The Steel Wire Mesh Skeleton Polyethylene Composite Pipe (SRTP/SRCP) represents the pinnacle of innovation in mining products. This advanced composite pipe is meticulously crafted with a high-strength steel wire mesh, expertly twisted and molded in both left and right helices. The mesh is enveloped in modified flame-retardant and antistatic high-density polyethylene (HDPE), which is seamlessly bonded with high-performance adhesive resin. This fusion integrates the superior attributes of both steel and plastic pipes, making it the ideal solution for a broad spectrum of applications. Widely utilized in underground water supply and drainage, slurry spraying, gas extraction, and air pressure systems, this composite pipe ensures robust performance and reliability in demanding environments.
Polyethylene Raw Materials: The inner and outer polyethylene resins used in our coal mine applications are composed of flame-retardant and antistatic specially modified materials. These include carbon nanotube (CNT) modified materials and permanently colored special materials, developed using our proprietary technologies. Not only do these pipes meet the stringent MT181 and MT558.1 standards, but they also exhibit enhanced mechanical properties, setting new benchmarks in the industry.
Enhanced Steel Wire: We utilize copper-plated steel wire that complies with GB/T14450 standards and boasts a tensile strength of 2050 MPa, significantly surpassing the standard requirement of 1850 MPa. This ensures exceptional durability and performance.
Adhesive Resin: Our patented adhesive resin, developed with our proprietary technologies, delivers unmatched adhesion strength to steel wire while offering excellent process adaptability. This innovation guarantees a secure and enduring bond, ensuring the long-term reliability of our composite pipes.
| Nominal diamter /mm |
Nominal Pressure / Mpa |
| 0.8 |
1.0 |
1.25 |
1.6 |
2.0 |
2.5 |
3.0 |
3.5 |
4.0 |
5.0 |
6.3 |
7.0 |
8.0 |
9.0 |
10.0 |
11.0 |
12.0 |
13.0 |
14.0 |
15.0 |
| Nominal Wall Thickness / mm |
| 50 |
/ |
/ |
/ |
4.5 |
5.0 |
5.5 |
5.5 |
5.5 |
6.0 |
8.5 |
9.0 |
9.5 |
10.0 |
10.0 |
10.0 |
10.0 |
10.0 |
10.0 |
10.5 |
10.5 |
| 63 |
/ |
/ |
/ |
4.5 |
5.0 |
5.5 |
5.5 |
5.5 |
6.5 |
8.5 |
9.0 |
10.0 |
10.0 |
10.0 |
10.0 |
10.5 |
10.5 |
11.5 |
11.0 |
11.0 |
| 75 |
/ |
/ |
/ |
5.0 |
5.0 |
5.5. |
6.0 |
6.0 |
9.5 |
9.5 |
9.5 |
10.5 |
10.5 |
10.5 |
11.5 |
11.5 |
12.0 |
12.0 |
12.0 |
12.0 |
| 90 |
/ |
/ |
/ |
5.5 |
5.5 |
5.5 |
6.0 |
6.0 |
10.0 |
10.5 |
10.5 |
11.5 |
11.5 |
11.5 |
12.0 |
12.0 |
12.0 |
12.0 |
12.5 |
13.0 |
| 110 |
/ |
5.5 |
5.5 |
7.0 |
7.0 |
7.5 |
8.5 |
8.5 |
11.0 |
12.0 |
12.0 |
12.0 |
12.0 |
13.0 |
13.0 |
13.5 |
13.5 |
14.5 |
14.5 |
15.5 |
| 125 |
/ |
5.5 |
5.5 |
7.5 |
8.0 |
8.5 |
9.5 |
9.5 |
11.0 |
11.0 |
12.0 |
12.0 |
13.0 |
13.0 |
15.0 |
15.0 |
15.0 |
15.0 |
15.5 |
15.5 |
| 140 |
/ |
5.5 |
5.5 |
8.0 |
8.5 |
9.0 |
9.5 |
9.5 |
11.0 |
11.0 |
13.0 |
13.0 |
15.0 |
15.0 |
15.0 |
15.0 |
15.0 |
15.0 |
16.0 |
16.5 |
| 160 |
/ |
6.0 |
6.0 |
9.0 |
9.5 |
10.0 |
10.5 |
10.5 |
11.0 |
12.0 |
14.0 |
14.0 |
15.0 |
15.0 |
15.0 |
15.5 |
16.0 |
16.0 |
17.0 |
17.0 |
| 180 |
/ |
6.0 |
6.0 |
9.5 |
10.5 |
1.0 |
12.0 |
12.5 |
13.0 |
13.0 |
14.0 |
15.0 |
15.0 |
15.0 |
15.0 |
15.5 |
16.0 |
17.0 |
/ |
/ |
| 200 |
/ |
6.0 |
6.0 |
9.5 |
10.5 |
11.0 |
12.0 |
12.5 |
13.0 |
13.0 |
15.0 |
15.0 |
15.0 |
15.0 |
16.0 |
17.0 |
17.0 |
/ |
/ |
/ |
| 225 |
/ |
8.0 |
8.0 |
10.0 |
10.5 |
11.0 |
12.0 |
13.0 |
13.0 |
13.0 |
14.0 |
15.0 |
16.0 |
17.0 |
17.0 |
/ |
/ |
/ |
/ |
/ |
| 250 |
8.0 |
10.5 |
10.5 |
