pipes will be the knowledge of quantitative indicators of the transverse difference of their end sections. The purpose of this work is to determine the variation in wall thickness of hot-rolled casing by means of mathematical statistics methods.The use of statistical data processing methods makes it possible to predict the seamless pipe difference indicator. A statistical analysis of the wall thickness indicator of the end sections showed a high ratio of wall thickness symmetry. An effective way to minimize the symmetric difference component is to optimize the deformation modes along the pipe wall. In this case, a graphical analysis of the distribution of wall thickness showed that the actual difference varies in stochastic dependence. To clarify the general form of the random periodic component of such a dependence, it is advisable to apply methods of harmonic analysis, which will allow us to develop a mathematical model for determining the accuracy of pipes.
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9

Rakhmanov, S. R. "Dynamics of exit section of automatic mill of pipe rolling line." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 77, no. 2 (February 25, 2021): 175–86. http://dx.doi.org/10.32339/0135-5910-2021-2-175-186.

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Анотація:
Nonuniformity of pipe wall thickness is one of significant indices, determining quality of hot-rolled seamless pipes. One of the reasons of increased nonuniformity arising is dynamics of exit section mechanisms of pipe rolling line (PRL). Results of study of mandrel holding mechanism dynamics of PRL presented. Dynamic models of exit section, accounting parameters of technological process and inertia of a rolled hollow billet elaborated, which enabled to determine the character of dynamic processes at the exit section of PRL automatic mill. Differential equations of exit section elements motion at the exit section of PRL automatic mill were made up. The solution of the differential equations system was obtained in a numerical form by application of Runge‒Kutta method for correspondent dynamic models of exit section based on the example of calculations for ТПА-350 automatic mill. The pattern of dynamic processes arising at the exit section was specified at realization of the whole technological process of a hollow billet rolling at automatic mill, taking into consideration alternative action from the side of deformation center and mass of the rolled hollow billet. It was shown, that the specified solution of the task for three advanced dynamic models of mechanical system considerably differs from those of the known mathematical models. It was established, that the dynamics of the mandrel holding mechanism of ТПА-350 automatic mill equivalently form the mechanism of finished pipes geometry forming. Analysis of dynamic models of the mill exit section enabled to select the necessary technological and dynamic parameters of the mechanical system, to determine stable modes of hollow billets rolling at the ТПА-350 automatic mill. Results of the study of dynamics of exit section ТПА-350 automatic mill presented. A scheme of modernization of the exit section ТПА-350 automatic mill proposed, which enables to realize rational modes of operation accounting level of mechanical system dynamics and to control quality (geometric parameters) of the rolled pipes.
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10

Pasechnik, N. V., N. A. Tselikov, A. I. Grinshpun, G. A. Furlender, and A. V. Chekulaev. "Grooving mill for pipe-heating department." Steel in Translation 37, no. 6 (June 2007): 536–39. http://dx.doi.org/10.3103/s0967091207060150.

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Більше джерел

Дисертації з теми "Pipe mill"

1

Гопка, Олександр Юрійович. "Трубний млин 4.6х10 з модернізацією корпусу". Master's thesis, Київ, 2018. https://ela.kpi.ua/handle/123456789/26951.

