GB21340-2019
The norm of energy consumption per unit products for glass products and cast stone
玻璃和铸石单位产品能源消耗限额
GB 21340-2019 is a current mandatory Chinese national standard for The norm of energy consumption per unit products for glass products and cast stone. It appears in the Construction compliance cluster with a energy efficiency focus and has an implementation date of May 1, 2020.
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 and assessment of energy consumption for flat glass produced via the float process, tempered glass via horizontal tempering, ultra-white patterned glass for photovoltaics, and cast stone products. It is mandatory for existing, new, and expanded manufacturing facilities within these categories. However, it does not apply to ordinary patterned glass, wired glass, special glass for aerospace/electronics, automotive tempered glass, chemically tempered glass, or non-horizontal tempered glass.
Technical requirements
The standard establishes a tiered energy consumption limit system, categorizing limits into three grades where Grade 1 represents the lowest energy consumption. Existing facilities must comply with the Grade 3 limits, while new or expanded projects must meet the stricter Grade 2 limits. This dual-tier approach ensures continuous improvement in energy efficiency across the industry. Specific energy consumption metrics are defined for different product types, including comprehensive energy consumption per unit for flat glass (measured in kgce/weight box), electricity consumption per square meter for tempered glass, and energy consumption per ton for both photovoltaic patterned glass and cast stone. The standard also introduces specific correction coefficients for specialized production lines, such as those dedicated to automotive flat glass, accounting for factors like capacity utilization and glass thickness. Additionally, the standard specifies furnace age coefficients and fuel equivalence coefficients to adjust energy consumption calculations accurately based on the operational phase of the melting furnace and the type of fuel used (e.g., fuel oil, natural gas, petroleum coke). These adjustments ensure a fair and precise assessment of energy performance.
Testing methods
The standard outlines specific statistical scopes and calculation methods for each product category. It references GB/T 2589 for general comprehensive energy consumption calculation principles and GB/T 36267 for testing energy consumption of tempered glass. The statistical scope includes energy used in main production processes (melting, forming, annealing, cutting) and auxiliary services, while excluding energy used for cold repairs, residential facilities, and infrastructure.
FAQs
What products are regulated under GB 21340-2019?
It regulates energy consumption for flat glass, tempered glass (horizontal method), photovoltaic patterned glass, and cast stone.
What is the difference between the requirements for existing and new facilities?
Existing facilities must meet the Grade 3 energy consumption limits, whereas new or expanded facilities must comply with the more stringent Grade 2 limits.
Does the standard provide correction factors for specific production conditions?
Yes, it includes correction coefficients for automotive flat glass production lines, as well as furnace age coefficients and fuel equivalence coefficients to adjust the calculated energy consumption.
The summary above provides a high-level overview of GB 21340-2019. 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 21340-2019 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 21340-2013, GB 29451-2012, GB 30252-2013