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The reinforced spiral welded steel pipe is a pioneering innovation exclusively developed by Shandong Donghong Pipe Industry Co., Ltd. for underground gas drainage in coal mines. This exceptional pipe outperforms traditional gas drainage steel pipes through its remarkable features: light weight, high ring stiffness, and superior corrosion resistance. These benefits collectively contribute to significant reductions in the overall construction costs of mining steel pipes. Over the years, this product has not only been widely promoted and applied but has also earned the trust and preference of numerous customers. The advanced structural design enhances the pipe's negative pressure resistance and utilises a unique biting structural reinforcement to reduce the steel pipe's wall thickness, thereby offering unparalleled efficiency and durability.
Our reinforced spiral welded steel pipes come with diverse anti-corrosion structures tailored to meet various customer requirements. These structures include fused epoxy powder coating, hot dip zinc, and stainless steel. Moreover, our production capabilities are impressive, with the capacity to manufacture pipes up to DN1000mm in diameter and wall thicknesses ranging from 1.5mm to 3.5mm, depending on the specific product models. This versatility ensures that we can cater to a wide array of applications and customer needs with precision and reliability.
The spiral welded steel pipe connection method primarily employs flange connections. These products are typically designed with a flange socket, ensuring a secure bond when bolts are added to firmly connect both ends.
Light Weight
In comparison to steel pipes of similar specifications, this pipe's weight is reduced by 50% -150%. Its lightweight nature significantly lowers construction labor intensity.
Corrosion Preventive
The use of fused epoxy powder coating, hot dip zinc, and stainless steel offers a diversified selection, ensuring the pipe's extended service life.
Negative Pressure Resistance
Designed to meet the negative pressure performance requirements for gas drainage, the pipe withstands pressure up to -0.097MPa for 100 hours without suction or deformation.
Low Operating Noise
Featuring a flat inner wall structure, the pipe's smooth interior ensures minimal noise during normal operation.
Strong Adhesion
With anti-corrosion materials adhering to national standards, the pipe's coating remains intact during use, preventing any peeling or detachment.
Constructed from cold rolled steel strip or stainless steel strip, the products undergo multiple roll formations, spiral nibble molding, and automated welding processes within the spiral molding unit. Post-molding, the inner wall remains smooth, while the outer wall features a reinforced, four-layer nibbling structure that enhances weld strength. The 45° angle welded nibbling structure ensures superior impact resistance and pressure strength.
Known as occlusal steel pipe due to its occlusal structure, this product features an outer wall with a reinforcing bar type, also referred to 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 esteemed hometown of Confucius. As a distinguished engineering pipeline manufacturer, pipeline engineering service provider, and pipeline engineering general contractor, we specialize in four primary categories of functional and customized pipelines: special pipelines for rainwater and sewage diversion, municipal areas, industrial and mining areas, and national key engineering projects. Donghong Co., Ltd. has established a comprehensive industrial ecosystem that includes partnerships with design institutes, financial institutions, port logistics, construction units, and upstream and downstream enterprises. Our unwavering commitment is to emerge as a global leader in providing comprehensive pipeline system solutions, leveraging intelligent pipelines to transform human life and ensure the constant safety of pipeline transportation.
Donghong boasts a robust team of over 200 R&D personnel and holds more than 100 patents. We leverage cutting-edge national technology R&D platforms such as the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Post-doctoral Workstation. At Donghong, we delve deeply into the research of digitalization, informatization, and intelligentization of pipeline engineering, steering the advancement of the engineering pipeline industry. Our expertise serves national key strategic projects and crucial people's livelihood projects, including the South-to-North Water Diversion, Huangzhilin, Hanzhiwei, Beijing-New Zealand Expressway, One Belt, One Road initiatives, standardized farmland, urban and rural water supply integration, Liren gas, centralized heat supply, and more. Our dedication to excellence ensures that Donghong remains at the forefront of the industry, delivering innovative solutions for critical infrastructure projects.
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