12.0 |
12.0 |
12.5 |
14.0 |
14.0 |
14.0 |
15.0 |
16.0 |
17.0 |
17.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 280 |
9.5 |
11.0 |
11.0 |
13.0 |
13.0 |
15.0 |
15.0 |
17.0 |
17.0 |
18.0 |
18.0 |
19.0 |
20.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 315 |
9.5 |
11.5 |
11.5 |
13.0 |
13.0 |
15.0 |
15.0 |
18.0 |
18.0 |
19.0 |
20.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 355 |
10.0 |
12.0 |
12.0 |
14.0 |
14.0 |
17.0 |
17.0 |
19.0 |
19.0 |
20.0 |
21.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 400 |
10.5 |
12.5 |
12.5 |
15.0 |
16.0 |
17.0 |
17.0 |
19.0 |
21.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 450 |
11.5 |
13.5 |
13.5 |
16.0 |
18.0 |
18.0 |
19.0 |
20.0 |
21.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 500 |
12.5 |
15.5 |
15.5 |
18.0 |
19.0 |
22.0 |
23.0 |
24.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 560 |
17.0 |
20.0 |
20.0 |
22.0 |
22.0 |
24.0 |
26.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 630 |
20.2 |
23.0 |
23.0 |
26.0 |
26.0 |
28.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 710 |
23.0 |
26.0 |
28.0 |
30.0 |
32.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 800 |
27.0 |
30.0 |
32.0 |
34.0 |
36.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 900 |
29.0 |
33.5 |
35.0 |
38.0 |
40.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 1000 |
34.0 |
37.0 |
40.0 |
45.0 |
47.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| 1200 |
38.0 |
40.0 |
43.0 |
50.0 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
1. The pioneering enterprise to introduce medium and high-pressure steel wire mesh skeleton polyethylene composite pipe products, complete with an innovative connection method.
2. The trailblazer in developing steel wire mesh skeleton polyethylene composite pipes specifically designed for underground coal mines.
3. The first enterprise to successfully promote and implement wire mesh skeleton polyethylene composite pipes in the coal mining industry, setting new industry standards.
4. The leader in developing wire mesh skeleton polyethylene composite pipe products capable of withstanding pressures above 3.5MPa.
5. The front-runner in introducing 'double sealing' and 'one-piece clamp' connection technology for steel wire mesh skeleton polyethylene composite pipes used in underground coal mines.
Shandong Donghong Pipe Industry Co., Ltd. has established a state-of-the-art high-pressure pipe fittings factory. This advanced facility specializes in producing a diverse range of high-pressure engineering fittings. Moreover, we offer bespoke customization services tailored to meet specific customer requirements and various industrial and mining conditions. Our manufacturing philosophy centers on the principle of 'a good connection achieves a good system,' ensuring exceptional performance and reliability.
About
us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) - stock code: 603856 - is a titan in pipeline engineering, headquartered in the historically rich town of Qufu, China, the birthplace of Confucius. Since its inception in 1997, Donghong has emerged as a premier manufacturer, service provider, and general contractor specializing in engineering pipelines. Our expansive product range includes four key categories: rainwater and sewage drainage, municipal, industrial and mining pipelines, and pipelines for national key projects. On November 6, 2017, Donghong made a landmark achievement by becoming the first engineering composite pipeline manufacturer to be listed on the main board of Shanghai.