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Анотація:
Метою роботи є пошук варіантів модернізація корпусу трубного млина в літературних джерелах і патентах. В даній роботі розглядається модернізація футеровки барабану трубного млина, яка забезпечує підвищення ефективності подрібнення за рахунок ступінчатої футеровки. Також було розглянуто модернізацію корпусу яка забезпечує покращення теплового режиму в робочій камері.Під час роботи було проведено параметричні та кінематичні розрахунки млина та розрахунки на міцність окремих його вузлів. Виконані креслення вузлів, загального вигляду. Було розроблено правила з техніки безпеки на виробництві, Розроблено систему автоматизації процесу помелу в трубному млині, а також рекомендації з технології монтажу та експлуатації машини. Були розробленні програми для автоматизованого виконання креслень вузлів трубного млина, в результаті були отримані 3D моделі. Отриману 3D модель використали для проведення розрахунків на міцність в системі Ansys. Виконані розрахунки, а також модернізації дипломної роботи можна використовувати для роботи з подальшим вдосконалення трубних млинів.
The aim of the work is to search for options for upgrading the body of the pipe mill in the literature and patents. In this paper, we consider the modernization of the lining of the drum of the tube mill, which provides an increase in the efficiency of grinding by means of a stepped lining. It was also reviewed the modernization of the housing which provides improved thermal conditions in the working chamber. During the work, parametric and kinematic calculations of the mill and strength calculations of its individual nodes were carried out. Completed drawings of nodes, general view. Was developed rules on safety in production, developed a system for automation of the grinding process in a tube mill, as well as recommendations on the technology of installation and operation of the machine. Programs were developed for automated execution of pipe mill assembly drawings, and 3D models were obtained as a result. The resulting 3D model was used to perform strength calculations in the Ansys system. This pipe mill can be used for grinding asbestos cement. Calculations are made, as well as the modernization of the thesis can be used for work with the subsequent improvement of pipe mills.
Целью работы является поиск вариантов модернизация корпуса трубной мельницы в литературных источниках и патентах. В данной работе рассматривается модернизация футеровки барабана трубной мельницы, которая обеспечивает повышение эффективности измельчения за счет ступенчатой футеровки. Также была рассмотрена модернизация корпуса которая обеспечивает улучшение теплового режима в рабочей камере. Во время работы было проведено параметрические и кинематические расчеты мельницы и расчеты на прочность отдельных его узлов. Выполнены чертежи узлов, общего вида. Было разработаны правила по технике безопасности на производстве, Разработана система автоматизации процесса помола в трубном мельнице, а также рекомендации по технологии монтажа и эксплуатации машины. Были разработаны программы для автоматизированного выполнения чертежей узлов трубного мельницы, в результате были получены 3D модели. Полученную 3D модель использовали для проведения расчетов на прочность в системе Ansys. Данную трубную мельницу можно использовать для измельчения асбестоцемента. Выполнены расчеты, а также модернизации дипломной работы можно использовать для работы с последующим совершенствования трубных мельниц.
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2

Rai, Yogendra P. J. S. "A critical evaluation of wastewater generation and treatment and the development of an integrated wastewater management system (a case study of the CORUS 42" pipe mill)." Thesis, University of Sunderland, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409159.

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3

Van, De Gevel Saskia L., Justin L. Hart, Henri D. Grissino-Mayer, and Kenneth W. Robinson. "Tree-Ring Dating Of Old-Growth Longleaf Pine (Pinus Palustris Mill.) Logs From An Exposed Timber Crib Dam, Hope Mills, North Carolina, U.S.A." Tree-Ring Society, 2009. http://hdl.handle.net/10150/622604.

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Анотація:
On 26 May 2003, intense rainfall from a series of thunderstorms in eastern North Carolina caused flooding that eventually destroyed the concrete dam in Hope Mills, draining Hope Mills Lake, and revealing a formerly submerged and buried structure that was identified as a timber crib dam. Inspection revealed these logs to be old-growth longleaf pines, which are now rare on the coastal plain landscape. Our primary objective was to develop a new multi-century longleaf pine tree-ring chronology by crossdating the tree rings from sections extracted from logs in the crib dam with an anchored tree-ring chronology created from nearby living longleaf pine trees. We also examined the climatic response in the longleaf pine trees to evaluate their potential for reconstructing climate. Using tree-ring measurements obtained from old-growth longleaf pines found at a nearby church, we were able to date the rings on 21 series representing 14 logs from the crib dam, spanning the years 1597 to 1825. Distorted sapwood in many of the logs prevented us from finding absolute cutting dates and lessened the strength of correlation during the period of overlap between the church series and crib dam series. Human disturbances, specifically related to the naval stores industry, likely influenced the growth-ring patterns of the crib dam pine samples, as well. Correlation analyses between the longleaf pine chronology and temperature, precipitation, Palmer Drought Severity Indices, and North Atlantic sea surface temperatures showed a significant response to cool and wet spring months.
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4

Young, Michael Joseph. "Effects of paper mill sludge on tree growth and competition in young red pine plantations." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-12052009-020055/.

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5

Fan, Mengyuan. "EFFECTIVENESS OF PRE-RINSE DURING IN-PLACE CLEANING OF STAINLESS STEEL PIPE LINES." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1398696323.

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6

Bakke, Olaf Andreas. "Jack pine (Pinus banksiana Lamb.) pollen effects on jack pine and black spruce (Picea mariana (P. Mill.) B.S.P.) seed germination and seedling growth." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ42997.pdf.

