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Tenaris is an Italian manufacturer and supplier of seamless and welded steel pipe products and provider of pipe handling, stocking, and distribution services to the oil and gas, energy, and mechanical industries. It is a majority-owned subsidiary company of the Italian group Techint.It is headquartered in Luxembourg and is also a supplier of welded steel pipes for gas pipelines in South America. With manufacturing facilities in Argentina, Brazil, Canada, China, Colombia, Italy, Japan, Mexico, Romania, USA, and Venezuela and a network of customer service centers in over 20 countries. Tenaris has an annual production capacity of 3.3 million tons of seamless, and 2.8 million tons of welded pipes, annual consolidated net sales in excess of US$ 12.1 billion and 23,500 employees worldwide. Tenaris has recently bought Hydril and later split the premium connections from pressure control side of the business. The pressure control business was sold to GE Oil and Gas in April 2008.The company's CEO is Paolo Rocca; its CFO is Edgardo G. Carlos, its CIO is Carlos Pappier and its Commercial Director is Alejandro Lamartyn. Wikipedia.

Gambirasio L.,University of Bergamo | Chiantoni G.,Tenaris Group | Rizzi E.,University of Bergamo
Archives of Computational Methods in Engineering | Year: 2016

This paper deals with a particular issue of computational mechanics in main FEM codes nowadays available, i.e. the outcomes of implementations of large strain constitutive models based on the adoption of so-called objective stress rates, in order to satisfy objectivity requirements. The point here is that of directly inquiring whether well-known incoherencies due to the adoption of the Zaremba–Jaumann objective stress rate may manifest themselves when the most used elastic and elastoplastic constitutive models are adopted. The present investigation aims at providing a comprehensive review of the theoretical aspects and at developing an informed knowledge to final users of FEM codes, in terms of exposing which constitutive models and FEM implementations may be affected by Zaremba–Jaumann objective stress rate induced incoherencies. Towards this end, local FEM simple shear tests are explored and clearly show that kinematic cases characterized by a non zero spin may be heavily affected by oscillatory incoherencies, which arise for expected cases, i.e. Cauchy stress responses, but also for other less expected cases, i.e. strain responses, whether they are total, elastic or plastic. Beyond local tests, structural simple shear tests are also performed and show as well that oscillatory incoherencies found in local simple shear tests may heavily influence the overall structural outcomes. A non-secondary target of the paper is that of reviewing the relevant scientific and technical literature about objective stress rates, by critically analyzing correlated issues and proposed solutions, considering scientific contributions spanning over a century, keeping specific attention to the treatment of the Zaremba–Jaumann objective stress rate and to the possible flaws related to its adoption. © 2014, CIMNE, Barcelona, Spain. Source

Perez T.E.,Tenaris Group
Energy Materials 2014, Conference Proceedings | Year: 2014

Important reserves of oil and gas, which are left to be discovered and produced, are mainly concentrated in challenging locations and under severe conditions (i.e. high pressure-HP/high temperature-HT). The HP/HT plus the presence of aggressive environments mean a highly demanding scenario for tubes used in producing oil and gas (Oil Country Tubular Goods OCTG). Material property requirements include high mechanical properties at ambient and high temperatures (e.g. as high up to 200-250° C). Additionally, if H2S is present, resistance to sulfide stress cracking may be required, depending also on other environmental conditions. Even without H2S, contents of CO2, chlorides and high temperatures and pressures can represent a risk of high corrosion rates. The improvement of some of the required properties of the materials can mean the impairment of other properties. Consequently, a careful balance is required and limits exist for the individual modification of the properties. The present paper focuses on the two main environmental deterioration problems in the oil and gas business: (1) sulfide stress cracking, and (2) CO2 corrosion. A description of the acting mechanisms and the effect of environmental and material factors are presented. Selection criteria and current material limitations are also discussed. Source

Altamura A.,Tenaris Group | Beretta S.,Polytechnic of Milan
International Journal of Pressure Vessels and Piping | Year: 2012

Manufacturing process, service conditions and material properties are all necessary requirements to a good design of tubular mechanical components subjected to fatigue. The most common approach to this design is usually deterministic, where a fixed NDT threshold, related to flaw acceptance limit, is set. However many uncertainties are left aside, i.e. the failure probability related to the fatigue strength under applied loads. This paper addresses the reliability evaluation of tubular mechanical components carrying some flaws and subjected to cyclic internal pressure variation. The aim is comparing the probability of failure obtained under several assumptions.A reliability assessment model, based on a random variable approach, has been implemented by using the Monte Carlo method. The analysis of the results, from a case study based on load spectra measurements of hydraulic cylinders of earth moving machines, has consented to evaluate the most important factors influencing the fatigue life prediction of these components. © 2012. Source

News Article | September 29, 2015
Site: www.businesswire.com

CHICAGO--(BUSINESS WIRE)--Workforce magazine, published by Human Capital Media, announces the companies that are the finalists for the 2015 Optimas Awards. The awards program, which celebrates its 25th anniversary this year, recognizes companies that are achieving measurable business outcomes through visionary and impactful human resources initiatives. Twenty-one companies have been named finalists from this year’s pool of nominees. Gold and silver Optimas Awards are awarded in the following categories: Benefits, Business Impact, Corporate Citizenship, Global Outlook, Innovation, Managing Change, Partnership, Recruiting, Training and Vision. Additionally, Workforce will name a General Excellence winner for a company demonstrating excellence in at least six of the aforementioned categories. “Throughout the 25 years of these awards, we’ve seen companies place increasing importance on human resources initiatives, realizing the potential a strong HR department can have on business growth,” said Rick Bell, managing editor of Workforce magazine at Human Capital Media. “This year’s finalists stand out in an ever-expanding field of qualified nominees, and we’re pleased to see so many organizations using innovative HR practices to improve their business.” Workforce will announce the winners of the 2015 Optimas Awards on Dec. 2 in a special edition of the Workforce Web series “5 Minutes of Management,” and winners will be profiled in the December issue. For more information on the program and past winners, please visit workforce.com/optimas. Workforce is a multimedia publication that covers the intersection of people management and business strategy. Our content helps HR professionals approach their jobs from a more strategic, big-picture, business-results perspective. Human Capital Media (HCM) is the largest integrated media company serving the human capital, management and workforce development industries. Through award-winning content, events, awards and research, they deliver valuable news, analysis, tools and solutions to make the most of human capital, as well as create a vibrant community where decision makers and solution providers connect to solve their greatest workplace challenges.

DUBLIN--(BUSINESS WIRE)--Research and Markets (http://www.researchandmarkets.com/research/567x3n/drill_pipe_market) has announced the addition of the "Drill Pipe Market in the Middle East 2015-2019" report to their offering. Decreasing investment in in-house production units is a key trend observed in the market. Many oil and gas companies are now reducing their investments in drill pipe manufacturing as it is easily available in the market for rent. This helps to reduce the overall cost of operation and also aids in increasing the overall efficiency. According to the report, the augmented demand for oil and gas is a major driver that promotes growth in this market. This demand for oil and gas is expected to increase during the forecast period owing to the rapid increase in population and industrialization. The report includes the present scenario and the growth prospects of the drill pipe market in the Middle East for 2015-2019. The market can be divided into the following segments: The report, Drill Pipe Market in the Middle East 2015-2019, has been prepared based on an in-depth market analysis with inputs from industry experts. The report includes a discussion of the key vendors operating in this market. 06. Overview of Oil and Gas Market in Middle East

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