Our certification

Tested 'Made in Germany' quality

We implement modern quality control techniques so that we can offer our customers the following:

  • Outstanding product quality
  • Maximum flexibility
  • Top customised service
  • Competent advice

Avoiding errors and continuously improving our processes, products and services is an obligation for all of our employees. In order to ensure that these requirements are met, we are certified in line with the strict DIN EN ISO 9001:2008 guideline and have integrated all production and management processes into our quality management system. In short: From goods-in right through to the final inspection, we do everything to provide our customers with nothing but the best quality.

However, our quality requirements go well beyond mere norms. We document these with the selection of our material suppliers (we only use certified 'first addresses' among international smelting works) and enlist the help of the most cutting-edge 'in-process inspections' for our production. This is how we are able to guarantee the quality of our products and services at any given time.


Energy management system according to DIN EN ISO 50001:2011

TÜV Certificate DIN EN ISO 9001:2015 english

TÜV Certificate AD 2000 W0 TRD 100 english

TÜV Certificate DGRL 97 23 EG english

TÜV Rheinland ASTM A 178


Bureau Veritas

Germanischer Lloyd approval

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Dear visitor to this website,

the Rudolf Flender Rohr GmbH pipe production in Siegen was permanently closed on December 31, 2020. The production is closed and all supplies and machines have been sold. We ask you to pay attention to this!

To preserve, remember and honor the work of all employees who have written a total of 110 years of company history, this website remains online, even if no more products are offered for sale.

To contact us, please dial +49 (271) 3305-0 or email: info@flender-rohr.de.

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