Only the best steel pipes for our customers

Rudolf Flender Rohr GmbH from Siegen is your specialist for manufacturing HFI longitudinally welded steel pipes for a wide range of applications. We use five modern pipe welding lines to produce round tube pipes and precision pipes of tried-and-tested carbon steel quality, as well as standard profiles and special profiles made from carbon steel and ferritic stainless steel goods.

Our Flender-Flex-TubingĀ® pipes from the roll are unique. This procedure is also known as coiled tubing. Depending on the diameter of the pipe, this process enables us to wind up to 4,100 metres of continuous steel piping onto a coil. We test the quality using highly pressurised water. It is not necessary to weld individual sections of pipe, which ensures additional security and tightness.

Our systems also take care of the external coating and internal lining of steel pipes. These may be pipes for the transportation of oil and gas, but also water pipe lines, which may be fibre-coated or produced with an epoxy or cement coating, depending on the intended purpose. Our spectrum of services is topped off by a wide range of processing options.

Don't forget: Our pipes designed for the transport of petroleum, natural gas and chemicals obviously meet all the safety and quality requirements in line with IS0 3183.

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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:

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