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7

Qureshi, Mansoorul-Haq. "Floating plug drawing of mild steel tubes." Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252933.

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8

Battaglia, Michael Anthony. "The Influence of Overstory Structure on Understory Light Availability in a Longleaf Pine (Pinus palustris Mill.) Forest." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/35411.

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Анотація:
Understory light environments are inherently heterogeneous and therefore difficult to characterize. Numerous methods to measure understory light have been assessed in closed-canopied forests; however, the reliability of these methods has not been addressed for open-canopied forests. Therefore, the first objective of this study, presented in Chapter 3, was to test the accuracy and precision of various light measurement techniques at different time scales and sky conditions. The methods assessed performed differently depending on the sky condition and time of year when the sample was taken. To estimate annual photosynthetic photon flux density transmittance (annual %PPFD), the use of a 10-minute average of PPFD measured on an overcast day (%PPFDovercast) was effective, but accuracy decreased with decreasing solar altitude (ie season change). Hemispherical photographs used to estimate weighted canopy openness and gap fraction were effective methods, but gap light index (GLI) also derived from hemispherical photographs performed better. Accuracy of daily %PPFD estimates using %PPFDovercast, weighted canopy openness, and gap fraction were strongly affected by solar altitude and sky condition. Gap light index was very effective in estimating daily %PPFD for all sky conditions and time periods. The second objective of this study, presented in Chapter 4, was to characterize the relationship between canopy structure and spatial distribution of light by using three replicates of one uncut treatment and three harvest treatments: single tree, small gap (0.1 ha), and large gap (0.2 ha). Each harvest retained similar residual basal area but with different spatial patterns of the residuals, ranging from uniformly dispersed (single tree) to different degrees of aggregation (small and large gap). Average stand level light availability increased 12-22% when the same residual basal area of trees was distributed in clusters versus a uniform distribution. The variation of light availability increased as stands became more aggregated and larger amounts of the variation was explained by the spatial pattern of the canopy structure. Spatial autocorrelation range was twice as large in the small gap harvest then the other harvest treatments. It is suggested that seedling growth response to these differences in spatial patterns of light may differ between the different harvests.
Master of Science
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9

Wight, Georgina DeWeese, and Henri D. Grissino-Mayer. "Dendrochronological Dating of an Antebellum Period House, Forsyth County, Georgia, U.S.A." Tree-Ring Society, 2004. http://hdl.handle.net/10150/262616.

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We examined tree rings from cross-sections of shortleaf pine (Pinus echinata Mill.) timbers extracted from a house in Forsyth County, Georgia, that was reportedly built in the mid-19th Century during the Antebellum Period (pre-1860). Our goals were to (1) determine the probable construction year for the house to help assess its possible historical significance, and (2) create a new long-term reference chronology for the northern Georgia area where such chronologies are lacking. Sections of shortleaf pine were removed from the structure during a renovation project in 2001. Sixteen sections were used to build a floating tree-ring chronology 217 years in length from series that crossdated conclusively with other series both graphically via skeleton plots and statistically via COFECHA. We then statistically evaluated the probable absolute temporal placement of this chronology using several regional tree-ring chronologies from the southeastern U.S. A statistically significant (p , 0.0001) correlation between our chronology and a shortleaf pine chronology from Clemson, South Carolina, anchors our chronology between 1652–1868. Two missing rings are probable in the early portion of our chronology, but we currently do not have a sufficient number of samples to conclusively identify their exact placement. No cluster of outermost rings was found to support the reported construction date of 1851, although the outermost rings on 13 of 16 samples dated before 1851. This new chronology could aid further dating of wood from archaeological sites and historical structures, and establish an initial data set that could eventually provide important new insights about the climate of northern Georgia during the 17th–19th Centuries.
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10

Tozkar, Ozge Cansu. "Comparative Sequence Analysis Of The Internal Transcribed Spacer 2 Region Of Turkish Red Pine (pinus Brutia Ten.) And Natural Aleppo Pine (pinus Halepensis Mill.) Populations From Turkey." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/2/12608313/index.pdf.

