GB21351-2023
The norm of energy consumption per unit production of wrought aluminium and aluminium alloys
变形铝及铝合金单位产品能源消耗限额
GB 21351-2023 is a current mandatory Chinese national standard for The norm of energy consumption per unit production of wrought aluminium and aluminium alloys. It appears in the Construction compliance cluster with a energy efficiency focus and has an implementation date of Jun 1, 2024.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to the calculation, assessment, and control of energy consumption for general industrial wrought aluminium and aluminium alloy products, including ingots, plates, strips, foils, tubes, bars, profiles, wires, and forgings. It is mandatory for all manufacturers of these products in China. It does not apply to special fields such as aerospace, or products made by special processes like powder metallurgy and spray forming.
Technical requirements
The standard classifies wrought aluminium and aluminium alloy products into Category I and Category II based on production energy consumption differences. It specifies the energy consumption limit grades for various products, including flat ingots, round ingots, plates, strips, foils, extruded tubes, extruded bars/profiles, drawn tubes/bars/wires, surface-treated profiles, composite profiles, and forgings. For each product category, the standard defines three energy consumption limit grades, where Grade 1 represents the lowest energy consumption. The limits are differentiated based on raw materials (e.g., molten aluminium vs. remelting ingots) and production processes (e.g., hot rolling, cold rolling, extrusion, forging, and subsequent heat treatments like annealing or solution heat treatment). The standard also outlines specific technical requirements for existing facilities and new or expanded facilities. Existing enterprises must comply with the Grade 3 limits, while new and expanded projects must meet the stricter Grade 2 limits.
Testing methods
The standard details the statistical scope and calculation methods for energy consumption. It requires calculating the comprehensive energy consumption per unit product by summing the energy consumed in the main production system, auxiliary production systems, and附属 production systems, minus any recovered secondary energy supplied externally. The calculation uses standard coal equivalent coefficients, which can be based on measured values or referenced from national statistical data as provided in the appendices.
FAQs
What products are regulated under GB 21351-2023?
GB 21351-2023 regulates the energy consumption of wrought aluminium and aluminium alloy products, including ingots, plates, strips, foils, tubes, bars, profiles, wires, and forgings used in general industrial applications.
Are there any updates from the previous version of GB 21351?
Yes, GB 21351-2023 replaces GB 21351-2014, GB 25326-2010, GB 26756-2011, and GB 31339-2014. It expands the scope to include ingots, plates, strips, foils, extruded tubes, general industrial profiles, and forgings, and updates the energy consumption limit grades and calculation methods.
What are the energy consumption limit grades in GB 21351-2023?
The standard establishes three grades of energy consumption limits for each product category, with Grade 1 being the most energy-efficient. Existing facilities must meet Grade 3 limits, while new or expanded facilities must meet Grade 2 limits.
The summary above provides a high-level overview of GB 21351-2023. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 21351-2023 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Management
- CCS
- F01
- ICS
- 27.010
- Competent department
- Standardization Administration of China
- Technical committee
- National Technical Committee on Energy Fundamentals and Management of Standardization Administration of China
Relationships
Replaces:GB 21351-2014, GB 25326-2010, GB 26756-2011, GB 31339-2014