The Steel Wire Mesh Skeleton Polyethylene Composite Pipe (SRTP/SRCP) represents a groundbreaking innovation in mining products. Reinforced with high-strength steel wires intricately twisted and molded into a mesh skeleton, this composite pipe uses modified flame-retardant and antistatic high-density polyethylene (HDPE). The high-performance adhesive resin seamlessly bonds the steel wire skeleton to the inner and outer HDPE layers, merging the strengths of both steel and plastic pipes. This versatile product is predominantly employed in underground water supply, drainage, slurry spraying, gas extraction, and air pressure applications.
Polyethylene Raw Materials: The inner and outer polyethylene resin utilized in our coal mine pipes incorporates specialized flame-retardant and antistatic modified materials, including carbon nanotube (CNT) modified substances and permanently colored special materials, all of which are developed with our proprietary technology. In compliance with MT181 and MT558.1 standards, these materials exhibit enhanced mechanical properties, significantly elevating the pipe's performance.
Enhanced Steel Wire: Our pipes feature copper-plated steel wire that adheres to GB/T14450 standards, boasting an impressive strength of 2050MPA, far surpassing the standard requirement of 1850MPA.
Adhesive Resin: Our patented adhesive resin, developed with proprietary technology, offers exceptional steel wire adhesion and unparalleled process adaptability, ensuring a durable and reliable bond.
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 in developing medium and high-pressure steel wire mesh skeleton polyethylene composite pipe products with an advanced and robust connection method.
2. The leading innovator in creating steel wire mesh skeleton polyethylene composite pipes specifically designed for underground coal mine applications.
3. The trailblazer in introducing wire mesh skeleton polyethylene composite pipes to the coal mining sector, revolutionizing industry standards and practices.
4. The first enterprise to achieve the development of wire mesh skeleton polyethylene composite pipe products that can withstand pressures above 3.5MPa.
5. The foremost developer of the revolutionary 'double sealing' and 'one-piece clamp' connection technology, tailor-made for steel wire mesh skeleton polyethylene composite pipes used in hazardous underground coal mines.
Donghong has established a state-of-the-art high-pressure pipe fittings factory, dedicated to producing a diverse range of high-pressure engineering fittings. We also offer bespoke customization services to cater to unique customer specifications and varying industrial and mining conditions. This commitment ensures that we embody our manufacturing philosophy: 'Good connection leads to a superior system.'
About
us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) (abbreviation: Donghong, stock code: 603856) is headquartered in Qufu, China, the hometown of Confucius. Established in 1997, Donghong stands as a premier manufacturer of engineering pipelines, a well-versed pipeline engineering service provider, and a leading general contractor in pipeline engineering. Our robust portfolio features four distinct categories of functional and customized pipelines: rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and pipelines tailored for national key projects. On November 6, 2017, Donghong made a remarkable entry onto the main board of Shanghai, earning the distinction of being China's first main board-listed engineering composite pipeline manufacturer.
Donghong boasts a formidable team of over 200 R&D personnel and holds more than 100 patents. Leveraging esteemed national platforms like the national enterprise technology center, CNAS laboratory, academician expert workstation, and postdoctoral workstation, we delve deep into the realms of digitalization, informatization, and intelligence in pipeline engineering. Our commitment to innovation propels us to the forefront of the engineering pipeline industry.
Our company proudly engages in pivotal national strategic and livelihood projects. By spearheading advancements in the engineering pipeline sector, we contribute significantly to key initiatives such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, One Belt, One Road, standardized farmland, urban and rural water supply integration, Liren gas, and centralized heating. Donghong remains dedicated to shaping the future with our advanced pipeline solutions and unwavering commitment to excellence.
Experimental Verification
Key Raw Materials
Binder resin is pivotal to the performance of this product. It ensures the seamless transfer of stress during the pipe pressure process and is a crucial component in pipe composites. The quality of the binder resin largely determines the overall product quality. At Shandong Donghong Pipe Industry Co., Ltd., we have developed a specialized platform for the design and development of raw materials. This enables us to enhance the binder resin and precisely match it with processes and equipment, ensuring top-tier performance.
Plating serves dual purposes: corrosion protection and the enhancement of the shear strength between steel wire and bonding resin. Data testing and comparisons reveal notable differences in shear strengths. Tin bronze exhibits an average shear strength of 20.69MPa, while brass shows 11.42MPa. Given these findings, we have selected tin bronze-plated steel wire as the pressure-bearing substrate due to its superior performance in shear strength, ensuring a more robust and reliable product.
Key Industrial and Mining Application Cases
Xinjiang Key Project Construction - Process Pipeline of Potassium Salt in Lop Nur, Xinjiang
This project represents a significant national investment in Xinjiang's salt chemical industry, focusing on the Lop Nur process pipeline. It boasts an impressive annual conveying capacity, exceptional pipe bending resistance, and stringent interface stability requirements. In response, the Donghong technical team meticulously designed and developed a customized non-standard product structure and interface program tailored to the project's unique conditions. Additionally, Donghong Pipeline Engineering Company managed the entire construction process, ensuring the pipeline's optimal functionality and efficiency.
Wet Copper Refining Project in Kazakhstan
For the open-air transportation of highly corrosive copper sulfate media, Donghong's high-pressure corrosion-resistant SRTP, composite500 steel-plastic composite technology, and seal-seal double-seal connection technology provided an impeccable solution. These innovations effectively addressed the challenges associated with the corrosion-resistant transport of special media.
"One Belt, One Road" - Indonesia OBI Nickel and Cobalt Project Deep Sea Landfill Project
Located on Obi Island in North Maluku Province, Indonesia, this project was undertaken by U.S. Borealis (Beijing) Pipeline Technology Co., Ltd. Tasked with designing the deep-sea landfill (DSTP) system, they conducted a thorough economic investment comparison and safety assessment for operation and maintenance. Ultimately, they selected the DN1000 * 1.6MPa steel wire mesh skeleton polyethylene composite pipe, showcasing Donghong's engineering prowess. The project's value amounted to 66.484 million yuan.
We have established long-standing partnerships with numerous logistics companies. Our advanced transportation model seamlessly integrates 'steam transportation + railroad transportation + port and shipping logistics,' ensuring that we deliver optimal transportation solutions for our valued customers.
Leveraging years of transportation expertise, we guarantee the timely arrival of every batch of goods, irrespective of extreme temperatures, remote locations, or challenging environments. Our comprehensive and adaptive transportation plans ensure that your products reach their destination promptly and securely.
1. Does your product meet international standards?
Our products proudly pass the CE, BV, ISO, and WARS certifications, consistently surpassing standard requirements. Feel free to inform us of any national standard you require; we are fully equipped to check or test it to ensure compliance.
2. What kind of services do you offer?
As a manufacturing factory, we provide high-quality pipe products, pipe fittings, packaging, and shipping. As a professional consulting company, we deliver expert project consulting advice, comprehensive pipe system solutions, and innovative design suggestions. Additionally, as an engineering-focused enterprise, we offer pipeline contractor services, pipe repair services, and provide free maintenance guidance.
3. Do you support OEM/ODM services?
Yes, we offer extensive customization options in materials, specifications, logos, packaging, and connection methods. Our professional team can also provide tailored solution suggestions for your specific projects, backed by successful case studies.
4. What are your terms of payment?
We accept T/T or L/C at sight.
5. How can you guarantee the quality of your products?
We warmly welcome all customers to visit our company and inspect our products firsthand. We also provide rigorous testing as per customer requirements before any order. Moreover, prior to bulk production, we can dispatch samples for customers to conduct their own tests for product qualification.
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