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ABSTRACT COMPARATIVE SEQUENCE ANALYSIS OF THE INTERNAL TRANSCRIBED SPACER 2 REGION OF TURKISH RED PINE (Pinus brutia TEN.) AND NATURAL ALEPPO PINE (Pinus halepensis MILL.) POPULATIONS FROM TURKEY Tozkar, Ö
zge M.S., Department of Biology Supervisor: Prof. Dr. Zeki Kaya April, 2007, 107 pages Turkish red pine (Pinus brutia) is wide-spread and an important forest tree species in Turkey, occurring mainly in southern, western and north-western Turkey and as small isolated populations in the Black Sea region. Aleppo pine (Pinus halepensis) has naturally found only in Adana and Mugla provinces as small population in mixture with Turkish red pine. Although Turkish red pine and Aleppo pine are morphologically different, Turkish red pine has been regarded as subspecies of Aleppo pine by some taxonomists due to occurrence of natural hybridization between these two species. However, the phylogenic relationship between these species needs to be explored further. In the present study, by sampling overlapped populations of both species from Mugla and Adana provinces (4 populations of Turkish red pine and 3 populations of Aleppo pine), internal transcribed spacer (ITS) region of ribosomal DNA were comparatively studied with sequence analysis. Although ITS1, 5.8s and ITS2 regions of ribosomal DNA were studied with ITS primers, only ITS2 region was successfully amplified with polymerase chain reaction (PCR). The complete data set for this region was analysed using MEGA3.1 and Arlequin softwares. Analysis of molecular variance (AMOVA) demonstrated the highest genetic differentiation between Turkish red pine and Aleppo pine in Mugla with 100 percentage of variation. AMOVA analysis also indicated the possibility of low-level migration of genes between Turkish red pine and Aleppo pine populations in Adana with 50.65 percent of molecular variance. Haplotype comparison revealed that two major haplotypes were represented Based on the results of ITS2 region sequence analysis, Turkish populations of Aleppo pine and Turkish red pine populations could not be fully differentiated. In Mugla province Turkish red pine and Aleppo pine revealed more differentiation due to reproductive isolation. But in Adana province, two species shared more common genetic background due to possible hybridization. Since ITS2 region of nuclear ribosomal DNA revealed a few variable and parsimony informative sites for both species, thus, only ITS2 region of ribosomal DNA does not appear to be sufficient for fully resolving genetic relationships between Turkish red pine and Aleppo pine populations. Further studies including ITS1 and 5.8s regions of ribosomal DNA and populations included from major Aleppo pine distribution areas will be useful to understand the evolutionary relationship between Aleppo pine and Turkish red pine populations in Turkey.
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Книги з теми "Pipe mill"

1

B, Clark E., and ASME Gas Pipeline Safety Research Committee., eds. History of line pipe manufacturing in North America. New York: American Society of Mechanical Engineers, 1996.

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2

Mii͡usskiĭ, R. A. Ėkonomicheskoe razvitie trubnogo zavoda: Problemy i opyt upravlenii͡a. Moskva: Metallurgii͡a, 1985.

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3

Dudarʹ, I. N. Snizhenie ėnergozatrat pri termoobrabotke zhelezobetonnykh trub. Kiev: Gol. izd-vo izdatelʹskogo obʺedinenii͡a︡ "Vyshcha shkola", 1985.

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4

Applegate, Marilyn Nagele. Lock, stock, and boards: The Harris Pine Mills story. Hagerstown: Review and Herald Publishing Association, 2014.

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5

Mulley, Felicia Thibeault. Pine Grove Mills: History of a hometown, 1801-2001. [Pine Grove Mills, Pa.]: Pine Grove Mills Community in Action Foundation, 2001.

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6

Barbarick, K. A. Pine Ridge zeolite and Fort Hall mill shale P effects on sorghum-sudangrass. [Fort Collins, CO]: Colorado State University, 1991.

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7

Howard, Andrew F. Log grades and lumber yields for lodgepole pine sawn at an interior board mill. Vancouver, B.C: Forest Economics and Policy Analysis Research Unit, University of British Columbia, 1990.

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8

Allen, Larry. Effects of acetone extractives in grey-stage mountain pine beetle-killed lodgepole pine on kraft mills. Victoria, B.C: Pacific Forestry Centre, 2010.

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9

Zimin, ed. Pipi fang pi pi: Wen, tu Bilite Mile ; fan yi Lin Liang. Taibei Xian Xindian Shi: San zhi san wen hua shi ye gu fen you xian gong si, 2003.

