Steel Wire Mesh Skeleton Polyethylene Composite Pipe (SRTP/SRCP): Discover the epitome of cutting-edge mining technology with our advanced SRTP/SRCP pipes. These pipes are fortified by a high-strength steel wire mesh, intricately helically twisted and precisely molded on both sides. Enhanced with modified flame-retardant and antistatic high-density polyethylene (HDPE), this product ensures unmatched durability and superior performance. The high-performance adhesive resin seamlessly fuses the steel wire skeleton with the inner and outer HDPE layers, merging the resilience 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 meticulously engineered to meet the stringent demands of the mining industry.
Polyethylene Raw Materials: In the specialized field of coal mining, our inner and outer polyethylene resin layers are crafted from flame-retardant and antistatic specially modified materials, including carbon nanotube (CNT) enhanced substances and permanently colored special materials. These materials, developed using our exclusive intellectual property rights, not only comply with MT181 and MT558.1 standards but also significantly bolster the mechanical properties of our pipes. This ensures unparalleled resilience, enabling them to withstand the most arduous conditions.
Enhanced Steel Wire: Our pipes incorporate copper-plated steel wire that meets GB/T14450 standards, exhibiting an extraordinary strength of 2050 MPa, which significantly exceeds the standard 1850 MPa requirements. This guarantees exceptional durability and reliability in the harshest environments, ensuring long-lasting performance.
Adhesive Resin: Our patented adhesive resin, developed with proprietary technology, boasts exceptional adhesion to steel wire and outstanding process adaptability. This revolutionary innovation ensures a robust bond and significantly enhances the overall structural integrity of our composite pipes, making them the 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 the pioneering enterprise, we developed cutting-edge medium and high-pressure steel wire mesh skeleton polyethylene composite pipe products, featuring an innovative connection method.
2. We are the trailblazers in introducing steel wire mesh skeleton polyethylene composite pipes, specifically engineered for the rigorous demands of underground coal mines.
3. Shandong Donghong Pipe Industry Co., Ltd. is the first to champion the use of wire mesh skeleton polyethylene composite pipes in the coal mining sector, setting a new industry standard.
4. Our enterprise leads the way with innovative wire mesh skeleton polyethylene composite pipe products, capable of enduring pressures above 3.5MPa.
5. We pioneered the development of 'double sealing' and 'one-piece clamp' connection technology tailored for steel wire mesh skeleton polyethylene composite pipes used in underground coal mines.
The flanged connection with port sealing end faces is integral to the pipe, meticulously designed to meet the rigorous demands of high-pressure piping applications.
Connection Features:
1) Enhanced automation ensures high continuous production efficiency;
2) Streamlined process flow, ease of process control, and dependable quality;
3) Integrated sealing end face and tube body structure, eliminating secondary injection molding, and ensuring exceptional pressure-bearing capacity;
4) Extended fixed end face with a robust 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. Models dn355 and above enhance the original double-seal structure.
Universal Black Standard Flange
Our engineered fitting solution significantly improves hydraulic performance while utilizing conventional PE jointing methods to maintain the integrity of the pipe route, even in complex construction environments. These fittings are meticulously fabricated in-house from our own manufactured pipe range.
Constructed in a controlled environment at our ISO 9001:2015 and OHSAS 18001:2015 certified facilities.
The high-pressure clamp connection employs 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 innovative structure enables a robust connection between the pipe bodies through a cast steel clamp.
Connection Characteristics:
1) The joint is derived directly from the tube body, ensuring superior structural strength;
2) The mechanical connection is swift, simple, and does not require special equipment.
Processing Capacity:
3) Simple and efficient connection process with minimal 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 state-of-the-art high-pressure pipe fittings factory, dedicated to manufacturing a comprehensive array of high-pressure engineering fittings. We also offer bespoke customization services to meet unique customer specifications and diverse industrial and mining conditions. Our manufacturing ethos is centered on ensuring 'Good Connection for an Excellent System,' guaranteeing superior performance and unwavering reliability.
About
us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) (abbreviation: Donghong, stock code: 603856) proudly calls Qufu, the revered hometown of Confucius in China, its home. Since our establishment in 1997, Donghong has emerged as a leading manufacturer and service provider in the engineering pipeline sector. Our core business spans 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. Demonstrating our industry leadership, Donghong was proudly 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 is our driving force. With a formidable team comprising over 200 R&D personnel and a portfolio boasting more than 100 patents, we leverage the capabilities of national enterprise technology centers, CNAS laboratories, academician expert workstations, and postdoctoral workstations. This extensive infrastructure empowers us to spearhead advancements in digitalization, informatization, and intelligence within the pipeline engineering domain. Our steadfast commitment to technological excellence positions us as industry trailblazers.
Committed to national strategic and livelihood projects, Donghong is instrumental 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 encompasses standardized farmland, urban and rural water supply integration, Liren gas projects, and centralized heating systems. This underscores 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 centers 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 Shandong Donghong Pipe Industry Co., Ltd. meticulously designed and developed non-standard tailored product structures and interface solutions to meet these specific project conditions. Furthermore, Donghong Pipeline Engineering Company supervised the entire construction process, ensuring optimal pipeline performance and operational efficiency.
Wet Copper Refining Project in Kazakhstan
This project necessitated open-air transportation of highly corrosive copper sulfate media. Shandong Donghong Pipe Industry Co., Ltd.'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 Shandong Donghong Pipe Industry Co., Ltd.'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. By trusting us, you gain access to a seamless logistics operation, ensuring your products arrive in pristine condition, right when you need them.
1. Is your product meets the international standard ?
Our products have been rigorously tested and have earned prestigious certifications such as CE, BV, ISO, and WRAS. These accolades confirm that our performance metrics surpass international standards. Should you have specific national standards in mind, we are more than willing to verify or conduct tests to ensure full compliance.
2. What kind of service do you offer ?
As a versatile manufacturing factory, we offer an extensive array of pipe products, pipe fittings, along with packaging and shipping services. In our role as a specialized consulting firm, we provide expert project consulting, innovative pipe system solutions, and strategic design recommendations. Furthermore, as an engineering-oriented enterprise, we excel in offering pipeline contracting services, pipe repair services, and complimentary maintenance guidance.
3. Do you support OEM/ODM service?
Absolutely, we proudly support a wide range of OEM/ODM customization options, encompassing materials, specifications, logos, packaging, and connection methods. Our experienced team is adept at providing bespoke solution suggestions tailored to your project needs, backed by a track record of numerous successful implementations.
4. What's your terms of payment?
We conveniently accept payments via T/T or L/C at sight.
5. How can you guarantee the goods you offered is qualified?
We enthusiastically invite all customers to our facility for an in-person inspection of our goods. Additionally, we are capable of conducting comprehensive tests according to customer specifications prior to order fulfillment. To ensure utmost confidence, we also offer samples before commencing bulk production, allowing customers to perform their own quality evaluations.
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