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Big Carliber Composite Steel Pipe |
Our company proudly presents the Reinforced Spiral Welded Steel Pipe, an innovative solution designed specifically for underground gas drainage in coal mines. This state-of-the-art pipe boasts remarkable advantages over traditional gas drainage steel pipes, including lightweight construction, exceptional ring stiffness, and superior corrosion resistance. These attributes not only enhance performance but also significantly reduce the total construction costs for mining operations. Over the years, our product has garnered widespread acclaim and trust from our customers, becoming a staple in their operations. Through meticulous structural design, we've enhanced the pipe's negative pressure resistance and optimized the wall thickness using unique biting structural reinforcement.
To cater to varying customer requirements, our reinforced spiral welded steel pipe features a tri-layer anti-corrosion structure: fused epoxy powder coating, hot dip zinc, and stainless steel. This versatile product can be manufactured with a maximum diameter of DN1000mm and a wall thickness ranging from 1.5mm to 3.5mm, depending on the specific model. These options ensure that our solution can meet the diverse needs of our clients while delivering unparalleled durability and performance.
The spiral welded steel pipe primarily utilizes a flange connection method. Specifically designed with flange sockets, the product can be securely joined at both ends by adding bolts, ensuring a robust and reliable connection.
Light Weight
Compared to traditional steel pipes of the same specification, this pipeline offers a remarkable reduction in weight by 50% - 150%. Its lightweight nature significantly cuts down on labor intensity during construction.
Corrosion Preventive
Choose from fused epoxy powder coating, hot-dip zinc, or stainless steel options to ensure unparalleled corrosion resistance and extend the service life of the pipe.
Negative Pressure Resistance
Engineered to meet stringent negative pressure performance requirements for gas drainage, this pipe withstands up to -0.097MPa pressure for 100 hours without any suction or deformation.
Low Operating Noise
Thanks to its flat inner wall structure, this pipe operates with notably low noise levels, providing a smooth and quiet performance during normal operations.
Strong Adhesion
Utilizing corrosion-resistant materials compliant with national standards, the pipe's coating adheres strongly, eliminating issues of peeling or detachment during use.
Crafted from cold-rolled or stainless steel strips, these pipes undergo multiple forming processes, including spiral nibble molding and automatic welding. The smooth inner wall and reinforced outer wall, built with a four-layer nibbling structure, enhance both weld strength and impact resistance, thanks to 45° angle welds.
Named 'occlusal steel pipe' due to its unique occlusal structure, this product features a reinforcing bar-type outer wall, also known as reinforcing bar spiral welded corrugated steel pipe.
Production Technology
| Uniform Plastic Coating |
Comprehensive Automative Line |
High Quality Steel Roll |
| Biggest 3600 Production Line |
CNAS Labratory |
One-code track |
About Us
Shandong Donghong Pipe Industry Co., Ltd. (referred to as: Donghong Co., Ltd., stock code: 603856) is headquartered in Qufu, China, the renowned hometown of Confucius. We stand as a premier engineering pipeline manufacturer, service provider, and general contractor, specializing in four distinctive categories of functional and customized pipelines: rainwater and sewage diversion pipelines, municipal area pipelines, industrial and mining area pipelines, and pipelines for national key engineering projects. Emphasizing an extensive industrial ecosystem, we collaborate with design institutes, financial institutions, port logistics, construction units, and both upstream and downstream enterprises. Our ambition is to emerge as a global leader in comprehensive pipeline system solutions, striving to revolutionize intelligent pipelines to enhance human life and ensure the relentless safety of pipeline transportation.
Donghong boasts a formidable team of over 200 R&D personnel and holds more than 100 patents. Leveraging national technology R&D platforms such as the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation, Donghong is at the forefront of pioneering digitalization, informatization, and intelligent advancements in pipeline engineering. Our contributions are integral to national key strategic projects and essential people's livelihood projects, including South-to-North Water Diversion, Huangzhilin, Hanzhiwei, Beijing-New Zealand Expressway, One Belt, One Road initiatives, standardized farmland, urban-rural water supply integration, Liren gas, and centralized heat supply. Donghong is dedicated to driving the pipeline engineering industry forward while serving both national and global communities.
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