TPT November 2011

A rticle

The nearest tolerance to: EN10219 – EN10208 – EN10217 – ISO3183 – API5L

Example 1 Ø 127. x6. x6.000 S275

Example 2 100. x100. x8. x 6.000 S355

Example 3 1300. x150. x14. x 10.000 S355

Example 24 Ø 323.9 x 16. x 12.000 S355

Characteristic

L< 6mt

-0.0 / +5.0mm

6. ≤ L ≤ 10 mt

-0.0 / +15.0mm 6.007 ÷ 6.012mm 6.006 ÷6.012mm

10.008 ÷ 10.014mm

Exact length

-0.0 / +5.0mm + 1mm/mt

L > 10 mt

12.006 ÷ 12.016mm

Table 5 : Length tolerances

Figure 10 : US – Seam testing device

In future, increased experience and optimisation of the operations will allow even shorter changing times. Arvedi intends to achieve 1½ hrs for a complete size change from good tube to good tube.

5. Future measures Increasing operational experience will allow the production results to be further improved. With operating time increasing and by means of systematic optimisation processes, the target is to achieve an optimum of line speed, yield, runtime and change over time. An extension of the product mix is possible by integrating an additional seam annealing unit into the welding line, allowing the production of higher weld seam qualities for new products and other material grades. 6. Conclusion The tube welding line installed at Arvedi represents the latest plant technology available for effective production of a wide, but nevertheless specialised size range. The experiences gathered to date have shown that the market demands on special and mass products can be satisfied with this plant. Moreover, the plant offers sufficient potential for developing new products and serving future markets.

Figure 11 : Square and rectangular tube sizes of the new line

Figure 12 : Arvedi’s product range of round tubes

Frank Legac – SMS Meer GmbH Fax: +49 21613 501870 Email: frank.lagac@sms-meer.com Website: www.sms-meer.com

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