Journal SUDURA (Welding)

Nr. 2/2015

 
 

Revista Sudura 1/2015

The articoles are published in romanian and english languages

 

Checking the Strength and Toughness of the Welded Joints Performed for the In-Service Repair of Transmission Pipelines Prof. dr. ing. ZECHERU Gheorghe (1), Dr. ing. BIRSAN Florin Marius (2), Conf. dr. ing. DUMITRESCU Andrei (1), Conf. dr. ing. DRAGHICI Gheorghe (1) 1) Universitatea Petrol – Gaze din Ploieşti; 2) S.N.T.G.N. „TRANSGAZ” Medias e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. Abstract The qualification of the welding procedures required for the repair of in-service transmission pipelines is typically based upon the mechanical strength and toughness properties, determined by testing some specimens containing the welded joints performed, complying with the requirements of some preliminary specifications, on test pieces obtained by applying by welding, on a pipe section through which a cooling fluid is circulated, a sleeve made of two semi-cylindrical components (type B sleeve). In order to check the mechanical properties of the welded joints which are carried out (using welding procedures qualified in such manner) for the repair of transmission pipelines with different working regimes (characterized by pressure, flow rate and velocity of the transported fluid), the authors have proposed the following technical solution: a. deposition of some weld runs (single or multiple) or the application of welded small plates onto the in-service pipelines (with a given operating regime); b. extraction of coupons containing the runs deposited by welding or the welded small plates, using the hot-tapping and stoppling equipment and technologies for pipelines; c. checking, by means of tests and examinations carried out on specimens and samples cut from the extracted coupons, the microstructure and mechanical properties of the welded joints.

The paper presents the types of investigations and tests which have to be performed on the samples and specimens cut from coupons in order to be able to obtain a pertinent characterization of the quality of the welded joints executed on the in-service pipelines and the manner in which a consistent database can be built to underlie the range of welding procedures qualification. Key words: transmission pipeline; maintenance work; in-service pipeline repair; repair by welding; qualification of welding procedures; quality assurance of welding joints.

Aspects of the use of welding standards as reference standards in the application standards for welded products Ing. Petru Tenchea Presedinte ASRO/CT 39 – Sudare si procedee conexe e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. Abstract The welding and allied processes related standards were created to have a general character, for the use in as more as possible industrial fields. The New Approach has created the framework for the preparation of many European standards families for welded products. These standards use the general welding standards as reference standards. In this work, the application standards families (pressure equipment, construction products, railway application, pipelines of the gas infrastructure...) are synthetically presented, including the relations with the European Directives/Regulations and the general welding and allied processes related standards. Key words: swelding standard; application standard; reference standard; ISO; CEN

Development of the welding engineers training in Romanian higher education Prof. dr. ing. Radu Iovanas - Universitatea Transilvania din Brasov e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. Abstract We consider a debt of honour, honouring founders „welding” specialization in higher education in Romania, the beginnings and subsequent crossings with changes produced in the country at both the industrial and changes Romanian education in the last 25 years. The work consists of gathering and ordering data and information on the evolution of specialization WELDING, from the place of origin and initial development, to Politehnica University of Timișoara, continuing with the creation and development explosive (1978), in several universities in Romania, respectively Bucharest, Galati, Brasov, later in Constanta, Craiova – Drobeta Turnu Severin and for short periods in Arad, Resita, Oradea, Iasi and Cluj - Napoca. It presents the current state of civil welding engineering specialization in Romania after the new system under the Bologna reforms, the license (4 years), master (1.5-2 years) and PhD, and a statistical test to graduate after 1979 / 1980 nationwide (over 6000 graduates!) and each university. Welding Engineering Specialization (WE) is one of the few specializations in the field of Industrial Engineering, who remained higher technical education in Romania and was improved over time and is characterized by personality and unanimous recognition, confirming that: „In life and in nature is nothing without ... Welding!”

 THE SOCIETY INFORMS YOU

  • ASR General Assembly and Conference “WELDING 2015”, 22-24.04.2015, Arad
  • Workshop “National Welding Capability”, 3.06. 2015, Timisoara
  • The 3rd IIW South-East European Welding Congress, 3-5.06.2015, Timişoara
  • List of companies with advertisments in SUDURA 2/2015
  • Personals
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  • A remarkable achievement at Arad ASR Branch
  • ASR website – a new interface
  • ASR Courses, September 2015