On April 4^th, a new practical patent named “a composite hot galvanized steel tube which can be successively resin-painted online” has

been national authorized with the patent no. of ZL 2014 2 0789848.2.

This kind of new practical patent has unveiled the mystery over the composite hot galvanized steel tube which can be successively resin-

painted online, including the main body of the steel tubes. By galvanizing the interior tube wall, the external tube wall will be coated with

the galvanized layer, the winding layer and the UV layer, which can help to improve the weak anti-corrosive capacity of the welded joints.

Processed under the high-temperature with high speed, the steel tubes are firmly adhesive to the painting layer and the hot galvanized

layer with a higher anti-corrosive performance than other common hot galvanized tubes.

To date, this kind of new patent has been employed in real manufacturing process, yielding products with higher corrosive proof function

and more reliable quality.

ADTO group always renders the technical innovation and quality assurance as its core motivation in the sustainable progress. By

injecting more effort in technical research and improvement and adhering to the working ethic of quality determines safety and safety

comes with the top priority, ADTO has already produced more than 10 product innovations with over more 40 new patents and has

received a sound public reputation ever since.