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10

Yalçin, Soner. Bay Pipo: Bir MİT görevlisinin sıradışı yaşamı, Hiram Abas. Güneşli, İstanbul: Doğan Kitapçılık, 1999.

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Частини книг з теми "Pipe mill"

1

Maretskaya, V. V., and A. V. Zaytsev. "Assurance of Quality Characteristics for Electric Weld Pipe Mill Roll." In Proceedings of the 4th International Conference on Industrial Engineering, 1829–37. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95630-5_196.

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2

Pereira, Cátia, Itziar A. Montalbán, Sandra Isabel Correia, Jorge Canhoto, and Paloma Moncaleán. "Aleppo pine Pinus halepensis Mill." In Step Wise Protocols for Somatic Embryogenesis of Important Woody Plants, 159–66. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-89483-6_12.

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3

Diamantoglou, S., and G. P. Banilas. "Pinus pinea L. (Stone Pine) and Pinus halepensis Mill. (Aleppo Pine)." In Biotechnology in Agriculture and Forestry, 389–406. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-662-10617-4_23.

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4

Schiller, Gabriel. "Therapeutic Use of Aleppo Pine (Pinus halepensis Mill.)." In Medicinal and Aromatic Plants of the World, 215–24. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-9276-9_11.

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5

Tzfira, T., A. Ya’ari, O. Yarnitzky, J. Riov, and A. Altman. "In Vitro Clonal Propagation of Aleppo Pine (Pinus Halepensis Mill.)." In Plant Biotechnology and In Vitro Biology in the 21st Century, 89–92. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4661-6_20.

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6

Mudd, Gavin M. "Uranium mill tailings in the Pine Creek Geosyncline, northern Australia : past, present and future hydrogeological impacts." In Uranium in the Aquatic Environment, 831–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-55668-5_97.

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7

Kurpe, Oleksandr, Volodymyr Kukhar, Eduard Klimov, Sergii Chernenko, and Elena Balalayeva. "Implementation of Pipe Steel Grade X52M Manufacturing According to API-5L Requirements Applied to Hot Rolling Mills “1700”." In Lecture Notes in Mechanical Engineering, 418–29. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22365-6_42.

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8

Vuong, Vinh-Dat, Anh Quang Vu, Marina Kawai, Kazuhito Tsujimoto, Thang Van Le, and Nguyen Danh Thao. "Formation of Rust Scales on Mild Steel Pile in Brackish Water of Phu My Port - Vietnam." In Lecture Notes in Civil Engineering, 763–67. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0802-8_121.

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9

Kiefner, J. F., and E. B. Clark. "Identifying Unknown Samples of Line Pipe." In History of Line Pipe Manufacturing in North America, 8–1. ASME, 1996. http://dx.doi.org/10.1115/1.812334_ch8.

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Occasionally, a pipeline operator encounters a pipeline or a segment of a pipeline for which the history of manufacturing may be unknown. Aside from the diameter which can be easily measured and the wall thickness which can be determined ultrasonically, how does one go about identifying the grade, the material (iron or steel), the seam type (if any), the manufacturer, and whether or not the material is API line pipe? Some helpful techniques are discussed below. First, it is wise to thoroughly check one's files. Sometimes the mill certificates for old pipe orders still exist. Alternatively, if a third-party inspection company was used, it may be worthwhile contacting that company to see if they still have the mill certificates.
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10

Kiefner, J. F., and E. B. Clark. "Furnace Butt-Welded and Lap-Welded Pipe." In History of Line Pipe Manufacturing in North America, 2–1. ASME, 1996. http://dx.doi.org/10.1115/1.812334_ch2.

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Butt-welding of wrought-iron pipe was invented in Great Britain by James Russell in 1824. (2-1, 2-2) In this method a plate was heated and bent to form a cylinder by butting the white-hot edges together. The tube was formed by round grooves in a hammer/anvil arrangement followed by reheating the crude tube and passing it through a round groove in a rolling mill and over a mandrel supported in the opening between the rolls. (2-2 This method was quickly overshadowed by the invention of “bell“ welding in 1825 by Cornelius Whitehouse (also of Great Britain). (2-2)
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Тези доповідей конференцій з теми "Pipe mill"

1

DiLonardo, James. "LUBRICATION OF A SEAMLESS PIPE SIZING MILL." In 49º Seminário de Laminação. São Paulo: Editora Blucher, 2012. http://dx.doi.org/10.5151/2594-5297-22682.

