Steel Wire Mesh Skeleton Polyethylene Composite Pipe (SRTP/SRCP for short) is a groundbreaking solution in the mining industry. Engineered with a high-strength steel wire mesh skeleton that is helically twisted and molded to deliver unmatched durability, this pipe is encased in modified flame-retardant and antistatic high-density polyethylene (HDPE). The composite structure is further fortified with a high-performance adhesive resin. This cutting-edge design seamlessly integrates the superior attributes of both steel and plastic, making it an ideal choice for a myriad of applications such as underground water supply and drainage, slurry spraying, gas extraction, and air pressure management.
Polyethylene Raw Materials: The inner and outer polyethylene resin utilized in coal mining fields is meticulously crafted from flame-retardant and antistatic specially modified materials. These materials, enriched with carbon nanotube (CNT) modifications and permanent coloring additives, are developed under our independent intellectual property rights. Compliant with MT181 and MT558.1 standards, these pipes exhibit superior mechanical properties, ensuring reliable performance in demanding environments.
Enhanced Steel Wire: We employ copper-plated steel wire that meets GB/T14450 standards. Boasting a strength of 2050MPA, it significantly exceeds the standard requirement of 1850MPA, providing exceptional strength and reliability.
Adhesive Resin: Our proprietary adhesive resin, developed through our independent intellectual property rights, offers unparalleled steel wire adhesion and outstanding process adaptability. This innovation sets a new benchmark in the industry, ensuring superior performance in all applications.
| 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 |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
/ |
| Note: can be customized by customer's needs. |
1. As the pioneering enterprise, we developed sophisticated medium and high-pressure steel wire mesh skeleton polyethylene composite pipe products, accompanied by their trailblazing connection methods.
2. We stand as the trailblazing company that introduced the revolutionary steel wire mesh skeleton polyethylene composite pipes, specifically engineered for the rigorous demands of underground coal mines.
3. As the groundbreaking entity in the industry, we not only promoted the use of wire mesh skeleton polyethylene composite pipes in underground coal mines but also led the industry with our cutting-edge innovations.
4. We are the foremost enterprise dedicated to developing wire mesh skeleton polyethylene composite pipe products that can withstand pressures exceeding 3.5MPa, setting new industry standards.
5. Leading the way, we created and implemented the advanced 'double sealing' and 'one-piece clamp' connection technology for steel wire mesh skeleton polyethylene composite pipes, specifically for use in underground coal mines.
Shandong Donghong Pipe Industry Co., Ltd. has proudly established a state-of-the-art high-pressure pipe fittings factory, dedicated to producing a wide range of high-pressure engineering fittings. With a commitment to innovation and excellence, we also offer bespoke customization services, tailoring special fittings to meet unique customer requirements and specific industrial and mining conditions. Our manufacturing philosophy is centered on achieving 'good connection to achieve a good system,' ensuring unparalleled performance and reliability for every project. Experience the perfect blend of precision and durability with our expertly crafted solutions.
About
us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) (abbreviation: Donghong, stock code: 603856) is strategically headquartered in the historic city of Qufu, China, the hometown of Confucius. Founded in 1997, Donghong stands as a premier manufacturer and service provider in the engineering pipeline sector. We excel as a general contractor for pipeline engineering projects, offering 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. Celebrated as the first main board listed engineering composite pipeline manufacturer in China, Donghong proudly listed on the Shanghai main board on November 6, 2017.
Boasting a robust team of over 200 R&D personnel and an impressive portfolio of over 100 patents, Donghong leverages national technological platforms such as the national enterprise technology center, CNAS laboratory, academician expert workstation, and postdoctoral workstation. Our commitment to innovation drives our research into the digitalization, informatization, and intelligence of pipeline engineering, positioning Donghong as a leader in the industry.
Donghong is at the forefront of pivotal national and livelihood projects, championing the development of the engineering pipeline industry. Our noteworthy contributions include projects like the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, One Belt, One Road initiatives, standardized farmland, urban-rural water supply integration, Liren gas, centralized heating, and many more essential infrastructure endeavors.
