TPT November 2011

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Article
Frank Legac – SMS Meer GmbH
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Characteristic
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
Exact length
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
L > 10 mt -0.0 / +5.0mm +
1mm/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