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2

Yuejin, Cao, and Chen Yu. "Application of wincc in cold-rolling pipe mill." In 2011 IEEE 2nd International Conference on Computing, Control and Industrial Engineering (CCIE 2011). IEEE, 2011. http://dx.doi.org/10.1109/ccieng.2011.6007963.

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3

Zhu, Lin, Tien-Chien Jen, and Yi-Hsin Yen. "Numerical Simulation of Heat Pipe Cooling in End Milling Operations: Part I—Thermal, Structural Static, and Dynamic Analyses." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-37160.

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In this paper, the feasibility and effectiveness of heat pipe cooling in end milling operations is investigated. A new embedded heat pipe technology was used to remove the heat generated at the tool-interface in the end milling process. Numerical studies were involved in four cases, including solid end-mill, solid end-mill with coolant, heat pipe end-mill and heat pipe end-mill with coolant. The thermal, static and dynamic characteristics of the end-mill were investigated using a numerical calculation with Fast Finite Element (FFE) plus solvers based on explicit finite element analysis software. The results indicate the heat pipe end-mill is most feasible and effective in the actual end milling processes.
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4

Shveikin, V. P., S. V. Smirnov, and A. V. Nesterenko. "Thermomechanical hardening of rolled stock in a pipe-rolling mill line." In MECHANICS, RESOURCE AND DIAGNOSTICS OF MATERIALS AND STRUCTURES (MRDMS-2016): Proceedings of the 10th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures. Author(s), 2016. http://dx.doi.org/10.1063/1.4967120.

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5

Collins, L. E., K. Dunnett, T. Hylton, and A. Ray. "Development of Heavy Gauge X70 Helical Line Pipe." In 2018 12th International Pipeline Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/ipc2018-78763.

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A decade ago, the pipeline industry was actively exploring the use of high strength steels (X80 and greater) for long distance, large diameter pipelines operating at high pressures. However in recent years the industry has adopted a more conservative approach preferring to utilize well established X70 grade pipe in heavier wall thicknesses to accommodate the demand for increased operating pressures. In order to meet this demand, EVRAZ has undertaken a substantial upgrade of both its steelmaking and helical pipemaking facilities. The EVRAZ process is relatively unique employing electric arc furnace (EAF) steelmaking to melt scrap, coupled with Steckel mill rolling for the production of coil which is fed into helical DSAW pipe mills for the production of large diameter line pipe in lengths up to 80 feet. Prior to the upgrade production had been limited to a maximum finished wall thickness of ∼17 mm. The upgrades have included installation of vacuum de-gassing to reduce hydrogen and nitrogen levels, upgrading the caster to improve cast steel quality and allow production of thicker (250 mm) slabs, upgrades to the power trains on the mill stands to achieve greater rolling reductions, replacement of the laminar flow cooling system after rolling and installation of a downcoiler capable of coiling 25.4 mm X70 material. As well a new helical DSAW mill has been installed which is capable of producing large diameter pipe in thicknesses up to 25.4 mm. The installation of the equipment has provided both opportunities and challenges. Specific initiatives have sought to produce X70 line pipe in thicknesses up to 25.4 mm, improve low temperature toughness and expand the range of sour service grades available. This paper will focus on alloy design and rolling strategies to achieve high strength coupled with low temperature toughness. The role of improved centerline segregation control will be examined. The use of scrap as a feedstock to the EAF process results in relatively high nitrogen contents compared to blast furnace (BOF) operations. While nitrogen can be reduced to some extent by vacuum de-gassing, rolling practices must be designed to accommodate nitrogen levels of 60 ppm. Greater slab thickness allows greater total reduction, but heat removal considerations must be addressed in optimization of rolling schedules to achieve suitable microstructures to achieve both strength and toughness. This optimization requires definition of the reductions to be accomplished during roughing (recrystallization rolling to achieve a fine uniform austenite grain size) and finishing (pancaking to produce heavily deformed austenite) and specification of cooling rates and coiling temperatures subsequent to rolling to obtain suitable transformation microstructures. The successful process development will be discussed.
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6

Kulkarni, Anil, Sirshendu Chatterjee, Yogesh Patel, and Nitin Amte. "Development of API 5L X-80 Plates and Pipes at Essar Steel." In ASME 2013 India Oil and Gas Pipeline Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/iogpc2013-9822.

