Corrugated Steel Sewer Pipe

Corrugated metal culvert, it also has some other names, like corrugated steel pipe, most of people will think this is a metal pipe, but in fact, this is not a pipe, this is a steel structure. It just like other steel structure, it is assembled by difference parts, connected by bolts, nuts, after assembling, it is with a function, it is not a simple pipe or steel plate. This is a steel structure which will interaction with soil, then with a strong strength to be an culvert, arch, safe room, bridge, etc.

- YONGXI Corrugated Steel Sewer Pipe

Why we say corrugated steel pipe is a steel structure?

Material: the main material of corrugated steel pipe is corrugated steel structure plate, it also with accessories like bolts, nuts, washers and gasket. The bolts nuts and washers are for the connection of corrugated steel pipe, and the gasket is for stick and fix in the gap between the corrugated structure plates, it can prevent water..

Process: the corrugated steel pipe is made in some process, step by step. Firstly, the material is black steel sheet, then we will rolling corrugation on the steel sheet, then punching or drilling holes on the sheet with corrugation, after that, we will bending the sheet in the arc as we design, finally, hot dip galvanization on the corrugated steel structure plate. Normally, before producing in batch, we produce 2-3 rings firstly and pre assemble it in workshop, after measure all size of the structure, then we start to produce in batch..

Application: the corrugated steel pipe, its shape, size, are all need design and calculate to confirm the reasonable cross section shape and bearing strength. Under the subgrade of high way, it have to be with enough bearing strength to support the high way to prevent collapse. It can be applied in culvert, arch, bridge, tunnel, pass way, etc, and its main function is just support. It will bearing the dead load and live load on the top of the structure.

HS code for our corrugated steel pipe

We exported corrugated steel culvert so many years, and we suffered a problem of HS code on the customs clearance. We use the HS code 7308900000 all the time, this HS code is for steel structures. But the customs says, our product is not a structure, it should be another type of metal production. We did not agree the customs words, then we list our product details above, after discuss, the customs get a result as below:

Corrugated steel pipe is one kind of steel structure, it is combined by difference steel parts to be a structure which is with a bearing strength. It is process on the steel sheet to be a structure, it is accord to the HS code 7308900000 description, it has a function like a bridge and section of bridge. So if any people says corrugated steel pipe is a pipe, we can say no, it is a steel structure.