With over 200 dedicated R&D personnel and a portfolio of more than 100 patents, Donghong stands at the forefront of innovation. Supported by prestigious national platforms such as the National Enterprise Technology Center, National CNAS Laboratory, Academician Expert Workstation, and Postdoctoral Workstation, we are pioneers in the digitalization, informatization, and intelligence of pipeline engineering, continually setting industry benchmarks.
Our company plays a pivotal role in national key strategic and livelihood projects. From the South-to-North Water Diversion and Hanjinwei, to the Beijing-Xinjiang Expressway, One Belt, One Road initiative, standardized farmland, urban and rural water supply integration, Liren gas, and centralized heating projects, Donghong's contributions are integral to the nation's growth and prosperity.
The Experimental Verification
The Key Raw Materials
The binder resin is pivotal to our Composite HDPE Pipe for Medical Use. It ensures seamless stress transfer during pipe pressure processing and is integral to the pipe composite materials. The quality of the binder resin significantly impacts the overall product quality. At Shandong Donghong Pipe Industry Co., Ltd., we have a specialized raw material design and development platform. This platform enhances the binder resin, optimizes the processes, and ensures perfect equipment compatibility.
Plating not only provides excellent corrosion protection but also significantly enhances the shear strength between the steel wire and bonding resin. Data testing reveals that the average shear strength of tin-bronze plating is 20.69 MPa, while brass is 11.42 MPa. Given this substantial difference, we have chosen tin-bronze plated steel wire as the pressure-bearing substrate for its superior performance in our Composite HDPE Pipes.
Key Industrial and Mining Application Cases
Xinjiang Key Project Construction - The Process Pipeline for Potassium Salt in Lop Nur, Xinjiang
This project represents a national key investment in salt chemical projects within the Lop Nur region of Xinjiang. The pipeline's annual conveying capacity, bending resistance, and interface stability are held to extremely stringent standards. To meet these demands, the Donghong technical team has designed and developed a customized non-standard product structure and interface program tailored specifically to the project's unique conditions. Donghong Pipeline Engineering Company oversees the entire construction process, ensuring optimal pipeline operation.
Wet Copper Refining Project in Kazakhstan
This project necessitates open-air transport of highly corrosive copper sulfate media. Donghong employs high-pressure, corrosion-resistant SRTP and composite500 steel-plastic composite technology, alongside seal-seal double-seal connection technology. These innovations provide a flawless solution for the corrosion-resistant transport of such specialized media.
"One Belt, One Road" - Indonesia OBI Nickel and Cobalt Project Deep Sea Landfill Project
Situated on Obi Island in North Maluku Province, Indonesia, this project was undertaken by the U.S. Borealis (Beijing) Pipeline Technology Co., Ltd., which handled the deep-sea landfill (DSTP) system's design. After thorough economic investment comparisons and safety assessments for operation and maintenance, the DN1000 * 1.6MPa steel wire mesh skeleton polyethylene composite pipe was selected. This choice showcases Donghong Wisdom and contributes to a project valued at 66.484 million yuan.
We have established long-term partnerships with a variety of leading logistics companies, creating an innovative and seamless transportation model that integrates steam transportation, railroad networks, and port and shipping logistics. This multifaceted approach ensures that our customers receive the most efficient and cost-effective transportation solutions available.
Leveraging years of extensive transportation experience, we have crafted a robust and reliable transportation plan that guarantees timely delivery of goods, regardless of temperature extremes, remote locations, or challenging environments. Our meticulous planning ensures that each batch of products arrives at 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. All metrics exceed standard requirements. Please inform us of the specific national standard you need, and we will verify or test it for you accordingly.
2. What kind of services do you offer?
As a manufacturing factory, we supply pipe products, pipe fittings, packaging, and shipping services. As a professional consultancy, we offer project consulting advice, pipe system solutions, and design suggestions. 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 materials, specifications, logos, packaging, connection methods, and more. Our professional team can also provide tailored solutions for your specific projects, with numerous successful cases to our credit.
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 offered?
We warmly welcome all customers to visit our company and inspect our products in person. We can also conduct strict tests as per your requirements before order confirmation. Additionally, before bulk production, we can dispatch samples for you to perform your own tests to ensure product quality.
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