TPT March 2008

T echnology U pdate

Latest FQM facility for 635,000t of seamless pipes a year JSC Seversky Tube Works, Russia, a subsidiary of TMK, will revamp its existing pipe rolling shop with the installation of a new Danieli retained mandrel mill, FQM™ type (Fine Quality Mill). Seversky’s pipes are currently produced on two pilger mills. The new production facility will be used to manufacture approximately 635,000t/year of seamless pipes with an OD range from 168.3mm to 365.1mm. This pipe will have a high quality of inner and outlet surfaces and a high degree of pipe accuracy in terms of wall thickness and diameter. FQM offers process technology able to produce seamless pipes with high quality features (close wall thickness tolerances and very smooth surfaces), at low production costs. The process offers a high degree of production flexibility, versatility and efficiency. The revamped hot rolling line will comprise the outlet of the existing piercing mill up to final tube collecting benches in the intermediate storage and the revamping of the existing billet furnaces. All new equip- ment supplied for the revamping process will be installed in the existing building. The new FQM – with the relevant mandrel retaining and circulating system – will be installed in the transversal bays, while all equipment after the extracting mill will be located in the new longitudinal bay. The pipe rolling shop will be revamped alongside the existing pilger mills, ensuring that produc- tion can continue during installation. Once installation is complete, the older mills will operate during downtime of the FQM mill. Once the hot rolling line is operational, the feedstock will consist of continuous cast round billets – 290mm and 360mm diameters. Billet cutting into lengths is performed by means of existing cold saws, with carbide tipped blades. The continuous cast round billets are heated to a maximum temperature of approximately 1,280° in two existing rotary hearth type furnaces (also revamped in accordance with the required productivity). At the outlet of the furnace, the billets are transported through a high pressure water descaler to the piercing mill, where the billets are rolled into shells. The piercing of the billet is performed in an existing piercing mill, while the material is guided during 90° rolling by two vertical guide shoes.

Steel tube range from Taiwanese manufacturer

such as oil, chemical, food, nuclear power and other industries. In addition to stainless steel pipes, the com- pany can supply different types of carbon and alloy steel pipes, with both welded and seamless standards. The steel grades of carbon steel seamless pipes include ASTM A 106/ASME SA 106, ASTM A53/A53M/ASME SA-53, API 5L GR.B/X42/X52/X60/X65, E355 and DIN2391 ST52/ST52.3. The steel grades of alloy steel seamless pipes include ASTM A335 P5, P9, P11, P12, P22, P91, P92, and ASTMA213, T5, T9, T11, T12, T22 and T91.

Yieh Corp, part of E-United Group, has headquarters in Kaoshiung, Taiwan, and branches in Guangzhou and Shanghai, China. The company and acts as a global steel marketing representative for E-United Group’s steel capabilities. The company can provide its global customers with diverse steel products such as stainless steel, galvanised steel, pre-painted steel and carbon steel, in both flat and long products. Yieh Corp can supply both seamless and welded stainless steel pipes, based on different standards and sizes. The main steel grades of seamless stainless steel pipes include TP304, P304L, TP316, TP316L, TP321, TP310S, TP347H, TP317L and TP2205. The company’s stainless steel tube and pipe are suitable for use in areas

Yieh Corp – Taiwan Fax : +886 7 615 3000 Email : ec@yieh.com Website : www.yieh.com

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M arch 2008

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