Nominal diameter (outside diameter, inside diameter), wall thicknesses of valley and interior layer, pipe socket length, ring stiffness, ring flexibility and impact resistance.

There are a number of standards of corrugated pipes used in different applications. Here we only list some standards for sewage and drainage applications for reference as you can see from below

ISO 21138-3
EN13476-3 (Europe)
DIN16961 (Germany)
GB/T19472.1 (China)
IS16098.2 (India)
ASTM F2648, ASTM F2306 (USA)
AASHTO M 252, AASHTO M 294 (USA)

There are a number of standards of corrugated pipes used in different applications. Here we only list some standards for sewage and drainage applications for reference as you can see from below:

• Cable protection conduits for power & telecom cables
• Protection pipes for district heating systems
• Drainage pipes for streets, factories, plazas, golf courses and stadiums
• Stormwater and sewage pipes
• Fresh air ventilation

According to various applications, a number of materials can be used to produce corrugated pipes, like PE, PP, PVC and Nylon. PE and PP are the two most commonly used materials. Besides, recyclable materials can be used for production of sewerage and drainage pipes. For more information, if you're interested to learn more about it, welcome to contact us.

As for HDPE and PP corrugated pipes, our extrusion line can produce in-line double-layer cuff. As for PVC corrugated pipe, off-line cuff production method is applied (produce corrugated pipe first, then make pipe cuff with cuff production machine). There are two types of cuffs for the HDPE and PP corrugated pipes, one is single-layer cuff and the other is double-layer cuff. Our extrusion lines can produce both cuffs. ZhongyunTech has its own unique NPM Technology and PBM Technology, which can help to produce perfect double-layer cuff, with firm adhesion of inner layer and outer layer together from the starting point to the end point. If you want to know more about this, please click our "Advantages" page.

Generally speaking, the corrugated pipe to be coupled requires specific connecting method to accommodate various application needs. Here we take the connection of corrugated pipes used in sewage & drainage system as an example.

If the corrugated pipe is made with in-line cuff (socket), pipe connection can be carried out by means of inserting spigot with rubber ring.

If the corrugated pipe has is made with no in-line cuff.
The pipes can be connected utilizing couplers.

Or to form an independent socket by injection molding or extrusion process, and then weld the socket onto the ends of corrugated pipes. The forming and welding of socket can be accomplished by one machine. After this, pipes can be connected inserting spigot with rubber ring into the socket. This connecting method can provide strong pipe joining.

We manufacture the complete set of corrugated pipe extrusion line from extruder to the pipe tilting table, so we provide turnkey solutions to our customers. All the machines of the extrusion line are manufactured in-house by us, so the quality of ZhongyunTech's machines is controlled meticulously. Our manufacturing plant comes fully equipped with world's advanced high-precision CNC machines and quality control devices, such as Japanese TOSHIBA gantry machining center, German-Japanese joint venture DMG-MORI flexible automation line, Switzerland +GF+Mikron CNC machining center, Italian PAMA boring-milling machine, Japanese MAZAK flexible automation line. By using these equipment, our processing accuracy can reach 0.003mm, and our Sweden Hexagon 3D coordinate measuring machine (CMM) has an accuracy of 0.0018mm. As the entire corrugated pipe extrusion line is independently manufactured by ZhongyunTech, so that you can directly contact us if you have any issues or concerns about the corrugated pipe line, you do not have to go to many different manufacturers to find the solution. Besides, we can also provide customers with standalone machines from the corrugated pipe line, for example, a pipe corrugator or a pipe cutter. If you want to know more about our product, please Click here.

Yes. We have a team of 15 professional after-sales engineers.

Our after-sales service includes

• Installation and commissioning of ZhongyunTech's corrugated pipe machines
• Training of customers’ technicians on how to use and maintain the corrugated pipe machines
• Troubleshooting via phone, Internet or on-site
• General overhaul of corrugated pipe extrusion line
• Relocation of machines
• Upgrade the machines at customer factory
• Regular inspection of corrugated pipe machines

Yes, we have a team of passionate staffs that can design machines per your request. For example, one of our customers asked to produce corrugated pipes with super high ring stiffness, so we designed and manufactured hexagonal corrugated pipe machines for this customer.

Yes, our ZC-180H extrusion line can produce both single and double wall corrugate pipes.
For double wall corrugated pipe, it can produce pipes of diameters ranging from OD40mm to OD200mm;
For single wall corrugated pipe, it can produce pipes of diameters ranging from OD25mm to OD200mm.
For more information of ZC-180H line, please Visit here

Yes, our extrusion line can be configured with perforator as per your request.

Yes, from designing to manufacturing, all of our moulds are done in our company. We are capable of customizing moulds for customers from all around the world. No matter your corrugator uses vertical air-cooling or water-cooling method, we can design and manufacture suitable moulds for you. In order to produce excellent quality moulds, we have built a state-of-the-art manufacturing plant with experienced technicians and world's advanced machine tools with accuracy up to 0.003mm.

Yes, you are more than welcome to visit us. We will show you around our manufacturing plant.