The Steel Wire Mesh Skeleton Polyethylene Composite Pipe (SRTP/SRCP) is an innovative mining solution. Reinforced by high-strength steel wire mesh helically twisted and molded on both sides, and crafted with modified flame-retardant and antistatic high-density polyethylene (HDPE). This cutting-edge product employs high-performance adhesive resin to seamlessly bond the steel wire skeleton with the inner and outer HDPE layers. Merging the durability of steel with the flexibility of plastic, it finds extensive applications in underground water supply and drainage, slurry spraying, gas extraction, and air pressure management.
Polyethylene Raw Materials: The inner and outer polyethylene resin used in coal mining applications features special modified materials (such as carbon nanotube CNT modified materials and permanent coloring special materials) developed by the company with independent intellectual property rights. These enhancements ensure the pipes comply with MT181 and MT558.1 standards while significantly improving the mechanical properties of the materials.
Enhanced Steel Wire: Utilizing copper-plated steel wire that meets GB/T14450 standards, boasting a strength of 2050MPA, far surpassing the standard requirement of 1850MPA.
Adhesive Resin: Our patented adhesive resin, developed with the company's independent intellectual property rights, offers exceptional adhesion to steel wire and remarkable process adaptability.
OD
dn/mm |
PN MPa |
| 0.8 |
1.0 |
1.25 |
1.6 |
2.0 |
2.5 |
3.5 |
| Nominal Wall Thickness / mm |
| 50 |
|
|
|
4.5 |
5.0 |
5.5 |
5.5 |
| 63 |
4.5 |
5.0 |
5.5 |
5.5 |
| 75 |
5.0 |
5.0 |
5.5 |
6.0 |
| 90 |
5.5 |
5.5 |
5.5 |
6.0 |
| 110 |
5.5 |
5.5 |
7.0 |
7.0 |
7.5 |
8.5 |
| 140 |
5.5 |
5.5 |
8.0 |
8.5 |
9.0 |
9.5 |
| 160 |
6.0 |
6.0 |
9.0 |
9.5 |
10.0 |
10.5 |
| 200 |
6.0 |
6.0 |
9.5 |
10.5 |
11.0 |
12.5 |
| 225 |
8.0 |
8.0 |
10.0 |
10.5 |
11.0 |
|
| 250 |
8.0 |
10.5 |
10.5 |
12.0 |
12.0 |
12.5 |
| 315 |
9.5 |
11.5 |
11.5 |
13.0 |
13.0 |
|
| 355 |
10.0 |
12.0 |
12.0 |
14.0 |
|
| 400 |
10.5 |
12.5 |
12.5 |
15.0 |
| 450 |
11.5 |
13.5 |
13.5 |
16.0 |
| 500 |
12.5 |
15.5 |
15.5 |
18.0 |
| 560 |
17.0 |
20.0 |
|
|
| 630 |
20.0 |
23.0 |
1. Shandong Donghong Pipe Industry Co., Ltd. proudly stands as the pioneering enterprise to develop medium and high-pressure steel wire mesh skeleton polyethylene composite pipe products. We excel in creating revolutionary connection methods for enhanced efficiency.
2. As trailblazers in the industry, we are the first to innovate steel wire mesh skeleton polyethylene composite pipes specifically designed for the rigorous demands of underground coal mines.
3. Leading the way, we successfully introduced the wire mesh skeleton polyethylene composite pipe to underground coal mines, setting a new standard in the industry and firmly establishing ourselves as innovators.
4. We are the first enterprise to develop wire mesh skeleton polyethylene composite pipe products that can withstand pressures above 3.5MPa, showcasing our commitment to high-performance solutions.
5. Our groundbreaking 'double sealing' and 'one-piece clamp' connection technologies for steel wire mesh skeleton polyethylene composite pipes used in underground coal mines are industry firsts, reflecting our dedication to safety and reliability.
Donghong has established a state-of-the-art high-pressure pipe fittings factory, dedicated to producing a diverse range of high-quality, high-pressure engineering fittings. We go beyond standard offerings by providing custom solutions tailored to meet your specific requirements and unique industrial and mining conditions. Our philosophy, 'a strong connection for a superior system,' drives our commitment to excellence in every product we create.
About
us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) (abbreviation: Donghong, stock code: 603856) is prominently headquartered in the historic and culturally rich city of Qufu, China, the hometown of Confucius. Established in 1997, Donghong stands as a reputable manufacturer specializing in engineering pipelines, a comprehensive service provider for pipeline engineering, and a general contractor for pipeline projects. Our product portfolio encompasses four major categories of functional and customized pipelines: rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and pipelines for national key projects. On November 6, 2017, Donghong achieved a significant milestone by becoming the first main board listed engineering composite pipeline manufacturer in China, as we were listed on the main board of Shanghai.
