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General comment The values determined to calculate A3 originate from verified Progress LCI inventory data. A1 values were prepared considering steel products characteristics based on Ecoinvent data. Allocation for steel production impacts is done in accordance with LCI data for Steel products Report compiled by Brayan Hughes and William Hare (2012 for World Steel Association).
The background data for the processes come from the following databases: Ecoinvent v.3.8 (steel, zinc, nitrogen, HCl, WWD, ancillary items, packaging) and ZSE (Slovak electricity mix and combustion factors for fuels). Specific (LCI) data quality analysis was a part of the audit. The time related quality of the data used is valid (5 years).
The allocation rules used for this EPD are based on general ITB PCR A. Production of Fortifix® is a line process in a manufacturing plant located at Hlohovec, Slovakia (see Figure 2). Allocation of impacts is done on product mass basis where no specific allocation for Fortifix® production based on manufacturer information was provided. All impacts from raw materials production (wire rod, yarns, non-woven, WWD lubricants, HCl, Inhibitor, nitrogen, Zn blocks, foil, pallets) are allocated in A1 module of the LCA. Minimum 99% of the impacts from a line production were allocated to the product covered by this declaration. Module A2 includes product specific (100%) transport of raw materials such as steel (and other) from supplier to manufacturing plant (Hlohovec). Municipal wastes of the factory were allocated to module A3 (mass allocation). Specific energy use and electricity (ZSE) was inventoried and 100% was allocated to the product assessed. Emissions in the factory are assessed using Ecoinvent data for energy carriers.
Minimum 99% input materials and 100% energy consumption (electricity, gas) were inventoried in the factory and were included in the calculation. In the assessment, all significant parameters from gathered production data are considered, i.e. all material used per formulation (main input is steel Wire Rod), utilized thermal energy, and electric power consumption, direct production waste and available emission measurements. Tires consumption for transport was not taken into account. Substances with a percentage share of less than 1% of total mass (borax, serdet, anthractite, salt, vermiculite) were excluded from the calculations. It is assumed that the total sum of omitted processes does not exceed 0,5% of all impact categories. In accordance with EN 15804 machines (for example Widia Dies) and facilities (capital goods) required for and during production are excluded, as is transportation of employees.
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