The Steel Wire Mesh Skeleton Polyethylene Composite Pipe (SRTP/SRCP) represents an innovative leap in mining products. Crafted with a high-strength steel wire mesh skeleton, meticulously helically twisted and molded, this pipe combines the superior attributes of both steel and plastic. The core structure is enveloped in flame-retardant and antistatic high-density polyethylene (HDPE), bonded seamlessly with high-performance adhesive resin, ensuring an unbreakable integration. Perfectly suited for various applications, it excels in underground water supply and drainage, slurry spraying, gas extraction, and air pressure systems.
Polyethylene Raw Materials: Our pipes employ unique flame-retardant and antistatic polyethylene resins, specifically tailored for coal mining environments. These resins, modified with carbon nanotube (CNT) technology and permanent coloring agents, are a proprietary innovation of Shandong Donghong Pipe Industry Co., Ltd. They enhance mechanical properties, ensuring compliance with MT181 and MT558.1 standards while providing superior performance.
Enhanced Steel Wire: We use copper-plated steel wire that meets GB/T14450 specifications. With a remarkable tensile strength of 2050MPA, it far surpasses the standard requirement of 1850MPA, ensuring unmatched durability and reliability.
Adhesive Resin: Our patented adhesive resin, a product of our proprietary technology, offers exceptional steel wire adhesion and outstanding process adaptability, solidifying the integrity and performance of our composite pipes.
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. We are proud to be the pioneering enterprise to develop medium and high-pressure steel wire mesh skeleton polyethylene composite pipe products, complete with a unique and reliable connection method.
2. As trailblazers, we were the first to introduce steel wire mesh skeleton polyethylene composite pipes specifically designed for the challenging environments of underground coal mines.
3. We led the industry by promoting wire mesh skeleton polyethylene composite pipes to the coal mining sector, setting a new standard for underground applications.
4. Our innovation didn't stop there; we were the first to develop wire mesh skeleton polyethylene composite pipe products capable of withstanding pressures above 3.5MPa.
5. We pioneered the 'double sealing' and 'one-piece clamp' connection technologies, enhancing the reliability and safety of steel wire mesh skeleton polyethylene composite pipes in underground coal mines.
Donghong has established a state-of-the-art high-pressure pipe fittings factory. We specialize in producing a comprehensive range of high-pressure engineering fittings. Our expertise extends to customizing specialized fittings tailored to customer specifications and unique industrial and mining conditions. Upholding the philosophy that 'a good connection achieves a superior system,' we ensure every fitting meets the highest standards for optimal performance and reliability.
About
us
Donghong (Shandong Donghong Pipe Industry Co., Ltd., stock code: 603856), headquartered in the culturally rich hometown of Confucius - Qufu, China, has been a pioneering force since its inception in 1997. As a premier manufacturer and service provider in the engineering pipeline sector, Donghong excels in delivering comprehensive pipeline engineering services and acting as a general contractor for pipeline projects. Our extensive portfolio includes four major categories of specialized and custom pipelines: rainwater and sewage drainage pipes, municipal pipelines, industrial and mining pipelines, and pipelines for national key projects. Achieving a historic milestone, Donghong was listed on the main board of Shanghai on November 6, 2017, becoming China's first main board-listed engineering composite pipeline manufacturer.
With a robust team of over 200 R&D personnel and ownership of more than 100 patents, Donghong stands at the forefront of technological innovation. Supported by national technology research and development platforms such as the national enterprise technology center, national CNAS laboratory, academician expert workstation, and postdoctoral workstation, we are committed to advancing the digitalization, informatization, and intelligence of pipeline engineering, thereby steering the industry's growth.
Dedicated to national key strategic projects and essential livelihood initiatives, Donghong significantly contributes to landmark endeavors including the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, One Belt, One Road, standardized farmland projects, urban-rural water supply integration, Liren gas, and centralized heating systems. Our leadership in the engineering pipeline industry ensures we consistently deliver excellence in every project we undertake.
