YOUR STEEL STRUCTURE ENGINEERING EXPERT
We are a steel structure fabricator and EPC contractor based in Jining, Shandong, China, with 17 years of experience since 2009 and delivered projects in 60+ countries. Shandong Shijie Heavy Industry Co., Ltd. and its sister company, Henan Hengfeng Steel Structure Engineering Co., Ltd., operate as one manufacturing group under the same ultimate ownership. SynJect is the group’s export brand.
Suppliers of Energy-Saving Insulation
Leveraging our own production facilities, we offer direct-from-manufacturer supply, ensuring reliable quality through proven processes and rigorous standards. Our products are specifically designed for steel structure maintenance, featuring excellent weather resistance and ease of application. They provide long-lasting, stable protection for steel structures, helping to enhance project quality and efficiency. Combining multiple properties such as thermal insulation, fire resistance, and anti-aging, these products are easy to install and highly adaptable, fully meeting the maintenance and renovation needs of steel structures across various applications.
Factory Direct ＆ Reliable Quality For Steel Structure Maintenance
Core Features & Advantages
As a professional manufacturer and supplier of energy-saving insulation wool, we operate directly from our own factory, maintaining full control over the entire process—from raw material procurement to production and finished product testing. Leveraging our proven manufacturing processes and consistent production capacity, we provide customers with reliable, high-quality insulation products. Combining thermal insulation, fire resistance, moisture resistance, and anti-aging properties, our products effectively improve building energy efficiency and protect steel structures from environmental damage, while offering the advantages of easy installation and broad applicability.
♦ Directly supplied from the manufacturer, offering significant cost advantages
♦ Strict quality control ensures consistent product performance and reliable quality
♦ Excellent thermal insulation properties effectively reduce building energy consumption
♦ Fire-resistant, moisture-proof, and weather-resistant, extending the service life of steel structures
♦ Easy to cut and install, suitable for a wide range of steel structure maintenance applications
Applications
Suitable for routine maintenance and repair projects on steel structures within industrial sites and parks, including mechanical workshops, electronics facilities, food processing plants, and chemical processing plants—all of which have high requirements for thermal insulation, fire resistance, and moisture protection. It can also be used for thermal insulation and heat protection on steel structure utility tunnels, equipment supports, and outdoor steel frameworks, thereby enhancing the structures’ weather resistance, delaying corrosion and aging, and ensuring their long-term safe and stable operation.
♦ Facility maintenance at industrial sites in the chemical, power, and equipment manufacturing sectors
♦ Thermal insulation installation for prefabricated buildings and temporary steel structures
♦ Protection of steel roofs, exterior walls, and platforms
♦ Steel structure maintenance and insulation for warehousing and logistics centers, large warehouses, and cold storage facilities
Vision & Mission
We are committed to providing safe, efficient, and environmentally friendly solutions for global customers through continuous technological innovation and exceptional product quality, driving industry progress and collectively creating a better future.
CONTACT
MORE PRODUCTS
SHANDONG SHIJIE HEAVY INDUSTRY CO., LTD
Headquartered in the High-Tech Development Zone of Jining, Shandong Province, Shandong Shijie Heavy Industry Co., Ltd. and its sister company, Henan Hengfeng Steel Structure Engineering Co., Ltd., operate as a unified manufacturing group under the same ultimate ownership. Globally, we deliver our end-to-end solutions through our dedicated export brand, SynJect.
Drawing on 17 years of export expertise and a proven track record across more than 60 countries, we provide integrated EPC contracting and heavy fabrication. This global reach is backed by our robust manufacturing footprint: an 80,000 m² facility with an annual capacity exceeding 500,000 tons, RMB 120 million in registered capital, and a skilled workforce of over 600 professionals.
Our core expertise spans civil construction, petrochemical facilities, long-distance pressure pipelines, heavy steel structures, pressure vessels, and skid-mounted refueling stations.
PRICE YOUR BUILDING
INDUSTRIAL STEEL BUILDINGS
