Summary of key information from the technical manual of Chongqing Huaxia Windows and Doors Co.,Ltd and Chongqing Huaxia Windows and Doors Co.,Ltd
2026-05-20
I. Company Overview
Chongqing Huaxia Windows and Doors Co., Ltd., as a long-term practitioner in the field of structural steel structures, has formed a comprehensive service potential, the core of which is technology. The company consists of Chongqing Huaxia Windows and Doors LLC and Chongqing Huaxia Windows and Doors LLC, operating on an integrated management model and ensuring autonomous production based on its own large modern processing plant.
Over 30 years of deep work in the industry, the company has accumulated rich engineering experience and production capabilities, with the ability to closed-loop control of the entire production chain - from design and production to installation. This model effectively guarantees stability of quality and controllability of project deadlines, which laid the foundation for the company’s service advantages in the industrial and commercial construction market.
Although the specific list of management personnel has not been disclosed, their ongoing involvement in the development of government standards suggests that the company has a stable and professional team of technical specialists to ensure long-term technology transfer and innovation.
II. Industry status and contribution to standards development
Based on the above-mentioned experience, the company demonstrates significant influence on the formation of industry regulations, being an important participant in the system of state and local standards.
At the level of state standards, the enterprise, as the main developer, took a deep part in drawing up the standard “Energy-saving windows and doors for buildings. Part 3: Windows and doors made of steel-plastic composites" (GB/T 29734.3-2020), acted as a key drafter of the main standard "Steel-plastic co-extruded windows and doors" (JG/T 207-2007), and also participated in the revision of the standard "Steel windows and doors" (GB/T 20909-2017).
In the development of local standards, the enterprise has initiated or led the development of several key technical regulations of Chongqing City, including the Technical Standard for the Application of Exterior Windows and Doors in Civil Buildings (DBJ50/T-065-2020), the Technical Standard for the Application of Energy-Saving Non-ferrous Steel Windows and Doors (DBJ50/T-089-2020), and the recently published Technical Standard for the Application of Standardized Window and Door Systems in Civil Buildings. (DBJ50/T-499-2024).
In addition, the company is actively involved in the development of standards such as “Evaluation of green building materials” and “Technical regulations for the reconstruction of external windows and doors of existing buildings”, and also carries out the task of compiling collections of standard drawings for windows and doors made of non-ferrous steel for industrial workshops and energy-saving structures, which further strengthens its position as a technological leader.
III. Research potential in state-level projects
Based on deep experience in developing standards, the company, as an executor of government scientific and technical projects, demonstrates outstanding capabilities in the field of R&D and innovation. As the sole implementer of the scientific and technological project of the Ministry of Construction, Chongqing Huaxia Windows and Doors Co., Ltd. has achieved breakthrough results in the field of energy-saving non-ferrous steel windows and doors, cementing itself as the technology leader of the industry.
3.1 Rationale for the Ministry of Construction’s task statement and project review
The energy consumption of windows and doors accounts for more than 30% of the total energy consumption of buildings, so research into energy-efficient designs is important to promote energy efficiency in construction. In this regard, in 2006, Chongqing Huaxia Windows and Doors Co.,Ltd submitted an application to the Ministry of Construction to develop the project "Energy-saving windows and doors made of non-ferrous steel profile", which was successfully included in the national scientific and technological development plan.
In 2007, this project was officially included in the “2007 Science and Technology Project Plan of the Ministry of Construction” (Jianke Document [2007] No. 114), project number 2007-K1-15. Chongqing Huaxia Windows and Doors LLC, being the sole contractor, bore full responsibility for the planning, implementation and delivery of the project. The project manager was senior engineer Zhang Rongxi.
3.2 Joint development mechanism under the leadership of the Chongqing City Construction Committee
The Chongqing City Construction Committee, as the local competent authority, paid close attention to this project and provided full support at all stages. On January 15, 2008, the Chongqing City Construction Committee sent the “Report on the Application for Organizing the Acceptance of the Scientific and Technological Project of Energy-Saving Non-ferrous Steel Windows and Doors” (Yu Jian Han 〔2008〕 No. 17) to the Department of Science and Technology of the Ministry of Construction, officially requesting the acceptance of the project.
During the implementation of the project, the Chongqing City Construction Committee performed the functions of guiding, managing and supervising the research work, helping to carry out the project according to plan and achieve the set goals. The acceptance application report confirms that all research and development work on the project has been completed, the technical problem of thermal break profiles for non-ferrous steel windows and doors with double-glazed windows in the domestic market has been successfully solved, and the technical performance indicators meet the requirements of Jian Ke Document 〔2007〕 No. 114.
