Steel Wire Mesh Skeleton Polyethylene Composite Pipe (SRTP/SRCP): Experience the pinnacle of modern mining technology with our revolutionary SRTP/SRCP pipes. Reinforced by high-strength steel wire mesh intricately helically twisted and molded on both sides, and enhanced with modified flame-retardant and antistatic high-density polyethylene (HDPE), this product offers unparalleled durability and performance. The high-performance adhesive resin seamlessly bonds the steel wire skeleton to the inner and outer layers of HDPE, amalgamating the robustness of steel with the versatility of plastic. Ideal for underground water supply and drainage, slurry spraying, gas extraction, and air pressure applications, our composite pipes are engineered to meet the rigorous demands of the mining industry.
Polyethylene Raw Materials: In the realm of coal mining, the inner and outer polyethylene resin layers are crafted from flame-retardant and antistatic specially modified materials, including carbon nanotube (CNT) modified substances, and permanently colored special materials. Developed using our unique intellectual property rights, these materials not only comply with MT181 and MT558.1 standards but also significantly enhance the mechanical properties of our pipes, ensuring they stand up to the most challenging conditions.
Enhanced Steel Wire: Our pipes utilize copper-plated steel wire conforming to GB/T14450 requirements, boasting an extraordinary strength of 2050 MPa, far surpassing the standard 1850 MPa requirements. This ensures superior durability and reliability in the most demanding environments, guaranteeing long-lasting performance.
Adhesive Resin: Our patented adhesive resin, developed with proprietary technology, offers exceptional adhesion to steel wire and outstanding process adaptability. This groundbreaking innovation ensures a robust bond and significantly enhances the overall structural integrity of our composite pipes, making them a reliable choice for rigorous industrial applications.
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. The pioneering enterprise to develop medium and high-pressure steel wire mesh skeleton polyethylene composite pipe products, complete with an innovative connection method.
2. The trailblazing enterprise to introduce the steel wire mesh skeleton polyethylene composite pipe specifically designed for underground coal mines.
3. The first enterprise to champion the use of wire mesh skeleton polyethylene composite pipes in the coal mining sector, establishing a new industry standard.
4. The first enterprise to innovate wire mesh skeleton polyethylene composite pipe products capable of withstanding pressures above 3.5MPa.
5. The pioneering enterprise to develop the 'double sealing' and 'one-piece clamp' connection technology tailored for steel wire mesh skeleton polyethylene composite pipes in underground coal mines.
The flanged connection with port sealing end faces is integral to the pipe, meticulously designed to address the demands of high-pressure piping applications.
Connection Features:
1) Enhanced automation and high continuous production efficiency;
2) Streamlined process flow, easy process control, and dependable quality;
3) Integrated sealing end face and tube body structure, eliminating secondary injection molding, and ensuring superior pressure-bearing capacity;
4) Extended fixed end face with a riveting structure to mitigate system risks.
Processing Capacity:
Accommodates dn50-dn315mm models, with a pressure level connection capacity ranging from 0.8MPa to 10.0MPa; dn355 and above models enhance the original double-seal structure.
Universal Black Standard Flange
Our engineered fitting solution provides improved hydraulic performance while using conventional PE jointing methods to maintain the pipe route,even in complex construction environments. They are fabricated in-house from our own manufactured pipe range.
These fittings are constructed in a controlled environment at our ISO 9001:2015 and OHSAS 18001:2015 certified.
The high-pressure clamp connection utilizes specialized pipe end molding equipment to form a 'pier edge' at the end of the steel wire pipe, creating a flange root-like structure. This structure enables the connection between the pipe bodies through a cast steel clamp.
Connection Characteristics:
1) The joint is derived directly from the tube body, ensuring high structural strength;
2) Mechanical connection is quick, easy, and does not require special equipment.
Processing Capacity:
3) Simple and efficient connection process with low technical requirements for personnel.
Processing Capacity:
Supports dn90-dn315mm models with a pressure level ranging from 1.6MPa to 3.5MPa.
Shandong Donghong Pipe Industry Co., Ltd. has established a cutting-edge high-pressure pipe fittings factory, dedicated to manufacturing a wide array of high-pressure engineering fittings. Additionally, we offer bespoke customization services to meet unique customer specifications and diverse industrial and mining conditions. Our manufacturing philosophy is centered on ensuring 'Good Connection for an Excellent System,' guaranteeing superior performance and reliability.
