Steel Wire Mesh Skeleton Polyethylene Composite Pipe (SRTP/SRCP): Unlock the future of mining technology with our state-of-the-art SRTP/SRCP pipes. Constructed with a high-strength steel wire mesh meticulously helically twisted and seamlessly molded on both sides, these pipes are fortified with modified flame-retardant and antistatic high-density polyethylene (HDPE). This combination delivers unmatched durability and exceptional performance. The high-performance adhesive resin expertly bonds the steel wire skeleton to the inner and outer HDPE layers, merging the sturdiness of steel with the flexibility of plastic. Perfectly suited for underground applications such as water supply and drainage, slurry spraying, gas extraction, and air pressure systems, our composite pipes meet and exceed the stringent demands of the mining industry.
Polyethylene Raw Materials: In coal mining, our inner and outer polyethylene resin layers are made from specially modified flame-retardant and antistatic materials, including carbon nanotube (CNT) modified substances and permanently colored special materials. Developed under our unique intellectual property rights, these materials adhere to MT181 and MT558.1 standards and significantly improve the mechanical properties of our pipes, ensuring they withstand the harshest conditions.
Enhanced Steel Wire: Our pipes incorporate copper-plated steel wire that meets GB/T14450 standards, featuring an impressive strength of 2050 MPa, which greatly exceeds the standard 1850 MPa requirement. This ensures superior durability and reliability in the most challenging environments, providing long-lasting performance.
Adhesive Resin: Our proprietary adhesive resin, developed with cutting-edge technology, offers unparalleled adhesion to steel wire and exceptional process adaptability. This innovative resin ensures a strong bond and significantly enhances the structural integrity of our composite pipes, making them a dependable 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. Shandong Donghong Pipe Industry Co., Ltd. stands as a pioneering enterprise in the development of medium and high-pressure steel wire mesh skeleton polyethylene composite pipe products, featuring an innovative and advanced connection method.
2. As a trailblazing entity, Shandong Donghong Pipe Industry Co., Ltd. has introduced the steel wire mesh skeleton polyethylene composite pipe, specifically engineered for the rigorous demands of underground coal mines.
3. Shandong Donghong Pipe Industry Co., Ltd. is the first enterprise to champion the adoption of wire mesh skeleton polyethylene composite pipes within the coal mining industry, setting a new and robust industry standard.
4. Shandong Donghong Pipe Industry Co., Ltd. leads the industry with the introduction of wire mesh skeleton polyethylene composite pipe products that can withstand immense pressures exceeding 3.5MPa.
5. Shandong Donghong Pipe Industry Co., Ltd. pioneers the development of cutting-edge 'double sealing' and 'one-piece clamp' connection technology, specifically designed for steel wire mesh skeleton polyethylene composite pipes used in the challenging environment of underground coal mines.
The flanged connection with port sealing end faces is integral to the pipe, meticulously designed to address the demands of high-pressure piping applications.
Connection Features:
1) Enhanced automation and high continuous production efficiency;
2) Streamlined process flow, easy process control, and dependable quality;
3) Integrated sealing end face and tube body structure, eliminating secondary injection molding, and ensuring superior pressure-bearing capacity;
4) Extended fixed end face with a 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; dn355 and above models enhance the original double-seal structure.
Universal Black Standard Flange
Our engineered fitting solution provides improved hydraulic performance while utilizing conventional PE jointing methods to maintain the pipe route, even in the most complex construction environments. These fittings are fabricated in-house from our own manufactured pipe range.
These fittings are constructed in a controlled environment at our ISO 9001:2015 and OHSAS 18001:2015 certified facilities.
The high-pressure clamp connection utilizes advanced pipe end molding equipment to form a 'pier edge' at the end of the steel wire pipe, creating a flange root-like structure. This robust structure facilitates the connection between pipe bodies via a cast steel clamp.
Connection Characteristics:
1) The joint is derived directly from the tube body, ensuring high structural strength;
2) Mechanical connection is quick, easy, and does not require special equipment.
