Modernization of the pipe mill with Pilger millTPA 5-12ʺ: tasks, methods, ways of implementation

Abstract

Purpose. Based on the analysis of the current state of production of pipes at the Pilger plant 5-12, PJSC Interpipe NTZ proposed new technological solutions for its modernization to expand the size and brand range of pipes produced, reduce metal consumption by improving the accuracy of pipes, ensuring energy savings by reducing natural gas and others Methodology. Selection of representative data of pipe production processes on Pilger installations operated in Ukraine and abroad from scientific and patent sources. Solving problems on the choice of optimal resource and energy-saving technological schemes for the production of pipes at TPA 5-12ʺ PJSC Interpipe NTZ at the expense of new technological schemes and equipment modernization. Findings. The article presents the results of the analysis of the state of production of pipes for injection molding machines with pilgrim mills in the modern conditions of globalization of the world economy, which requires the modernization and reconstruction of these injection molding machines to ensure competitiveness on the world market. New technological and technical solutions for the modernization of TPA 5-12, PJSC Interpipe NTZ, have been developed to expand the range and increase the diameter of the pipes to 465 mm or more from carbon, alloyed and hard-to-deform steel grades. Originality. Expanded ideas about the formation of a thin-wall with the firmware NLZ in the glass on a horizontal hydraulic press 20MN and when rolling the glass on the mill-elongator. The mechanism of formation and correction of the different wall thickness in the system of the piercing press – mill-elongator is specified and the ways of reducing the wall thickness of the sleeves and pipes are outlined. Practical value. The new technological and technical solutions developed in the article can be used for the modernization and reconstruction of Pilger plants, including TPA 5-12ʺ PJSC Interpipe NTZ, which will increase their competitiveness by expanding the size and grade of pipes, reduce metal consumption, by increasing the accuracy and reducing waste, and also provide energy savings by reducing the consumption of natural gas for heating the roll for some pipe mix. Keywords: pipe, liner, piercing press, millelongator, pilgrim installation, varnished, energy-saving, modernization, descaling.