Experimental Verification
Key Raw Materials
The binder resin is an indispensable component of our Srtp HDPE Pipe, crucial for seamless stress transfer during the pipe pressure process. As a vital composite material, its performance is pivotal to the overall quality of our products. At Shandong Donghong Pipe Industry Co., Ltd., we have engineered an advanced raw material design and development platform, specifically tailored to amplify the binder resin's performance. This ensures it achieves unparalleled compatibility with our proprietary processes and state-of-the-art equipment.
Plating in our pipes serves two essential purposes: delivering robust corrosion protection and significantly enhancing shear strength between the steel wire and bonding resin. Our extensive data testing and comparisons have shown that tin bronze achieves an impressive average shear strength of 20.69 MPa, in stark contrast to brass, which averages 11.42 MPa. These pronounced differences in shear strength with varying plating and bonding resins have led us to adopt tin bronze-plated steel wire as our preferred pressure-bearing substrate, offering superior performance and reliability.
Key Industrial and Mining Application Cases
Xinjiang Key Project Construction - Process Pipeline for Potassium Salt in Lop Nur, Xinjiang
As part of a prestigious national key investment project in Xinjiang Lop Nur, this initiative is dedicated to optimizing salt chemical processes. It features rigorous demands for annual conveying capacity, pipe bending resistance, and interface stability. Donghong's expert technical team has intricately designed and crafted a non-standard, tailor-made product structure and interface program to meet these exceptional project requirements. Furthermore, Donghong Pipeline Engineering Company supervised the entire construction process to ensure the pipeline operates with peak efficiency.
Wet Copper Refining Project in Kazakhstan
This project involves the open-air transportation of highly corrosive copper sulfate media, demanding superior corrosion resistance. Donghong's high-pressure, corrosion-resistant SRTP, enhanced with Composite500 steel-plastic composite technology and Seal-Seal double-seal connection technology, provides an unparalleled solution for the secure and efficient transport of these 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 groundbreaking project is executed by U.S. Borealis (Beijing) Pipeline Technology Co., Ltd. The deep-sea landfill (DSTP) system was meticulously selected after extensive economic investment analyses and stringent operation and maintenance safety evaluations. The initiative incorporates DN1000*1.6MPa steel wire mesh skeleton polyethylene composite pipes, valued at 66.484 million yuan, reflecting Donghong's unmatched expertise and innovative prowess.
Through our enduring alliances with top-tier logistics companies, we have crafted a sophisticated and highly efficient transportation model. By seamlessly integrating 'steam transportation + railroad transportation + port and shipping logistics,' we deliver the most dependable and effective transport solutions to our valued customers.
Harnessing our vast experience in transportation, we ensure that, irrespective of extreme temperatures, remote locations, or challenging conditions, our expertly coordinated logistics guarantee that every shipment reaches its destination swiftly and securely.
1. Does your product meet international standards?
Our products not only meet but also surpass CE, BV, ISO, and WARS certifications. They exceed standard requirements to ensure quality and safety. If you have specific national standards, please inform us, and we will verify or test them to ensure full compliance.
2. What kind of services do you offer?
As a dedicated manufacturing factory, we supply pipe products, fittings, packaging, and shipping services. As a professional consulting firm, we provide expert project advice, comprehensive pipe system solutions, and design recommendations. Moreover, as an engineering-focused enterprise, we specialize in pipeline contracting, repair services, and offer free maintenance guidance.
3. Do you support OEM/ODM services?
Absolutely, we offer extensive customization options in materials, specifications, logos, packaging, and connection methods. Our expert team delivers tailored solutions for your unique projects, supported by numerous successful case studies that demonstrate our capabilities.
4. What are your payment terms?
We accept payments via T/T or L/C at sight.
5. How do you guarantee the quality of your goods?
We warmly welcome all customers to visit our company and inspect our products firsthand. Additionally, we can conduct rigorous tests according to your specifications before you place an order. We also offer to send samples before bulk production for your own testing and qualification to ensure satisfaction.
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