T/CNFPIA 4018-2024 Calculation and Labeling of Carbon Storage in Wooden Materials of Buildings

Scope

Scope: This document defines the terms and definitions, calculation methods, and labeling requirements for calculating and marking the carbon storage of wooden materials in buildings. This document applies to the calculation and labeling of carbon storage in wooden materials in buildings. Main technical content: 3. Terms and definitions The terms and definitions defined in LY/T 1788 and the following terms and definitions apply to this document. 3.1 Building wooden materials Wooden materials used in building construction, including timber, plywood, particle board, fiberboard, etc. 3.2 Carbon storage labeling A general term for the form of representing the carbon storage of wooden materials used in buildings, which can be expressed in text, symbols, or other forms. 4. Calculation methods The calculation method for the carbon storage of various wooden materials in buildings shall be in accordance with T/CNFPIA 2003–2023. The total carbon storage of wooden materials in buildings shall be calculated according to Equation (1): (1) Where: PCO2 – The carbon storage of wooden materials in buildings, in tons of carbon dioxide (t CO2); M0 – The absolute dry mass of timber used in the building, in kilograms (kg); m – The number of types of wooden materials used in the building, dimensionless; fCi – The carbon content of the i-th type of wooden material used in the building, in kilograms of carbon per kilogram (kg C/kg); Mi – The absolute dry mass of the i-th type of wooden material used in the building, in kilograms (kg); 0.5 – The carbon content of the timber used in the building, in kilograms of carbon per kilogram (kg C/kg); 44/12 – A constant for converting carbon (C) to carbon dioxide (CO2), which is the ratio of the molecular weight of CO2 to that of C, dimensionless. 5. Labeling requirements 5.1 Principles 5.1.1 All content labeled on the label shall be accurate, scientific, and easy to understand. 5.1.2 The text, symbols, or

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