Donghong boasts a robust team of over 200 dedicated R&D personnel and holds more than 100 innovative patents. With strong support from national technology platforms such as the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Postdoctoral Workstation, Donghong leads groundbreaking research in the digitalization, informatization, and intelligence of pipeline engineering. Our commitment to technological advancement continually propels the engineering pipeline industry forward.
Donghong has played a pivotal role in numerous national key strategic and livelihood projects. By spearheading the development of the engineering pipeline industry, we proudly contribute to significant national undertakings such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, the One Belt, One Road initiative, standardized farmland projects, the integration of urban and rural water supply, Liren gas distribution, centralized heating systems, and beyond.
Experimental Verification Process
Premium Key Raw Materials
The binder resin is crucial to this product, enabling seamless stress transfer during the pipe pressure process. As a key component of the composite material, the binder resin's performance significantly dictates the product's overall quality. Leveraging our specialized raw material design and development platform, we enhance the binder resin's properties, ensuring precise compatibility with our processes and equipment.
Plating serves a dual purpose: corrosion protection and enhanced shear strength between steel wire and bonding resin. Testing and comparison show that tin bronze offers a superior average shear strength of 20.69MPa, compared to brass at 11.42MPa. This significant variance in shear strength led us to select tin bronze-plated steel wire as our pressure-bearing substrate.
Prominent Industrial and Mining Application Cases
Xinjiang Key Project Construction - Process Pipeline for Potassium Salt in Lop Nur, Xinjiang
This project, a national key investment in the salt chemical sector, focuses on the Lop Nur process pipeline in Xinjiang. The pipeline boasts an impressive annual conveying capacity, superior pipe bending resistance, and exceptional interface stability requirements. Donghong's technical team meticulously designed and developed a custom product structure and interface solution tailored specifically to the project's unique conditions. Meanwhile, Donghong Pipeline Engineering Company managed the entire construction process, ensuring effective pipeline operation.
Wet Copper Refining Project in Kazakhstan
This project requires the open-air transportation of highly corrosive copper sulfate media. Donghong's high-pressure corrosion-resistant SRTP and composite500 steel-plastic composite technology, combined with the innovative seal-seal double-seal connection technology, offer a comprehensive solution for the corrosion-resistant transportation of special media.
"One Belt, One Road" Initiative - Indonesia OBI Nickel and Cobalt Project Deep Sea Landfill Project
Situated on Obi Island in North Maluku Province, Indonesia, this deep-sea landfill (DSTP) system was designed by the U.S. Borealis (Beijing) Pipeline Technology Co., Ltd. After a thorough economic investment comparison and operation and maintenance safety assessment, the project selected the DN1000 * 1.6MPa steel wire mesh skeleton polyethylene composite pipe. This choice highlights Donghong's expertise, with the project valued at 66.484 million yuan.
We have fostered long-term collaborations with numerous logistics companies, crafting an unparalleled multimodal transportation system. Leveraging a blend of 'steam transportation + railroad transportation + port and shipping logistics,' we are committed to providing our customers with the most efficient and effective shipping solutions.
With extensive years of expertise in transportation, we excel in overcoming any climatic and environmental challenges. Be it extreme heat, freezing cold, or the most remote and demanding locations, our meticulously designed transportation plans guarantee that every shipment reaches its destination promptly and safely.
1. Does your product meet international standards?
Our products have passed CE, BV, ISO, and WARS certifications, and all metrics indicate performance above standard requirements. Feel free to inform us of any specific national standard you require; we will check or test it accordingly.
2. What types of services do you offer?
As a manufacturing factory, we provide high-quality pipe products, pipe fittings, packaging, and shipping services. As a professional consulting company, we offer project consulting advice, comprehensive pipe system solutions, and design suggestions. As an engineering-focused enterprise, we also offer pipeline contractor services, pipe repair services, and free maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we offer customization in materials, specifications, logos, packaging, connection methods, and more. Our professional team can provide solution suggestions for your specific projects, and we have successful cases showcasing this service.
4. What are your terms of payment?
We accept T/T or L/C at sight.
5. How can you guarantee the quality of the goods you offer?
We warmly welcome all customers to visit our company and inspect our products firsthand. We can also conduct stringent tests as per customer requirements before the order. Additionally, before bulk production, we can dispatch samples to customers for their own testing to ensure product qualification.
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