Schmidt + Clemens Gmbh & Co. Kg

Dietlinde Jakobi

Rolf Kirchheiner

Petra Becker

Ricky Durham

Peter Karduck

Alexander Freiherr Von Richthoffen

Peter Wölpert

Jorg Dietmar Weigandt

Benno Ganser

Steffen Alexander Heyland

Alexander Freiherr Von Richthofen

Hans-Peter Duester

Carlos Marturet

Peter Wolpert

Jörg Dietmar Weigandt

The invention relates to a pipe for thermal cracking of hydrocarbons in the presence of steam, in which the feed mixture is guided through externally heated pipes, wherein

Pipe and device for thermally cleaving hydrocarbons

A nickel-chromium casting alloy comprising, in weight percent, up to 0.8% of carbon, up to 1% of silicon, up to 0.2% of manganese, 15 to 40% of chromium, 0.5 to 13% of iron, 1.5 to 7% of aluminum, up to 2.5% of niobium, up to 1.5% of titanium, 0.01 to 0.4% of zirconium, up to 0.06% of nitrogen, up to 12% of cobalt, up to 5% of molybdenum, up to 6% of tungsten and from 0.01 to 0.1% of yttrium, remainder nickel, has a high resistance to carburization and oxidation even at temperatures of over 1130&#xb0; C. in a carburizing and oxidizing atmosphere, as well as a high thermal stability, in particular creep rupture strength.

Thermostable and corrosion-resistant cast nickel-chromium alloy

A nickel chromium alloy comprising 0.4 to 0.6% carbon, 28 to 33% chromium, 15 to 25% iron, 2 to 6% aluminum, up to 2% silicon, up to 2% manganese, up to 1.5% niobium, up to 1.5% tantalum, up to 1.0% tungsten, up to 1.0% titanium, up to 1.0% zirconium, up to 0.5% yttrium, up to 0.1% nitrogen, and nickel, has a high oxidation and carburization stability, long-term rupture strength and creep resistance. This alloy is particularly suited as a material for components of petrochemical plants and for parts, for example tube coils of cracker and reformer furnaces, pre-heaters, and reformer tubes, as well as for use for parts of iron ore direct reduction plants.

Nickel chromium alloy

A nickel chromium alloy with 0.4 to 0.6% carbon, 28 to 33% chromium, 15 to 25% iron, 2 to 6% aluminum, up to 2% silicon, up to 2% manganese, up to 1.5% niobium, up to 1.5% tantalum, up to 1.0% tungsten, up to 1.0% titanium, up to 1.0% zirconium, up to 0.5% yttrium, up to 0.1% nitrogen, remainder nickel, has a high oxidation and carburization stability, long-term rupture strength and creep resistance. This alloy is particularly suited as a material for components of petrochemical plants and for parts, for example tube coils of cracker and reformer furnaces, pre-heaters, and reformer tubes, as well as for use for parts of iron ore direct reduction plants.

Nickel-chromium-alloy

A finned tube for the thermal cracking of hydrocarbons in the presence of steam is defined by a tube axis and includes a plurality of inner fins. The fins are inclined at an angle of 20&#xb0; to 40&#xb0; in relation to the tube axis and have a flank angle of 16&#xb0; to 25&#xb0;.

Finned tube for the thermal cracking of hydrocarbons, and process for producing a finned tube

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Kö'ln, Germany

Dietlinde Jakobi