The hallmark "Made by S+C" is a worldwide guarantee for outstanding components and solutions in high-grade steel: corrosion-resistant, heat-resistant and wear-resistant, from semi-finished products to ready-to-install components and systems.

Whether steam cracker, steam reformer, or DRI plant – S+C’s Advanced Engineering Services combine profound material expertise with industry-specific know-how. Every service is as individual as our customers’ requirements – ensuring maximum efficiency, safety, and performance in operation.

Superior quality – this is the constant challenge that S+C sets itself. Direct contact with our customers, and collaboration with respected research institutes and universities worldwide, help our experts develop market-oriented innovations.

S+C Competence

Products for Steam Cracker

SCOPE®

Optimized Profiles for Steam Cracking Furnaces

The basic idea is a rotating flow pattern. In general, this tube design substantially improves the heat transfer from the outer skin of the tube into the gas phase by a higher convection and thus, decreases the tube skin temperature.

The tangential rotation of the gas phase increases the average feed-gas temperature in general and beyond this, provides an additional temperature balancing effect: So in detail it increases the gas temperature at the core flow and reduces the temperatures in the boundary layer close to the tube inner side. This is effectively reducing inefficient reactions and where it is needed, detrimental coke deposition on the bore surface the inner of the tube.

The gas phase rotation further decreases the temperature gradients in the tube shell that are caused by the arrangement of the burners so that the burner facing tube side gets colder, which is increasing tube lifetime.

Features of the unique profile geometry

Our SCOPE® tube profile allows for a manipulation of the feed flow and thus increases productivity, efficiency and durability of your steam cracker. The 3D tube design, embedded in a perfect centrifugally cast tube, i.e. no welding seams or any other features, will provide you with the following benefits:

Less coking
Reduced carburization
Multiple times longer production runs
Increased product selectivity
Higher energy efficiency
Longer furnace lifetime
Higher operating profit

Independent from material selection

One important aspect in designing a steam cracker is that the radiant coil is limited by metallurgy, While selecting a material, the carburisation resistance, operating temperature, creep rupture strength, oxidation resistance, weldability, to name a few only, of the material play, of course, an important role.

Regardless of this, you can use our SCOPE® technology, in whichever metallurgy of our Centralloy® alloy family nominated. Therefore, simply enhance your existing tube system with SCOPE® and still leverage the advantages of distinct materials in your radiant coil.

Favourable yield pattern due to higher selectivity

The implementation of our SCOPE® technology will significantly improve the overall plant performance. The optimized heat distribution within the feed flow and the more even radial temperature profile improving the cracking process.

The aim is a more controlled cracking process in order to minimize both insufficient cracking and/or excessive cracking. This results in a higher output of desired cracking products – meaning more olefins and less pyrolysis gas.

Energy efficiency enhancement in order to reduce the carbon footprint

The firebox heat duty represents the energy necessary in order to heat the feedstok/steam mixture up to the temperature at which it leaves the radiant coil. Therefore, thermal efficiency is a major influencing factor in operating economics in any cracker plant. Moreover, the thermal load varies with different feed rate(s), feedstock composition, and, of course, cracking severity.

Hence, our SCOPE® profile creates a specific flow pattern with an increased absolute velocity and a thinner boundary layer, the heat transfer into the feedstock/steam mixture is substantially improved. Due to this, the usage of the applied energy is more efficient, i.e. reduced cost for energy as well as lower greenhouse emissions.

SCOPE® Fusion HT E

The perfect match

While combining the “anti”-coking and carburization resistance properties of our Centralloy® HT E and the controlled feed flow manipulation by SCOPE® creates a product unrivaled within the industry: SCOPE® Fusion HT E

S+C manufactures the outstanding SCOPE® Fusion HT E tubes by centrifugally casting. Stringently controlled melting and casting practice are in place. The careful blend of elements in our Centralloy® HT E material ensures optimum high temperature properties. Thus provides extended operational intervals (well beyond 100 days of continuous operation), significantly improved yield pattern as well as excellent energy efficiency, for the plant operator.

S+C has supplied tubes in SCOPE® Fusion HT E for many projects around the world and life of radiant coils with “the perfect match” expected to last much longer and perform more reliable even under adverse conditions. Frequently, clients enjoy performance well beyond expectation.

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