Steel Wire Mesh Skeleton Polyethylene Composite Pipe (SRTP/SRCP): Discover the future of mining infrastructure with our cutting-edge SRTP/SRCP pipes. Expertly engineered with high-strength steel wire mesh, meticulously helically twisted and molded on both sides, and augmented with modified flame-retardant and antistatic high-density polyethylene (HDPE), this innovation delivers unmatched durability and exceptional performance. The high-performance adhesive resin ensures a flawless bond between the steel wire skeleton and the HDPE layers, combining the formidable strength of steel with the adaptability of plastic. Perfectly suited for underground water supply and drainage, slurry spraying, gas extraction, and air pressure applications, our composite pipes are designed to exceed the rigorous demands of the mining industry.
Polyethylene Raw Materials: In the challenging world of coal mining, we utilize specially modified flame-retardant and antistatic polyethylene resin layers, incorporating advanced carbon nanotube (CNT) modified substances, and permanently colored special materials. Developed under our unique intellectual property rights, these materials not only meet MT181 and MT558.1 standards but also significantly enhance the mechanical properties of our pipes, ensuring peak performance under the harshest conditions.
Enhanced Steel Wire: Our pipes feature copper-plated steel wire that adheres to GB/T14450 standards, offering an extraordinary tensile strength of 2050 MPa, vastly surpassing the typical 1850 MPa requirements. This guarantees unparalleled durability and dependable performance in the most demanding environments.
Adhesive Resin: Our proprietary adhesive resin, developed through cutting-edge technology, provides superior adhesion to steel wire and exceptional process adaptability. This breakthrough innovation ensures a robust bond, significantly enhancing the structural integrity of our composite pipes, making them an ideal choice for demanding 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. As a trailblazer in the industry, we are the first to develop medium and high-pressure steel wire mesh skeleton polyethylene composite pipe products, featuring a groundbreaking innovative connection method.
2. Leading the charge, we introduced the pioneering steel wire mesh skeleton polyethylene composite pipe, meticulously engineered for underground coal mines.
3. We are the first to advocate for wire mesh skeleton polyethylene composite pipes in the coal mining sector, setting an unparalleled industry benchmark.
4. Innovating beyond expectations, we are the first to design wire mesh skeleton polyethylene composite pipes capable of enduring pressures above 3.5MPa.
5. We are the pioneering force behind the development of 'double sealing' and 'one-piece clamp' connection technology, uniquely tailored for steel wire mesh skeleton polyethylene composite pipes used in underground coal mines.
The flanged connection, featuring port sealing end faces, is seamlessly integrated into the pipe design. This meticulous engineering ensures it meets the rigorous demands of high-pressure piping applications, providing durability and reliability.
Connection Features:
1) Enhanced automation, ensuring high continuous production efficiency and minimized manual intervention;
2) Streamlined process flow offers easy process control and consistently dependable quality;
3) Integrated sealing end face and tube body structure eliminate the need for secondary injection molding, ensuring exceptional pressure-bearing capacity;
4) Extended fixed end face with a riveted structure significantly mitigates system risks, enhancing overall safety.
Processing Capacity:
Accommodates dn50-dn315mm models with a pressure level connection capacity ranging from 0.8MPa to 10.0MPa. For dn355 and above models, the innovative double-seal structure enhances performance and reliability.
Universal Black Standard Flange
Our engineered fitting solution is designed to improve hydraulic performance while maintaining the integrity of the pipe route using conventional PE jointing methods. These fittings are ideal for complex construction environments and are fabricated in-house from our own manufactured pipe range.
Constructed in a controlled environment, our fittings meet the high standards of ISO 9001:2015 and OHSAS 18001:2015 certifications, ensuring top-notch quality and safety.
The high-pressure clamp connection employs specialized pipe end molding equipment to form a 'pier edge' at the end of the steel wire pipe, resembling a flange root. This robust structure allows for secure connections between pipe bodies through a cast steel clamp.
Connection Characteristics:
1) The joint, derived directly from the tube body, ensures high structural strength and integrity;
2) Mechanical connection is quick and easy, requiring no special equipment, thus simplifying the assembly process.
Processing Capacity:
3) Simple and efficient connection process with low technical requirements for personnel, enhancing productivity.
Processing Capacity:
Supports dn90-dn315mm models with a pressure level ranging from 1.6MPa to 3.5MPa, ensuring versatility and robustness.
Shandong Donghong Pipe Industry Co., Ltd. has established a state-of-the-art high-pressure pipe fittings factory. We specialize in manufacturing a diverse array of high-pressure engineering fittings and offer bespoke customization services to meet unique customer specifications and varied industrial and mining conditions. Our manufacturing philosophy, 'Good Connection for an Excellent System,' underscores our commitment to 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 stands as the cornerstone of our Composite HDPE Pipe with Steel Mesh, ensuring flawless stress transfer during the pipe pressure process. As a vital composite material, its performance is paramount to our product's excellence. At Shandong Donghong Pipe Industry Co., Ltd., we take immense pride in our advanced raw material design and development platform, which meticulously enhances the binder resin's capabilities. This ensures impeccable compatibility with our processes and equipment, resulting in a product that exemplifies superior quality and reliability.
Plating serves dual crucial functions: providing robust corrosion protection and significantly enhancing the shear strength between the steel wire and bonding resin. Through extensive testing and meticulous comparisons, we found that tin bronze achieves an impressive average shear strength of 20.69MPa, whereas brass registers at 11.42MPa. These differences in shear strength led us to select tin bronze-plated steel wire as our pressure-bearing substrate. This strategic choice guarantees exceptional performance and reliability, making our pipes a benchmark in the industry for durability and strength.
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, 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. Does your product meet international standards?
Our products go beyond merely meeting international standards-they excel! With CE, BV, ISO, and WRAS certifications in our portfolio, you can rest assured of superior performance metrics. Inform us of any specific national standards you need, and we will gladly verify or test our products to meet those specifications.
2. What kinds of services do you offer?
As a versatile manufacturing factory, we offer an extensive array of pipe products and fittings, coupled with robust packaging and reliable shipping services. Our professional consulting branch provides expert project consulting, tailor-made pipe system solutions, and insightful design suggestions. Furthermore, our engineering-focused division offers comprehensive pipeline contracting, efficient pipe repair services, and free maintenance guidance to ensure a seamless project execution.
3. Do you support OEM/ODM services?
Absolutely! We provide extensive OEM/ODM services that include customization of materials, specifications, logos, packaging, and connection methods. Our expert team is dedicated to offering tailored solution suggestions for your unique projects, backed by numerous successful cases that speak to our expertise.
4. What are your terms of payment?
We accept flexible payment terms including T/T (Telegraphic Transfer) and L/C (Letter of Credit) at sight for your convenience.
5. How can you guarantee the quality of your goods?
We invite and encourage all customers to visit our facilities for a personal inspection of our products. To ensure your utmost satisfaction, we conduct rigorous tests as per your requirements before finalizing any order. We also provide samples prior to bulk production, allowing you to perform your own quality assessments.
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