Rubber Lined Pipes

In order to provide better quality products and services to our customers, our company always takes market demand as the driving force and basis for continuous innovation of our enterprise, and takes professional technical design, excellent product quality and perfect service level as our solemn commitment to the market and society.
Our company adopts advanced UG mould design technology and CNC machining centre to make moulds to ensure the accuracy of product design and product performance.
Our products have passed the EU CE certification and three major system certifications (ISO9001:2015, ISO14001:2015, OHSAS18001:2007).

R&D History
Evergreen (China) Co.,Ltd as a mining and metallurgical equipment(filter press and filter plates) and accessories manufacturer integrating R&D, production and sales, with advanced UG product design, CNC machining centre, 4m*4m*6000T flat vulcanizing machine, φ3.5m*13m vulcanizing tank and a series of large production equipment, since 2015 began to develop steel and rubber composite pipe products, the purpose is to provide mineral processing, thermoelectric, chemical and other The purpose is to reduce the production cost and provide better quality products and services for enterprises such as mineral processing, thermoelectric power and chemical industry.
Our company from the selection of materials, design, respectively, similar products on the market for substantial optimization and improvement, the beginning of 2017, our company began to vigorously promote this product at home and abroad.
In 2018, we undertook a 4.1Km tailings conveying pipeline with PN6.3Mpa, model DN400, for China Gold Group Inner Mongolia Mining Co.
In 2019, we undertook a 5.2km tailings conveying line of PN6.0Mpa for China Gold Group Huatailong Copper Mine, model DN550, which is the first time our company produces large diameter, high pressure steel and rubber composite pipe, and it has been running for nearly 4 years so far and is running well.
In 2020 and 2021, we undertook a total of 12km of tailings conveying pipeline with PN6.3Mpa pressure for Shanxi Baoshan Mining Industry, model DN250.
In 2021, we undertook a DN600 and DN700 process pipeline for a copper mining project in Kazakhstan.
In 2022, we undertook a 9km steel and rubber composite pipeline line with PN4.0Mpa, type DN400, for the Huayou Cobalt Project in Zimbabwe.
At present, our company has established cooperation with many domestic and foreign mineral processing enterprises.

Our self-developed “balloon traction” and “no seam” pipe lining processes are superior to other manufacturers’ “airbag direct expansion” and “seam” processes. Seamed” process.
① “Balloon traction” process: our company independently developed a new process of pipe lining, which refers to the use of special balloon traction from one end of the pipe mouth to the other end, to drive out the gas between the rubber and the inner wall of the steel pipe, so that the rubber lining on the inner wall of the steel pipe.
When the balloon or airbag is lined with a constant air pressure, the area under pressure of the balloon is much smaller than that of the airbag, so the pressure per unit area of the rubber and steel pipe is much higher in the “balloon traction type” than in the “airbag direct expansion type”, which ensures This ensures the adhesion of the rubber to the steel pipe. After experimental comparison, the “balloon traction” process is 20-30% stronger than the “airbag direct expansion” process in terms of rubber-metal bonding strength, and the “balloon traction” process takes up less labour and is more productive. process takes up less labour and the production efficiency is twice as high as that of the “airbag direct expansion” process, which is far ahead in the rubber-lined pipeline industry.
② “No seam” process: Some manufacturers currently use the “seam” process to make rubber lined pipes. The disadvantage of this is that the seam area is easily cracked under the wash of the slurry for years and years until the rubber lined pipe is decoupled, resulting in blockage of the pipe body and affecting production. Our company introduced rubber extrusion line to extrude the whole rubber pipe, the whole lining into the steel body wall, so as to ensure the smooth inner wall of the rubber lining pipe, but also to improve the service life. 

With the current configuration of our equipment and personnel, we can produce up to 50 km of steel and rubber composite pipes of DN100-DN400 and up to 30 km of steel and rubber composite pipes of DN500-DN800 every year.