3.3 Project acceptance results
On January 26, 2008, the Science and Technology Department of the Ministry of Construction held a project acceptance meeting in Chongqing. The chairman of the acceptance committee was researcher Jiang Ren from the Institute of Building Physics of the Chinese Academy of Construction Research.
The acceptance committee experts heard a report from the project team, studied technical documentation, including the acceptance report, and became familiar with the production process at the facility. After careful discussion, the following acceptance conclusions were formulated:
1. The acceptance documentation provided by Chongqing Huaxia Windows and Doors Co., Ltd. is complete and meets the acceptance requirements;
2. The technology of this project has reached the advanced domestic level;
3. A new technological breakthrough has been made in the field of energy-saving doors and windows made of non-ferrous steel;
4. Availability of conditions for mass production;
5. It is recommended to further improve and optimize the technological system of energy-saving windows and doors made of non-ferrous steel.
The acceptance committee unanimously agreed to accept the work.
3.4 Key technological advances and innovations
As part of the project, a number of technological innovations were implemented in the field of energy-saving windows and doors made of non-ferrous steel, and a complete system of proprietary intellectual property rights was formed.
Technical characteristics and innovative aspects are presented in the table below:
| Number | Specifications and Innovations |
| 1 | Innovative structure of the composite profile: steel-plastic or steel-wood composite profiles are used, where there are steel profiles on the sides and a plastic or wooden hollow thermal insert in the middle. They are mechanically joined together to form steel-plastic or steel-wood composite profiles, as well as doors and windows with a thermal insulation effect. |
| 2 | Use of highly effective thermal insulation materials: plastic thermal inserts are made from modified PVC or thermosetting materials. Modified PVC has increased heat resistance compared to conventional PVC, its softening temperature is ≥80°C. The use of thermoset plastic to make the thermal inserts prevents them from softening when heated, providing excellent resistance to high temperatures. |
| 3 | Advanced surface treatment technology for steel profiles: Adopting a multi-stage painting process including mechanical pre-treatment, etching, phosphating, electrophoresis priming, finishing and curing, guarantees excellent corrosion resistance and weather resistance of the profile. |
| 4 | Ease of installation: the window and door system provides for the installation of glass using glazing beads, which facilitates adjustment, dismantling and subsequent maintenance. |
| 5 | High structural strength: the main material is steel, which makes the finished products highly resistant to wind loads and suitable for use in high-rise buildings and regions with strong winds. |
| 6 | High economic efficiency: the relatively low cost of steel allows you to achieve excellent performance while maintaining a favorable price. |
| 7 | High degree of integration of patented technologies: The system includes many patents on production methods, profile structure and specialized equipment, forming its own intellectual property system, including 2 national invention patents. |
| 8 | Rich results in the field of building a standardization system: 3 technical regulations and 2 corporate standards were developed, which laid the foundation for subsequent advancement. |
3.5 Industrial implementation of scientific and technical results and economic efficiency
The results of this project were successfully industrialized, which led to significant economic and social effects.
Information on the release of scientific and technical results is presented in the table below:
| Result type | Quantity | Detailed information |
| New product | 2 pcs. | A series of energy-saving windows and doors made of colored steel |
| New technology / new process | 8 pcs. | Composite molding technology, thermal break technology, high-performance compaction technology, etc. |
| New materials | 8 types | Modified PVC insulating tapes, thermosetting plastics, high-performance paints and varnishes, etc. |
| Standards development | 5 points | 3 technical specifications, 2 corporate standards |
| Patents | 2 points | 2 domestic invention patents |
| Pilot line | 1 entry | Support for small-scale test production |
| Production line | 11 types | Support industrial production of products of various specifications |
Cost-effectiveness data is presented in the table below:
| Indicators | Data |
| Number of commercialized results | 6 points |
| Number of results implemented in practice | 9 points |
| The resulting cumulative economic effect | 21.25 million yuan |
| Added value | 1000 million yuan |
| Added profit and taxes | 255 million yuan |
In terms of forming a project team, there are a total of 20 researchers, of which 5 have senior ranks, 6 have intermediate ranks, 1 has a master's degree, which has formed a technical R&D team with a rational structure and high professional competence.
3.6 Technical background and contributions to the industry
The results of this project are the technical source for the subsequent national standard GB/T 29734.3-2020 “Energy efficient doors and windows for buildings. Part 3: steel-polymer composite doors and windows." Chongqing Huaxia Windows and Doors Co., Ltd., through the successful implementation of the project, overcame the industry's key technological bottleneck - "thermal bridge profiles for panel doors and windows with single insulated glass chambers", creating a technological barrier based on "steel-polymer composite" as the core technology.
In the field of industrialization, the company has built one pilot production line and 11 types of production lines, making the leap from laboratory results to industrial production. Based on the results of this project, the company actively participated in the development of numerous national and local standards for doors and windows, establishing its technological leadership position in the field of energy-efficient doors and windows.
