The Modern Trends of Development of the Pipe and Tube Industry

نویسنده

  • N. A. MAXIMOVA
چکیده

Great efforts have been recently made in the world of metallurgy in order to reduce raw material consumption and particularly energy consumption. Although most metallurgical products are produced by the proved procedures of plastic forming, some changes appear owing to the following requirements: – improvement of product quality, – reduction of production costs, – increase of productivity as well as capacity, yield and equipment availability, – higher flexibility concerning the production program. The requirements for the quality parameters of hot and cold formed steel and non-ferrous metals increasingly insist upon 1 : – optimisation of chemical composition, – improvement of purity grade concerning the nonmetal inclusions, oligo-elements and gas contents, – restricted mechanical properties, – more suitable and more uniform structure, less segregations, – closer dimensional tolerances for: section, width, length, (wall thickness for pipes), – improved straightness for flat products, – section shape according to the forming procedure, – improved surface quality (additional by grinding and polishing), – surface treatment (coating by metals, plastics, varnish, etc.). Intensive researches in the plastic forming theory and particularly in the process technology development are carried out in order to achieve these high requirements 2, 3 . Nowadays, basic characteristics of world steel production and plastic forming are specified through automation and processes management by means of computers. Actually, computer engineering and technology is a big and significant innovation in the recent years of metallurgy, the innovation being introduced with a great speed. In these days there are no single segment in up-to-date iron works without computers used for informing or processing managements. Production units or production lines without computers are considered to be out-of-date, because of small productivity, inefficiency and high costs. In developed countries, the computers participate with about 90 % in the managing of metallurgical processes in steel producing and plastic deformation. Therefore, the purpose of this article is to present a review of steel tubes production, especially urgent problems of the pipe and tube industry.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Punch plastic deformation pipe cladding (PPDPC) as a novel tube cladding method

This study presents a new mechanical tube cladding process named punch plastic deformation pipe cladding (PPDPC) based on local deformation by pressing a punch into the inner layer of the bimetal tube. To investigate the capability of the process, stainless steel tube (as the inner layer) is bonded to a carbon steel pipe (as the outer layer) to fabricate a bimetal pipe. Shear punch tests were u...

متن کامل

Numerical Study of a Pipe Extension Effect in Draft Tube on Hydraulic Turbine Performance

Draft tube of Francis type hydraulic turbine usually consists of: cone, elbow and diffuser. On the contrary, in some power stations an extra pipe should be added to the draft tube at the bottom of cone because of installation limitation. In this paper, this special case has been numerically studied. To this end CFD analysis was applied to simulate all parts of hydraulic turbine. A homogeneous m...

متن کامل

Modeling and thermal parametric analysis of U-pipe evacuated tube solar collector for four different climates in Iran

In this study, thermal performance of the collector with analytic and quasi-dynamic method is evaluated based on energy balance equations for each part of the U-pipe evacuated tube solar collector. Using this approach, effect of different parameters such as tube size, overall heat loss coefficient, absorber tube absorptivity, mass flow rate and air layer thermal resistance on thermal performanc...

متن کامل

Outcomes of Using New Technologies in the Development of Recreational Sports: From Increasing Participation to Wealth Creation

Background. Today, technology is becoming one of the most critical factors that have led to the internationalization of competition in the sports industry. Nowadays, the sports industry is increasingly in need of technology to facilitate proper performance. Objectives. The present study aimed to identify the outcomes of using new technologies in the development of recreational sports. Methods...

متن کامل

The Overall Heat Transfer Characteristics of a Double Pipe Heat Exchanger: Comparison of Experimental Data with Predictions of Standard Correlations

The single-phase flow and thermal performance of a double pipe heat exchanger are examined by experimental methods. The working fluid is water at atmospheric pressure. Temperature measurements at the inlet and outlet of the two streams and also at an intermediate point half way between the inlet and outlet is made, using copper-constantan thermocouple wires. Mass flow rates for each stream are ...

متن کامل

The strategy of sustainable development and waste management: Case study: Commercial power industry

In this study, the relationships between two variables: the strategy of sustainable development and the efficiency of waste management in the commercial power industry company have been subjected to discussion. The basis for the explanation of the aforementioned relationships is the assumption that the level of implementation of the strategy of sustainable development is expressed through capit...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2010