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Our Reinforced Spiral Welded Steel Pipe is an innovative solution, meticulously engineered for underground gas drainage in coal mines. This exceptional pipe, a pioneering development by Shandong Donghong Pipe Industry Co., Ltd., surpasses traditional gas drainage steel pipes in several aspects. Not only is it lightweight, but it also boasts remarkable ring stiffness and outstanding corrosion resistance. These features collectively contribute to a significant reduction in the overall construction costs associated with mining steel pipes. Over the years, this product has earned the trust and preference of our customers, becoming a staple in various applications. Through ingenious structural design, we have enhanced the pipe's negative pressure resistance while simultaneously reducing the wall thickness thanks to our unique biting structural reinforcement.
Our Reinforced Spiral Welded Steel Pipe features a versatile anti-corrosion structure, tailored to meet diverse customer requirements. It is available in three superior variants: fused epoxy powder coating, hot dip zinc coating, and stainless steel. With a robust production capacity, we can manufacture pipes with diameters up to DN1000mm and wall thicknesses ranging from 1.5mm to 3.5mm, depending on the specific model. This adaptability ensures that we can cater to a wide array of project needs, delivering high-quality, durable, and efficient solutions.
The spiral welded steel pipe primarily utilizes a flange connection method. Designed with a flange socket, this product ensures robust connectivity by adding bolts, which firmly secure both ends.
Light Weight
Compared to steel pipes of the same specification, this pipe weighs 50% -150% less. Its lightweight nature significantly reduces construction labor intensity.
Corrosion prevention
The pipe's longevity is assured through a selection of corrosion-preventive measures, including fused epoxy powder coating, hot dip zinc, and stainless steel.
Negative pressure resistance
Engineered to meet gas drainage negative pressure requirements, this pipe withstands -0.097MPa pressure for 100 hours without suction or deformation.
Low operating noise
Featuring a smooth inner wall structure, the pipe operates quietly under normal conditions, thanks to its low-noise design.
Strong adhesion
Utilizing nationally standardized anti-corrosion materials, this pipe's coating remains firmly intact, with no peeling or falling off during use.
Our products are crafted from cold rolled steel strips or stainless steel strips. They undergo multiple processes, including spiral nibble molding and automatic welding, within a spiral molding unit. Post-molding, the inner wall of the pipe is smooth while the outer wall is reinforced. This four-layer nibbling structure enhances the weld strength, with the 45° angle weld ensuring high impact resistance and pressure durability.
Termed as occlusal steel pipe due to its unique structure, the product features an outer wall reinforced with rebar, 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), headquartered in Qufu, China-the illustrious hometown of Confucius-stands as a distinguished leader in engineering pipeline manufacturing. Donghong Co., Ltd. excels as a pipeline engineering service provider and general contractor, specializing in four primary categories of functional and customized pipelines: rainwater and sewage diversion, municipal area pipelines, industrial and mining area pipelines, and pipelines for national key engineering projects. Our integrated industrial ecosystem features collaborations with design institutes, financial institutions, port logistics, construction units, and both upstream and downstream enterprises. We are steadfastly committed to revolutionizing global pipeline systems, enhancing human life through intelligent pipelines, and ensuring the unwavering safety of pipeline transportation.
Donghong boasts over 200 R&D personnel and holds more than 100 patents. Leveraging national enterprise technology centers, the National CNAS Laboratory, academician expert workstations, and post-doctoral workstations, we deepen our research into the digitalization, informatization, and intelligentization of pipeline engineering. As pioneers in the engineering pipeline industry, we support national key strategic projects and vital public welfare initiatives, such as the South-to-North Water Diversion, Huangzhilin, Hanzhiwei, the Beijing-New Zealand Expressway, the Belt and Road Initiative, standardized farmland, urban and rural water supply integration, Liren gas, and centralized heat supply projects. Our unwavering dedication to these projects underscores our commitment to advancing both national infrastructure and essential public services.
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