The successful implementation of the project not only demonstrated the powerful technical potential of Chongqing Huaxia Windows and Doors Co., Ltd. as the executor of the national scientific and technological project, but also created a solid foundation for further continuous improvement of production capabilities in key technologies.
IV. Core manufacturing competencies in key technologies
Based on the establishment of a standardization system, the enterprise transforms its technical advantages into feasible production capabilities, building a high-precision and highly flexible production complex.
4.1 Precision machining capabilities
The company has a complete independently controlled technological chain, covering cutting of raw materials, precision welding, CNC bending and surface processing; All operations are carried out on our own large modern production site. The system supports custom assembly of complex structural parts, being particularly adept at machining and welding from drawings with high tolerance requirements.
With full control over the production chain, the company is able to ensure consistent product quality and flexibly respond to customers' individual needs, providing a complete engineering path from drawing conversion to mass production.
4.2 End-use examples and technology comparison
The given examples confirm the ability of the enterprise to adapt in multi-scenario conditions with high requirements and its reliability, which serves as empirical confirmation of its key technological competencies.
| Scope of application | Partners | Processed products | Technological capabilities |
| Industrial equipment | Weichai Power | GUV valve boxes, oil pans, brackets/bases, water pipes, guards | Industrial grade production of fluid control components, load-bearing structures and welding of complex curved surfaces |
| Rail transport | Chongqing Rail Transit Co., Ltd. | Intersectional barriers, evacuation platform components, special door structures | Meets stringent standards for fire, vibration and weather resistance; opportunities to implement large government construction projects |
| Civil defense | Chongqing Jiangjin Turbocharger Plant, etc. | Security door frames, special sealing components, steel structures for sealed passages | Deep technological experience in creating protection systems from high-strength steel structures |
V. Core Business System
Based on its production capabilities, the company has established a clear core business structure focused on system solutions in two areas: steel structures and windows and doors.
5.1 Design of steel structures
The main activities cover such areas as heavy industrial workshops, public buildings of non-standard shapes and modular prefabricated buildings. By leveraging its long-span, heavy-duty design capabilities, coupled with precision CNC machining technology to realize complex assemblies, the company addresses the dual demands of modern architecture for space efficiency and structural safety.
5.2 Window and door units
All window and door products are developed in strict accordance with state and regional standards. Production is carried out in our own factories, which guarantees full compliance with system characteristics and high accuracy of installation on site.
| Main products | Functional Features | Technological base |
| Fiberglass windows and doors made of colored steel | Excellent thermal insulation, sound insulation and airtightness | Precision engineered based on national and regional standards, factory manufactured for perfect accuracy |
| Filled windows and doors made of colored steel | Strengthening the structure and energy-saving modernization | Internal filling technology improves overall strength and thermal performance |
| Colored steel façade glazing systems | Combination of architectural aesthetics and functionality | Supports a variety of design options and high-performance building envelopes |
VI. Strategic cooperation and market positioning
Thanks to its reliable ability to implement technical solutions, the company has established stable partnerships with high-quality clients, forming a clear structure of market strategy.
6.1 Strategic partners
The enterprise has established long-term cooperation with companies such as Changan Automobile, Weichai Power (Shandong/Chongqing), Chongqing Jiangjin Turbocharger Plant, Chongqing Rail Transit Co., Ltd. and others. These clients come from high-tech industrial sectors such as automotive, power generation equipment and rail transport, reflecting the high level of market acceptance of the company's quality control and ability to meet its commitments.
6.2 Market positioning
The business's primary focus is on the commercial fit-out market, covering office buildings, mixed-use commercial complexes and various types of industrial plants. The target audience includes real estate developers, general contractors and direct customers (property owners). The overall strategy is focused on B2B services in the engineering and construction sector, with an emphasis on providing complete system solutions rather than retail sales, consistent with a “technology and manufacturing” development model.
VII. Vision for future development
In the future, the enterprise will continue to deepen environmental transformation and introduce technological innovation, contributing to building capacity in the field of sustainable development.
7.1 Development of green smart manufacturing
In the field of green modernization, the company is actively involved in the development of Green Building Materials Assessment standards, aiming to promote the application and adoption of low-carbon and environmentally friendly technologies. The technology innovation track focuses on the “refurbishment of exterior windows and doors of existing buildings”, which aims to provide standardized and modular renovation solutions to support urban renewal and building energy efficiency goals.
7.2 Strategic conclusion
Chongqing Huaxia Windows and Doors Co.,Ltd adheres to the core concept of "define quality through standards, fulfill obligations through production." Backed by 30 years of technology expertise, standards development practices and precision manufacturing capabilities, the company strives to become the nation's leading provider of structural steel solutions, window and door systems.
