Process information
| Key Data Set Information | |
| Location | DE |
| Reference year | 2024 |
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| Use advice for data set | Scope: The Life Cycle Assessment (LCA) was carried out according to DIN ISO 14044. Specific data from the company RHEINZINK in Datteln, Germany, and from the database Sphera LCA FE were used. The LCA was carried out for the manufacturing phase of the products, taking into account all background data such as raw material production and transports ('cradle to gate'). The use phase of the titanium zinc sheets is divided into several application areas: roofing applications, roof drainage and facade claddings. The treatment for the titanium zinc sheets was modelled in re-melting furnaces for the end-of-life phase. The thereby resulting credit of extracted zinc is counted as replacement for primary zinc. System boundary: Type of the EPD: cradle to gate - with options. In this study, the product stage information modules A1, A2, and A3 are considered. These modules include the production of raw material extraction and processing (A1), processing of secondary material input (A1), transport of the raw materials to the manufacturer (A2), manufacturing of the product (A3) and packaging materials (A3). Modul A5 covers the waste treatment of packaging materials (incineration of paper, plastic and wood). The special high-grade zinc allows an input of secondary material of 1.5% zinc scrap. The post-consumer scrap is used to saturate this input and is discounted from the material flow of module D. The transport to module C4 is considered under module C2. There is no activity declared for C1. Module C4 considers the non-recovered scrap due to losses and sorting efficiency as described in 2.15. There is no activity in C3. The EoL of the product (Module D) is also included. The treatment (remelting process of zinc scrap) and credits for avoided primary production are grouped into module D. |
| Technical purpose of product or process | • Titanium zinc sheets, strips and profiles for roofing and facade cladding according to EN 14782 -Self-supporting metal sheet for roofing, external cladding and internal lining according to EN 14783 - Fully supported metal sheet and strip for roofing, external cladding and internal lining. The products are CE-marked based on these standards. • Roof drainage systems (roof gutters, pipes and accessories) according to EN 612 - Eaves gutters with bead stiffened fronts and rainwater pipes with seamed joints made of metal sheet. |
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| General comment on data set | The basis of RHEINZINK®-prePATINA is electrolytic special high-grade zinc in accordance with EN 1179. Added to this are small amounts of titanium and copper based on EN 988. In addition to other factors, the alloy composition is not only important for the technological material properties of RHEINZINK®, but also for the colour of its patina. The RHEINZINK®-prePATINA blue-grey and graphite-grey surface is the result of a chemical pickling process. This preweathering process anticipates the colour of the typical natural patina, which will develop during the period of use. For the placing on the market in the EU and European Free Trade Association (EFTA) (with the exception of Switzerland) the Regulation (EU) No. 305/2011 applies. The products need a Declaration of Performance taking into consideration EN 14782 or EN 14783 respectively and the CE-marking. For the application and use the respective national provisions apply. |
| Copyright | Yes |
| Owner of data set | |
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| Data set valid until | 2029 |
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| Technology description including background system | Structure of the manufacturing process: The manufacturing process comprises seven steps: Pre-alloy: To improve the quality, and for energy-saving reasons, a pre-alloy is produced at 760 °C in an induction crucible (melting of SHG zinc, copper, titanium and aluminium). The pre-alloy blocks produced contain the titanium and copper portions of the subsequent rolled alloy. Melting: The pre-alloy blocks and SHG zinc are melted together in large melting furnaces (induction furnaces) at 500 – 550 °C and mixed by induction currents. Casting: The final alloy is cooled down below melting point by a closed water circuit in the casting machine, resulting in a solid cast string. Rolling: There is a cooling distance between casting machine and roller racks. The rolling is done by 5 roller pairs, so-called roller racks. With adequate pressures the material thickness is reduced by up to 50% at each of these roller racks. Simultaneously, the material is cooled and greased using a special emulsion. Coiling: Subsequently, the finished rolled RHEINZINK® is wound up into coils of 20 tonnes. They are still at a temperature of 100-150 °C and are stored for further cooling. Preweathering: The surface appearance is achieved by a pickling process. The material is degreased, rinsed, then pickled in an acidic pickling bath, rinsed again, and then provided with a thin antifingerprint coating (1-2 µm thickness). The process is identical for bluegrey and graphite grey, the difference in colour results from the different copper concentration. Stretching and cutting: The tensions developed inside the RHEINZINK® bands during rolling are 'stretched-out' by a stretching-bending-straightening process. Quality control: Control by the manufacturer and by TÜV Rheinland Group. Control of zinc material according to the QUALITY ZINC list of requirements as set up by TÜV Rheinland Group. Quality management control according to /ISO 9001/. Technical data: The following table gives conversion data from product surface mass per unit area for the relevant product systems in roofing, facade cladding and roof drainage. Performance data of the product in accordance with the respective declaration of performance with respect to its essential characteristics according to EN 14782 and EN 14783 respectively. |
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Modelling and validation
Administrative information
Environmental indicators