本文件通过定义所有类型工艺路线的边界、CO2排放系数和中间产品，为计算所有类型工艺路线的钢铁厂的CO2强度提供了指导，其中上游排放被考虑到了所有类型工艺路线的上游。特别是，本文件为以下列出的钢铁厂类型提供了适用于ISO 14404系列的指南。本文件还包括通用计算表，涵盖了ISO 14404-1、ISO 14404-2和ISO 14404-3的所有相关排放源，以帮助计算CO2排放量。 我。与ISO 14404-1、ISO 14404-2和ISO 14404-3（7.2.1）不同工艺路线的钢铁厂 二。有一条以上工艺路线的钢铁厂（7.2.2） 三。钢厂从外部采购生铁（7。2.3) 四。钢铁厂、重轧机向外采购部分或全部粗钢（7.2.4） 此外，本文档为整个ISO 14404系列的以下主题提供了额外的指导。 a)出口炉渣评价 b)副产物气体的评价 c)库存评价 d)电力和燃料的热值和排放因子的选择 可使用附件A获得能源消耗和消耗效率的换算。 虽然计算结果的使用超出了本文件的范围，但附录B中建议了适当的应用和不适当的应用。

This document provides guidance for calculating the CO₂ intensity at steel plants with all types of process routes, by defining the boundary, CO₂ emission factors and the intermediate products for which upstream emissions are considered for all types of process routes. In particular, this document provides guidance applicable to the ISO 14404 series to the types of steel plants listed below. This document also includes the Universal Calculation Sheet, which covers all relevant emission sources from ISO 14404-1, ISO 14404-2 and ISO 14404-3 to assist the calculation of CO₂ emissions. i. Steel plants with different process routes from ISO 14404-1, ISO 14404-2 and ISO 14404-3 (7.2.1) ii. Steel plants with more than one process route (7.2.2) iii. Steel plants purchasing pig iron from the outside (7.2.3) iv. Steel plants and rerollers purchasing part or all of crude steel from outside (7.2.4) Moreover, this document provides additional guidance to the entire ISO 14404 series for the following topics. a) Evaluation of exported slags b) Evaluation of by-product gas c) Evaluation of stock d) Selection of calorific values and emission factors for electricity and fuel Conversion to energy consumption and to consumption efficiency can be obtained using Annex A. While the use of the calculation result is outside the scope of this document, appropriate applications and inappropriate application are recommended in Annex B.