The experimental verification
The Key raw materials
Binder resin is the cornerstone of this exceptional product, crucial for the seamless transfer of stress during the pipe pressure process. As a pivotal composite material, the quality and performance of the binder resin are paramount. Shandong Donghong Pipe Industry Co., Ltd. boasts a specialized raw material design and development platform, fine-tuned to enhance the binder resin and ensure optimal compatibility with our processes and equipment. This targeted approach significantly elevates the product's quality and reliability.
Plating serves a dual purpose: providing robust corrosion protection while significantly enhancing the shear strength between the steel wire and the bonding resin. Rigorous data testing and comparison reveal stark differences in shear strength among various platings; for instance, tin bronze exhibits an average shear strength of 20.69MPa, whereas brass shows 11.42MPa. Given this substantial variance, we meticulously select tin bronze-plated steel wire as our pressure-bearing substrate, ensuring superior performance and durability.
Key Industrial and Mining Application Cases
Xinjiang Key Project Construction - The Process Pipeline of Potassium Salt in Lop Nur, Xinjiang
This groundbreaking project is a nationally significant investment in Xinjiang Lop Nur's salt chemical industry. The pipeline for this process must meet stringent requirements for annual conveyance capacity, bending resistance, and interface stability. The Donghong technical team meticulously designed and developed a bespoke product structure and interface program tailored to the project's unique conditions. Moreover, Donghong Pipeline Engineering Company oversaw the entire construction process, ensuring the pipeline's effective and uninterrupted operation.
Wet Copper Refining Project in Kazakhstan
This project necessitates the open-air transportation of highly corrosive copper sulfate media. Donghong's high-pressure corrosion-resistant Steel Reinforced Thermoplastic (SRTP) pipes, combined with composite 500 steel-plastic technology and a pioneering seal-seal double-seal connection technology, deliver an impeccable solution for 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, North Maluku Province, Indonesia, this ambitious project is spearheaded by U.S. Borealis (Beijing) Pipeline Technology Co., Ltd. The task involved designing the deep-sea landfill (DSTP) system. After a thorough comparison of economic investments and a rigorous safety assessment for operation and maintenance, the DN1000 * 1.6MPa steel wire mesh skeleton polyethylene composite pipe was selected. This choice underscores Donghong's innovative expertise, contributing to a project valued at 66.484 million yuan.
For years, we have partnered with leading logistics companies to craft a seamless and efficient transportation framework. By integrating diverse transportation methods, including steam transportation, railroad transit, and port and shipping logistics, we deliver unparalleled solutions tailored to meet every customer's unique needs.
Leveraging our extensive transportation expertise, we guarantee reliable delivery regardless of weather conditions or geographic challenges. Whether facing extreme heat, arctic cold, remote locales, or harsh environments, our meticulous and comprehensive logistics plans ensure your goods arrive promptly and safely at their destination every time.
1. Does your product meet international standards?
Our products have passed CE, BV, ISO, and Wars certifications, all of which indicate performance figures higher than standard requirements. You can confidently inform us of any specific national standards you require, and we will diligently check or test our products to ensure they meet those standards.
2. What kind of services do you offer?
As a manufacturing factory, we provide high-quality pipe products, pipe fittings, packaging, and shipping services. As a professional consulting company, we offer expert project consulting advice, comprehensive pipe system solutions, and design suggestions. Moreover, as an engineering-focused enterprise, we offer pipeline contracting services and pipe repair services, along with complimentary maintenance guidance to support your needs.
3. Do you support OEM/ODM services?
Yes, we offer extensive customization options, including material selection, specifications, logo design, packaging, and connection methods. Additionally, our professional team can provide tailored solution suggestions for your specific projects. We have numerous successful cases demonstrating our expertise in this area.
4. What are your terms of payment?
We accept T/T or L/C at sight.
5. How do you guarantee the quality of your products?
We warmly welcome all customers to visit our company and inspect our goods in person. We can also conduct rigorous tests as per customer requirements before any order is placed. Furthermore, before commencing bulk production, we can dispatch samples for customers to conduct their own tests to ensure product quality.
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