About
us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) (abbreviation: Donghong, stock code: 603856) proudly calls Qufu, the hometown of Confucius in China, its home. Established in 1997, Donghong stands as a premier manufacturer and service provider in the engineering pipeline sector. Our core business 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. As a testament to our 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 lies at our core. With a robust team of over 200 R&D personnel and an impressive portfolio of more than 100 patents, we harness the capabilities of national enterprise technology centers, CNAS laboratories, academician expert workstations, and postdoctoral workstations. This allows us to drive significant advancements in digitalization, informatization, and intelligence within the pipeline engineering realm. Our unwavering commitment to technological excellence firmly establishes us as trailblazers in the industry.
Dedicated to national strategic and livelihood projects, Donghong plays a pivotal role in major initiatives such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, and the One Belt, One Road initiative. Our expertise also extends to standardized farmland, urban and rural water supply integration, Liren gas projects, and centralized heating systems. This reinforces our leadership in engineering pipeline solutions, paving the way for a brighter, more sustainable future.
Experimental Verification
Key Raw Materials
The binder resin is the cornerstone of our Composite HDPE Pipe with Steel Mesh. It guarantees the flawless transfer of stress during the pipe pressure process and stands as a vital composite material. The excellence of our product is deeply rooted in the outstanding performance of the binder resin. At Shandong Donghong Pipe Industry Co., Ltd., we take pride in our advanced raw material design and development platform, meticulously crafted to elevate the binder resin's capabilities. This ensures impeccable compatibility with our processes and equipment, yielding a product that exemplifies superior quality.
Plating is essential for dual functions: providing robust corrosion protection and enhancing the shear strength between the steel wire and bonding resin. Through extensive data testing and meticulous comparisons, it was found that tin bronze achieves an impressive average shear strength of 20.69MPa, whereas brass registers at 11.42MPa. These differences in shear strength across various plating and bonding resins led us to select tin bronze-plated steel wire as our pressure-bearing substrate. This choice guarantees exceptional performance and reliability, making our pipes a benchmark in the industry.
Key Industrial and Mining Application Highlights
Xinjiang Key Project Construction: Process Pipeline for Potassium Salt in Lop Nur, Xinjiang
This pivotal national investment focuses on a salt chemical project in Xinjiang Lop Nur, featuring a highly demanding process pipeline. The annual conveying capacity, pipe bending resistance, and interface stability requirements are exceptionally rigorous. The expert technical team at Donghong meticulously designed and developed non-standard tailored product structures and interface solutions to meet these specific project conditions. Furthermore, Donghong Pipeline Engineering Company oversaw the entire construction process, ensuring optimal pipeline performance and operational efficiency.
Wet Copper Refining Project in Kazakhstan
This project required open-air transportation of highly corrosive copper sulfate media. Donghong's high-pressure corrosion-resistant SRTP, advanced composite500 steel-plastic technology, and innovative seal-seal double-seal connection technology provided an impeccable solution for the corrosion-resistant transport of these specialized media.
"One Belt, One Road"-Indonesia OBI Nickel and Cobalt Project Deep Sea Landfill Initiative
Situated on Obi Island in North Maluku Province, Indonesia, this project was designed by U.S. Borealis (Beijing) Pipeline Technology Co., Ltd. The deep-sea landfill (DSTP) system was chosen after a comprehensive analysis of economic investment, operational, and maintenance safety. The dn1000 * 1.6MPa steel wire mesh skeleton polyethylene composite pipe was ultimately selected, showcasing Donghong's innovation and expertise. The value of this project amounts to 66.484 million yuan.
Donghong has established strategic partnerships with more than five elite 5A-level logistics companies. With many years of unparalleled transportation experience, our services span across automobile, railway, port, and shipping logistics. Whether facing extreme heat or harsh cold, or delivering to the most remote or challenging locations, we promise exceptional service. Our robust and comprehensive transportation strategy guarantees the prompt delivery of every shipment directly to your site.
1. Is your product meets the international standard ?
Our products have passed CE, BV, ISO, and WRAS certifications. All metrics indicate performance that exceeds standard requirements. Please let us know the specific national standard you require, and we will gladly verify or test it for you.
2. What kind of service do you offer ?
As a manufacturing factory, we provide a comprehensive range of pipe products, pipe fittings, packaging, and shipping services. As a professional consulting company, we offer project consulting, pipe system solutions, and design suggestions. Moreover, as an engineering-focused enterprise, we provide pipeline contracting services, pipe repair services, and free maintenance guidance.
3. Do you support OEM/ODM service?
Yes, we offer extensive customization options including material, specifications, logo, packaging, and connection methods. Our professional team also provides tailored solution suggestions for your specific projects, with numerous successful cases to our credit.
4. What's your terms of payment?
We accept T/T or L/C at sight.
5. How can you guarantee the goods you offered is qualified?
We warmly welcome all customers to visit our company and inspect our goods in person. Additionally, we can conduct stringent tests as per customer requirements before the order. We also provide samples prior to bulk production for customers to perform their own quality tests.
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