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India is a large and rapidly growing economy. The energy requirements of the country in terms of oil products and natural gas is also huge. Given its vast geographical size, there is ever-growing need to transport these oil & gas products over large distances but economically. For this purpose, several new projects for laying of new pipeline networks are at different stages of planning. In order to keep the cost of such large pipeline projects lower, countries around the world have shifted to higher strength API grades of steel. This was facilitated by advances in steel-making and processing technology and modern facilities that came up in advanced countries. India is no different and we have seen a gradual shift towards higher strength API grades being used for pipelines. Essar Steel has been a major producer of API grades of steel in India over the last 15 years initially through its hot-strip mill and more recently adding a state-of-the-art 5M wide plate mill as well as pipe mills, both LSAW & HSAW. Different alloy designs have been used around the world to produce high strength and high toughness API grades. These have produced essentially two types of microstructures which are either ferrite + pearlite or ferrite + acicular ferrite. But these microstructures show varying response to the pipe-making process. Choice of alloy design also has a major bearing on the cost of steel, but is partly influenced by mill capability. At Essar, while cost was a major determining criterion for selection of suitable alloy design, mill capability was not a constraint. Essar Steel has successfully produced X-80 plates and pipes with a modified HTP alloy design and using the new facilities of plate mill & pipe mill. The paper gives some of the key highlights of this development activity. This was a collaborative effort between the metallurgists & engineers at Essar Steel India Limited and experts from CBMM.
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7

Babakri, Khalid Ali. "Root Causes for Failures in Flattening Test in High Frequency Induction Welded Steel Pipe Mill." In 2010 8th International Pipeline Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ipc2010-31535.

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The aim of the flattening test in a High Frequency Induction Welded (HFIW) steel pipe mill is to test the weld integrity. Failures in the flattening test may cause rejection of tested pipe and additional costs as result of retesting the other pipes from the same coil, scrapping and cutting the tested material, segregating and transporting of pipes required for flattening retest, and delaying the release of material. This paper presents the root causes for failures in the flattening test due to inadequate process control. The paper also discusses the failures in the flattening test associated with the severity and lack of clarity of the acceptance criteria in some of the pipeline international specifications. The targeted specifications are API 5L and ISO 3183. Specifically, the paper proposes, based on practical experience, changes of the acceptance criteria in the international specifications related to the first step of flattening test which is the test of weld ductility.
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8

Xu, S., and W. R. Tyson. "CTOA Measurement of Pipe Steels Using DWTT Specimen." In 2008 7th International Pipeline Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/ipc2008-64060.

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A major issue of applying the crack-tip opening angle (CTOA) approach to fast ductile fracture control is to characterize material toughness (CTOAc) using laboratory-scale specimens and to recommend a mill test. In this report, existing direct and indirect CTOA measurement methods are comprehendsively reviewed. Direct surface measurement methods as standardized in ASTM E2472-06 are mainly based on experience with sheet materials, and the measurement distance from the crack tip recommended in the ASTM standard should be increased for thicknesses typical of pipe steels. Methods using data on load (P) vs. load-line displacement (LLD) from instrumented drop-weight tear test (DWTT) specimens are given special attention, including original and modified two-specimen methods, original and modified single-specimen methods (SSM) and a recent simplified single-specimen method (S-SSM). The results of DWTT/CTOA tests at CANMET-MTL on six pipe steels (five modern high-strength steels and one older X52 steel) are briefly presented. The simplified single-specimen method (S-SSM) is repeatable and may be suitable for a mill test. However, there remains a discrepancy in CTOA values between surface measurements and those from the S-SSM, and it was found that the CTOA decreased somewhat with increasing ligament size from 66 mm to 95 mm. Transferability of results from lab to field will be discussed briefly.
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9

Bauer, Ju¨rgen, Volker Schwinn, and Karl-Hermann Tacke. "Recent Quality Achievements on Steel Plate for Line Pipe." In 2002 4th International Pipeline Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ipc2002-27316.

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From the viewpoint of a plate manufacturer the status of steel plate quality for line pipe applications is discussed. Technologies of the steel shop and the plate mill to create high class material are presented, as well as alloying and accelerated/intermediate cooling concepts. The levels of consistency that can be reached are illustrated on recent contracts. This includes sour gas resistant line pipe steels, applications for low temperatures and the extension of these features towards high strength grades.
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10

Gandzha, Sergey, Bakhtiyor Kosimov, and Dilshod Aminov. "Selecting Optimal Design of Electric Motor of Pilgrim Mill Drive for Manufacturing Techniques Seamless Pipe." In 2019 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM). IEEE, 2019. http://dx.doi.org/10.1109/icieam.2019.8742941.

