Together with network operators, we work out strategies for assessing the condition of steel pipelines after decades of service and implement them in technical rules and regulations.
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HFI-welded steel pipes with slip-welding joints and a modified cement mortar lining are our response to increasing demand for pipelines used in the transportation of oil-water mixes from water-flooded oilfields. » read more
A highly sophisticated bainitic steel adapted to pipe production by Salzgitter Mannesmann Line Pipe ensures safe transportation of gaseous and liquefied media at ultra-low temperatures.
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Previously, only line pipe made from steels up to and including grade X52 (L360) to API 5L were approved or considered safe for the transportation of pure hydrogen or its admixture to natural gas. Our investigations revealed that higher-grade steels up to and including X70 (L485) are equally safe and suitable. » read more
The combination of laser welding and ultrasonic testing in a single operating step has successfully passed its pilot test. This process can enormously reduce the cost and time involved in pipe-laying projects. » read more
Mannesmann Line Pipe is expanding the spectrum of methods by systematically combining various approaches to microstructure characterization with a view to optimizing the properties of its tube and pipe. » read more
Mannesmann Line Pipe has recently developed an innovative model that can predict the depletion of alloying elements in HFI-welded joints. » read more
1897 Start of production of longitudinally welded Mannesmann steel pipe
1937 Start of pipe production at the Siegen location
1952 Market launch of welded gas line pipe
1958 Market launch of polyethylene pipe coating
1965 Start of pipe production at the Hamm location
1986 Market launch of fiber cement mortar coating
2007 Start of 24" pipe production
2010 Start of production of pipes with wall thicknesses of 1"