Steel Wire Mesh Skeleton Polyethylene Composite Pipe (SRTP/SRCP): Discover the elite of modern mining solutions with our groundbreaking SRTP/SRCP pipes. Fortified by a high-strength steel wire mesh intricately helically twisted and expertly molded on both sides, enhanced with advanced flame-retardant and antistatic high-density polyethylene (HDPE), this product delivers exceptional durability and performance. The high-performance adhesive resin flawlessly bonds the steel wire skeleton to the inner and outer layers of HDPE, merging the ruggedness of steel with the adaptability of plastic. Perfectly suited for underground water supply, drainage, slurry spraying, gas extraction, and air pressure applications, our composite pipes are engineered to meet the stringent demands of the mining industry.
Polyethylene Raw Materials: In the sphere of coal mining, the inner and outer polyethylene resin layers are crafted from specially modified flame-retardant and antistatic materials, including carbon nanotube (CNT) modified substances and permanently colored special materials. These materials are developed using our company's exclusive intellectual property rights. Not only do they comply with MT181 and MT558.1 standards, but they also significantly enhance the mechanical properties of our pipes.
Enhanced Steel Wire: Our pipes leverage copper-plated steel wire meeting GB/T14450 requirements, offering a formidable strength of 2050 MPa, far exceeding the standard 1850 MPa requirements. This guarantees unparalleled durability and reliability in the most challenging environments.
Adhesive Resin: Our patented adhesive resin, crafted with the company's proprietary technology, provides exceptional adhesion to steel wire and unparalleled process adaptability. This innovation ensures a robust bond and enhances the overall structural integrity of our composite pipes.
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. Recognized as the pioneering enterprise to develop medium and high-pressure steel wire mesh skeleton polyethylene composite pipe products, featuring a revolutionary connection method.
2. Known for trailblazing the introduction of steel wire mesh skeleton polyethylene composite pipes specifically engineered for underground coal mines.
3. The first enterprise to champion the use of wire mesh skeleton polyethylene composite pipes within the coal mining industry, setting a new benchmark.
4. The groundbreaking enterprise to innovate wire mesh skeleton polyethylene composite pipe products that withstand pressures exceeding 3.5MPa.
5. The pioneering enterprise to develop the advanced 'double sealing' and 'one-piece clamp' connection technology, customized for steel wire mesh skeleton polyethylene composite pipes in underground coal mines.
The flanged connection with port sealing end faces integral to the pipe is meticulously designed to meet the rigorous demands of high-pressure piping applications.
Connection Features:
1) Enhanced automation and exceptional continuous production efficiency;
2) Streamlined process flow, straightforward process control, and dependable quality;
3) Integrated sealing end face and tube body structure, eliminating secondary injection molding, providing outstanding pressure-bearing capacity;
4) Lengthened riveting structure fixed end face, minimizing system risks.
Processing Capacity:
Accommodates dn50-dn315mm models with a pressure range of 0.8MPa-10.0MPa; dn355 and above models incorporate an advanced double seal structure.
The high-pressure clamp connection utilizes specialized pipe end molding equipment. The end of the steel wire pipe forms a near flange-like root structure through 'pier edge,' secured by cast steel clamps to ensure robust connections between pipe bodies.
Connection Characteristics:
1) Joint seamlessly integrated with the tube body, ensuring high structural strength;
2) Quick and easy mechanical connection, eliminating the need for specialized equipment.
Processing Capacity:
3) Simple and efficient connection process, requiring minimal technical expertise.
Processing Capacity:
Supports dn90-dn315mm models with a pressure range of 1.6MPa-3.5MPa.
Shandong Donghong Pipe Industry Co., Ltd. operates a cutting-edge high-pressure pipe fittings factory, specializing in a diverse range of high-pressure engineering fittings. We also provide customized solutions tailored to unique customer requirements and varied industrial and mining conditions. Our commitment to 'Good Connection for an Excellent System' ensures unparalleled performance and reliability.
About
us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) (abbreviation: Donghong, stock code: 603856) proudly calls Qufu, the historical hometown of Confucius in China, its esteemed home. Since our inception in 1997, Donghong has emerged as a premier manufacturer and service provider in the engineering pipeline sector. Our core business portfolio spans 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. As a testament to our unwavering industry leadership, Donghong was listed on the main board of Shanghai on November 6, 2017, making history as China's first main board listed engineering composite pipeline manufacturer.