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Звіти організацій з теми "Pipe mill"

1

Easterly, CE. Tailings Pile Seepage Model The Atlas Corporation Moab Mill Moab, Utah. Office of Scientific and Technical Information (OSTI), November 2001. http://dx.doi.org/10.2172/814551.

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2

Luxmoore, R. J., R. J. Norby, E. G. O. Neill, and D. G. Weller. Growth and chemical responses to CO{sub 2} enrichment - Virginia pine (Pinus virginiana Mill.). Office of Scientific and Technical Information (OSTI), March 1985. http://dx.doi.org/10.2172/543638.

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3

Gee, G. W., M. D. Campbell, H. D. Freeman, and J. F. Cline. Assessment of cover systems at the Grand Junction, Colorado, uranium mill tailings pile: 1987 field measurements. Office of Scientific and Technical Information (OSTI), February 1989. http://dx.doi.org/10.2172/6517949.

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4

Sturzenegger, Germán, Cecilia Vidal, and Sebastián Martínez. The Last Mile Challenge of Sewage Services in Latin America and the Caribbean. Edited by Anastasiya Yarygina. Inter-American Development Bank, November 2020. http://dx.doi.org/10.18235/0002878.

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Access to piped sewage in Latin America and the Caribbean (LAC) cities has been on the rise in recent decades. Yet achieving high rates of end-user connection between dwellings and sewage pipelines remains a challenge for water and sanitation utilities. Governments throughout the region are investing millions in increasing access to sewage services but are failing in the last mile. When households do not connect to the sewage system, the full health and social benefits of sanitation investments fail to accrue, and utilities can face lost revenue and higher operating costs. Barriers to connect are diverse, including low willingness to pay for connection costs and/or the associated tariffs, liquidity and credit constrains to cover the cost of upgrades or repairs, information gaps on the benefits of connecting, behavioral obstacles, and collective action failures. In contexts of weak regulation and strong social pressure, utilities typically lack the ability to enforce connection through fines and legal action. This paper explores the scope of the connectivity problem, identifies potential connection barriers, and discusses policy solutions. A research agenda is proposed in support of evidence-based interventions that have the potential to achieve higher effective sanitation coverage more rapidly and cost-effectively in LAC. This research agenda must focus on: i) quantifying the scope of the problem; ii) understanding the barriers that trigger it; and iii) identifying the most cost-effective policy and market-based solutions.
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5

Narasimhan, T. N., A. F. White, and T. Tokunaga. Hydrology and geochemistry of the uranium mill tailings pile at Riverton, Wyoming. Part II. History matching. [Mathematical simulation of the observed fluid potentials within the tailings, and the observed distribution of various chemical species within and around the mill tailings]. Office of Scientific and Technical Information (OSTI), February 1985. http://dx.doi.org/10.2172/5501969.

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6

Bracewell, Jeff, and Jane Carlson. Coastal topography change at Padre Island National Seashore, Texas: 2017–2021 data summary. National Park Service, March 2022. http://dx.doi.org/10.36967/nrds-2293032.

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In May and June 2017, April 2019, and May 2021, the Gulf Coast Network (GULN) collected coastal topography data at Padre Island National Seashore (PAIS) as a part of the NPS Vital Signs Monitoring Program. Monitoring was conducted following methods detailed in Monitoring Coastal Topography at Gulf Coast Network Parks: Protocol Implementation Plan (PIP; Bracewell 2017). Key findings from this effort are as follows: A fixed set of 23 topographic transects distributed along the Gulf shore were surveyed. The most accelerated change in profile area occurred in the transect groups located near Mile Markers 15 and 37. This is likely due to the impacts from Hurricane Hanna. The transects on the south end of Padre Island National Seashore near Mansfield Channel showed short-term losses in profile area (2019 to 2021) that are less than the longer-term losses (2017 to 2021). The transect nearest the channel showed substantial recovery, which is related to the deposition of dredged material. This project is in the early phases of implementation and will benefit from future surveys to better understand the influence of slight changes in survey timing and other environmental variations.
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