Hot dipped plastic coating steel corrugated pipe is a new kind of products. And our company is the one and only manufacture of this product domestic at present. We have already applied for a patent certificate. The base material of this pipe is steel and the interior and exterior surface sides is coated polyethylene (PE) or epoxy (EP). It enjoys the advantage of both plastic pipes and steel corrugated pipes. The advantage contains high mechanical strength, anticorrosion, easy installation, quick construction, long using life etc. It is very suitable for buried pipes instead of cement pipes and box culvert. It is the national popularized environment protection product.

Usage

.Municipal engineering and construction: civic buried water (rain or sewage) drainage, utility tunnel, cable protection, checking well, tower crane cofferdam, vertical pile shell.

.Road and Railway: culvert, passage, bridge, tunnel overhaul, temporary road, leakage well, etc.

.Coal mine: minerals transferring pipes, passages for persons and machines, mine shaft, etc.

.Public construction: power plan flue pipes, granary, cement bin, gasometer, fermentor, wind, turbine corrugated steel sleeve pipe, etc.

.Martial use: military channel, air defence channel, exit channel.

Depth of cover

The minimum allowable depth of cover is the largest of:

For roads H=B/8+0.2(m) H=B/6(m) and not less than 0.6（m）

For railways H=B/4 and not less than 0.6(m)

There is a possibility to reduce depth of cover provided that suitable checking calculations will be made.

Durability

Flexible structure	Plate thickness	Kinds of standard corrosion protection	Required average min value(um）
plates	≧6mm	Hot zinc galvanizing	85
	≧3mm do < 6mm	Hot zinc galvanizing	70
	≧1.5mm do < 3mm	Hot zinc galvanizing	55
Bolts and nuts	-	Hot zinc galvanizing	45