At Donghong, innovation is our driving force. Our team of over 200 R&D personnel and a robust portfolio of more than 100 patents underscore our commitment to technological excellence. We harness the power of national enterprise technology centers, CNAS laboratories, academician expert workstations, and postdoctoral workstations to propel advancements in digitalization, informatization, and intelligence within the pipeline engineering realm. Our relentless pursuit of innovation positions us as trailblazers, continually pushing the boundaries of what's possible in our industry.
Dedicated to national strategic and livelihood projects, Donghong plays an instrumental role in key initiatives such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, and the One Belt, One Road initiative. Our expertise seamlessly extends to standardized farmland, urban and rural water supply integration, Liren gas projects, and centralized heating systems. This commitment fortifies our leadership in engineering pipeline solutions, as we strive to create a brighter, more sustainable future for all.
Experimental Verification
Key Raw Materials
The binder resin is pivotal to our Composite HDPE Pipe with Steel Mesh. It ensures the seamless transfer of stress during the pipe pressure process and is a crucial composite material. The quality of our product is significantly influenced by the performance of the binder resin. At Shandong Donghong Pipe Industry Co., Ltd., we boast a specialized raw material design and development platform, precisely tailored to enhance the binder resin's capabilities, ensuring optimal compatibility with our processes and equipment.
Plating serves a dual purpose: it offers corrosion protection and boosts the shear strength between the steel wire and bonding resin. Through rigorous data testing and comparisons, it was discovered that the average shear strength of tin bronze reaches 20.69MPa, while brass is at 11.42MPa. Such variations in shear strength with different plating and bonding resins led us to opt for tin bronze-plated steel wire as our pressure-bearing substrate, ensuring superior performance and reliability.
Key Industrial and Mining Application Highlights
Xinjiang Key Project Construction: Process Pipeline for Potassium Salt in Lop Nur, Xinjiang
This pivotal national investment centers on a major salt chemical project in Xinjiang Lop Nur, demanding an extremely high standard for process pipelines. With extraordinary requirements for annual conveyance capacity, pipe bending resistance, and interface stability, Donghong's expert technical team meticulously designed and developed customized product structures and interface solutions to meet these stringent conditions. Moreover, Donghong Pipeline Engineering Company supervised the entire construction process, ensuring unmatched pipeline performance and operational efficiency.
Wet Copper Refining Project in Kazakhstan
This project involved the challenging task of open-air transportation of highly corrosive copper sulfate media. Donghong's high-pressure corrosion-resistant SRTP, coupled with the state-of-the-art composite500 steel-plastic technology and innovative seal-seal double-seal connection technology, provided the perfect solution for the corrosion-resistant transport of these specialized media.
"One Belt, One Road"-Indonesia OBI Nickel and Cobalt Project Deep Sea Landfill Initiative
Located on Obi Island in North Maluku Province, Indonesia, this project was ingeniously designed by U.S. Borealis (Beijing) Pipeline Technology Co., Ltd. Following a thorough analysis of economic investment, operational, and maintenance safety, the deep-sea landfill (DSTP) system was selected. Donghong's dn1000 * 1.6MPa steel wire mesh skeleton polyethylene composite pipe was ultimately chosen, highlighting Donghong's innovative prowess and industry expertise. The total project value stands at an impressive 66.484 million yuan.
Donghong has established strategic partnerships with over five 5A-level logistics companies, bringing years of seasoned transportation expertise to our operations. By seamlessly integrating automobile, railway, port, and shipping logistics, we ensure optimal delivery solutions regardless of weather conditions or geographical challenges. Our robust transportation strategy guarantees swift and secure delivery to even the most remote or demanding locations, ensuring that every shipment reaches its destination promptly and in perfect condition.
1. Does your product meet international standards?
Our products have successfully passed CE, BV, ISO, and WARS certifications, with all metrics exceeding standard requirements. Please let us know your specific national standards, and we will verify or test our products accordingly.
2. What kind of services do you offer?
As a manufacturing factory, we provide pipe products, pipe fittings, packaging, and shipping services. As a professional consulting company, we offer project advisory, pipe system solutions, and design recommendations. Additionally, as an engineering-focused enterprise, we provide pipeline contracting, pipe repair services, and free maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we offer customization in material, specifications, logos, packaging, connection methods, and more. Our professional team can also provide solution suggestions tailored to your specific projects, and we have numerous successful cases to demonstrate our expertise.
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 goods in person. We can also conduct strict tests as per customer requirements before the order. Before bulk production, we can dispatch samples for customers to perform their own tests and ensure the quality of our products.
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