Corrugation 300mm x 110mm

Corrugated steel pipe culvers are approved by most of American road and railways administrations and national standards. They are manufactured in accordance to American and Australia standard.

Corrugation 300*110 is independently designed and researched by Yitong Company, the product is between the product Corrugation 200*55 with Corrugation 400*150 and provide more choice for customers.

For corrugation limited, the minimum diameter of the product is 6 meters, the thinnest of wall thickness is 3 millimeter, Special diameter, wall thickness, can be designed and according to customers’ requirements or construction site conditions.

Yitong established in 1998, is China's largest manufacturer of corrugated steel culvert pipes, producing up to 100,000 tons annually. Equipped with advanced production lines, including the world’s leading spiral corrugated steel pipe culvert technology, Yitong has played a pivotal role in the corrugated steel industry both domestically and internationally. With over 55,000 corrugated steel bridges and culverts completed globally, Yitong's solutions are widely used for culverts, bridges, tunnels, ecological crossings, pedestrian walkways, warehouses, and more. Yitong specializes in addressing complex project challenges, including areas with limited concrete materials, difficult foundations, or unique geological conditions. Its products, available in integral or assembled types with diverse shapes such as round, oval, and arch, can be customized based on load, foundation, and environmental conditions. Partnering with Culvert Tech, Yitong delivers innovative solutions for infrastructure projects worldwide.

1.Multiplate structures pipe can be used as:

- culverts
- bridges
- tunnels
- under passed
- ecological crossing
- pedestrian tunnel
- hangers
- shelter
- warehouse
- stores for ammunition
- belt conveyor protection
- ventilating duct
- and for reinforcement and reconstruction of existing structures as well.

Corrugated steel pipe culver can be used for every class of service load provided that appropriate backfilling is performed.

2.Steel

Corrugated steel culvert used for mltiplate structure pipe is produced in accordance with Chinese standard.
Minimum yield strength 235N/mm2 and 345N/mm2
Steel standard Q235 and Q345, Also can accordance with EN10025
Steel standard S355JR, S235JR, S315MC
And can adopt the other standard steel according to customers.

3. Durability

Corrosion resistance of steel is the main factor deciding about the durability of steel structures. Long-term tests done in many countries of world have proven that, the proper corrosion protection of the steel structure let to prolong the life time of structures. Durability of structures built with use of multiplate 150 Corrugated Steel Pipe designed for the zinc coatings give the so-called cathode protection. Thanks to this they can protect the steel also in electrochemical way achieving the multi-elemental corrosion protection system.
Attention:  in strong corrosion environment, we suggest hot-dip plastic on the galvanization, plastic thick 0.3mm, (single face dip), the durability is more than 100 years.
When designing the structure plate culvert pipe durability should be considered with regards to:
- zinc coatings
- paint coatings
-sacrificial thickness of steel as allowance for corrosion
(increasing of the plate thickness)
- other kinds of protections
Corrugated steel culvert is necessary to remark that the corrosion points appear most often in the bottom part, where the stress level in the steel structure is the lowest. It means that by designing the structure according the most stressed cross-section-the upper sphere, there is an additional security reserve in scope of the structure durability.

System of corrosion protection duplex
For longer structure durability (especially in agressive environment) there is a possibility of the additional corrosion protection by epoxy painting. Protection of structure both with zinc coating and epoxy coating creates duplex system. Also, after assembly corrugated steel culvert , we can make the duplex corrosion protection according to customers request color and materials.

Bolts and nuts
The plate making up the structures are connected by high strength bolts of grade not lower than 8.8. Their length varies with the thickness of the steel plates. Generally shorter bolts will be used to join two plates, longer bolts for three plate laps. Nuts should be situated from inside of culvert for bottom an corner plates, but in top plates the nuts should be situated from outside of culvert.