Processing Capacity:
3) Simple and efficient connection process with low 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 diverse array of high-pressure engineering fittings. We also offer bespoke customization services to meet unique customer specifications and cater to various industrial and mining conditions. Our manufacturing philosophy is centered on ensuring 'Good Connection for an Excellent System,' guaranteeing 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 serves as the pivotal element in our Composite HDPE Pipe with Steel Mesh at Shandong Donghong Pipe Industry Co., Ltd. It ensures seamless stress transfer during the pipe's pressure handling, marking it as an essential composite material. The superior performance of our product is intricately linked to the exceptional quality of the binder resin. We proudly leverage an advanced raw material design and development platform, meticulously engineered to enhance the binder resin's performance. This guarantees unmatched compatibility with our processes and equipment, resulting in a product that epitomizes unparalleled quality.
Plating plays a critical role by providing robust corrosion resistance and significantly boosting the shear strength between the steel wire and bonding resin. Our comprehensive data testing and rigorous comparisons reveal that tin bronze achieves a remarkable average shear strength of 20.69MPa, while brass stands at 11.42MPa. These variances in shear strength across different plating and bonding resins led us to select tin bronze-plated steel wire as our pressure-bearing substrate. This deliberate choice ensures exceptional performance and reliability, positioning our pipes as the industry benchmark.
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 groundbreaking salt chemical project in Xinjiang Lop Nur, where the process pipeline must meet exceptionally stringent requirements. Annual conveying capacity, pipe bending resistance, and interface stability are all subject to rigorous standards. The expert technical team at Donghong Pipe Industry Co., Ltd. meticulously engineered non-standard, tailored product structures and interfaces to address these specific demands. Additionally, Donghong Pipeline Engineering Company supervised the entire construction process, ensuring the pipeline's optimal performance and operational efficiency.
Wet Copper Refining Project in Kazakhstan
Faced with the challenge of open-air transportation for highly corrosive copper sulfate media, this project required an innovative approach. Donghong's high-pressure corrosion-resistant SRTP, along with advanced composite500 steel-plastic technology and a pioneering double-seal connection, delivered an exceptional solution for the corrosion-resistant transport of these specialized media.
'One Belt, One Road' - Indonesia OBI Nickel and Cobalt Project Deep Sea Landfill Initiative
Located on Obi Island in North Maluku Province, Indonesia, the deep-sea landfill (DSTP) system was selected after an exhaustive analysis of economic investment, operational, and maintenance safety. The dn1000 * 1.6MPa steel wire mesh skeleton polyethylene composite pipe was eventually chosen, highlighting Donghong's innovation and expertise. This project represents a value of 66.484 million yuan.
Donghong has established strategic partnerships with more than five elite 5A-level logistics companies. With years of unparalleled transportation experience, our services encompass 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. Is your product meets the international standard ?
Our products have successfully passed CE, BV, ISO, and WRAS certifications. Each metric showcases a performance that not only meets but often surpasses standard requirements. If you have a specific national standard in mind, please inform us, and we will be pleased to verify or conduct tests to ensure compliance.
2. What kind of service do you offer ?
As a reputable manufacturing factory, we supply a diverse range of pipe products, fittings, and complete packaging and shipping services. As a professional consulting company, we provide expert project consulting, comprehensive pipe system solutions, and professional design recommendations. Additionally, as an engineering-centric enterprise, we offer pipeline contracting services, pipe repair solutions, and complimentary maintenance guidance.
3. Do you support OEM/ODM service?
Absolutely, we provide extensive customization options including material selection, specifications, branding, packaging, and connection methods. Our experienced team also offers bespoke solution recommendations tailored to your unique projects, backed by a plethora of successful case studies.
4. What's your terms of payment?
We accept payment through T/T or L/C at sight.
5. How can you guarantee the goods you offered is qualified?
We enthusiastically invite all customers to visit our company and inspect our products firsthand. In addition, we conduct rigorous tests based on customer requirements before finalizing orders. We also provide samples ahead of bulk production, allowing customers to perform their own quality assessments.
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