GB29450-2012
The norm of energy consumption per unit product of glass fibers
玻璃纤维单位产品能源消耗限额
GB 29450-2012 is a current mandatory Chinese national standard for The norm of energy consumption per unit product of glass fibers. It appears in the Construction compliance cluster with a energy efficiency focus and has an implementation date of Oct 1, 2013.
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 energy consumption calculation and assessment of C-glass or E-glass marble production enterprises, as well as E-glass, ECR-glass, and C-glass fiber manufacturers using the pool kiln method or crucible method. It also covers energy consumption control for new construction projects. This standard is not applicable to special glass fibers, such as high-strength, high-silica, or alkali-resistant glass fibers.
Technical requirements
GB 29450-2012 establishes mandatory energy consumption limits for the production of glass fibers and glass marbles. The standard categorizes requirements into three tiers: limiting values for existing facilities, access values for new enterprises, and advanced values for industry leaders. For the pool kiln method, the standard sets specific comprehensive energy consumption limits per unit output based on fiber diameter categories (e.g., ≤9μm and >9μm) for E-glass and ECR-glass yarns. Manufacturers must ensure their unit product energy consumption does not exceed the specified mandatory thresholds. For the crucible method, the requirements are divided into marble-making and drawing processes, with distinct limits for alkali-free and medium-alkali glass marbles. The standard also outlines energy management and technical measures, such as adopting oxy-fuel combustion and waste heat recovery.
Testing methods
The standard outlines specific statistical scopes and calculation methods for determining comprehensive energy consumption. It requires converting various energy sources into standard coal equivalent using reference coefficients provided in the appendices. The calculation scope covers the entire production process from raw material metering to finished product warehousing. Enterprises must calculate energy consumption separately for different processes and product types to ensure accurate compliance reporting. Energy metering must comply with GB 17167.
FAQs
What products are regulated under GB 29450-2012?
The standard regulates E-glass, ECR-glass, and C-glass fibers, as well as C-glass and alkali-free glass marbles produced via the pool kiln method or crucible method. It excludes special glass fibers like high-strength or high-silica fibers.
Are the energy consumption limits in GB 29450-2012 mandatory?
Yes, clauses 4.1 and 4.2 regarding the limiting values for existing facilities and access values for new enterprises are mandatory. Manufacturers must strictly adhere to these thresholds to operate legally in China.
How is the comprehensive energy consumption calculated under this standard?
Comprehensive energy consumption is calculated by converting all input and output energy sources into standard coal equivalent (tce). The calculation covers both production and auxiliary production systems, with specific formulas provided for glass marbles and glass yarns based on actual or converted output.
The summary above provides a high-level overview of GB 29450-2012. 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 29450-2012 today to access all detailed parameters, calculation formulas, and energy conversion tables.
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