TfS/Cefic 化工行业产品碳足迹指南（2024）

碳 Chapter 5 — cradle-to-gate system boundary

The product system of the cradle-to-gate PCF is the sum of GHG emissions, expressed as CO2 equivalents related to a product, from the extraction of resources to the gate of the reporting company, including transportation. The boundary of a cradle-to-gate life cycle inventory shall not include product use or end-of-life processes. The PCF calculation may include the transportation to the customer, but the respective GHG emissions must be stated as additional information separately from the cradle-to-gate PCF. — Reference: TfS PCF Guideline v3, chapter 5.

从摇篮到大门 PCF 的产品系统，是与产品相关的、自资源开采至报告企业大门（含运输）的温室气体排放总和，以 CO2 当量表示。从摇篮到大门的生命周期清单边界不得包含产品使用或报废过程。PCF 计算可包含运往客户的运输，但相应温室气体排放须作为附加信息、与从摇篮到大门 PCF 分开列示——依据 TfS PCF 指南 v3 第 5 章。

碳 Chapter 4 — Scope 3.1 purchased goods and services

For chemical companies, the most emissions-intensive purchased goods are often raw materials used and transformed into products. For annual corporate reporting, the PCF values of each purchased good are aggregated to one value and reported in the category Scope 3.1. Based on the PCF information for those purchased goods, companies calculate the PCF for their end products to achieve a cradle-to-gate result, which becomes the calculation basis for the next producer in the supply chain. — Reference: TfS PCF Guideline v3, chapter 4.

对化工企业而言，排放最密集的采购货物往往是用于并转化为产品的原材料。在年度企业报告中，各采购货物的 PCF 值汇总为一个数值并在范围 3.1 类别中报告。企业基于这些采购货物的 PCF 信息计算其终端产品的 PCF，以得到从摇篮到大门的结果，该结果成为供应链中下一生产者的计算基础——依据 TfS PCF 指南 v3 第 4 章。

碳环境 Chapter 5.3.3 — no comparative assertions from a partial PCF

A PCF calculated using this guideline alone cannot be used in comparative assertions on products. Because the PCF covers only one impact category relevant to an LCA study and is calculated as a partial (cradle-to-gate) PCF, it may miss impacts arising from other life cycle stages or other impact categories and may therefore not provide a comprehensive and complete picture for making comparative assertions. — Reference: TfS PCF Guideline v3, chapter 5.3.3.

仅依据本指南计算的 PCF 不得用于产品间的比较性主张。由于 PCF 仅覆盖 LCA 研究中的一个影响类别，且按部分（从摇篮到大门）PCF 计算，其可能遗漏其他生命周期阶段或其他影响类别产生的排放，因而可能无法为比较性主张提供全面完整的图景——依据 TfS PCF 指南 v3 第 5.3.3 章。