DN15 Steel pipe galvanized square pipe
Ordinary galvanized steel pipes are seamed steel pipes. Galvanized steel pipes are only available on special request. The way to distinguish between seamed and seamless steel pipes is to measure the outer diameter of the pipe. The manufacturing standards of the two steel pipes are different, and the outer diameters are also different. For example, for a steel pipe with a diameter of 100mm, the outer diameter of the seamed one is 114mm, and that of the seamless one is 108mm.
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Product Description

Galvanized pipe, also known as galvanized steel pipe, is divided into hot-dip galvanized and electro-galvanized. The hot-dip galvanized layer is thick, the coating is uniform, the adhesion is strong, and the service life is long. The cost of electroplating is low, the surface is not smooth, and the corrosion resistance is worse than that of hot-dip galvanized pipe. Galvanized pipes include galvanized round pipes, galvanized square pipes, galvanized seamless pipes, galvanized welded pipes, etc.

In addition, there are cold-galvanized steel pipes, the zinc layer is very thin, it is easy to fall off, and the corrosion resistance is poor. So now cold galvanized steel pipes are banned as water supply pipes.

Commonly used galvanized steel pipe grades: Q215A; Q215B; Q235A; Q235B, etc.

Shanganglian mainly produces hot-dip galvanized steel pipes and electro-galvanized steel pipes, with exquisite workmanship, uniform zinc layer and first-class quality.


Galvanised steel pipes made from carbon steel, longitudinal welded, with zinc coating . For hot and cold water distribution networks, heating installations and technical installations. The superior quality of the used material, allows to estimate a minimum lifespan for the product of 15 years, respecting the proper anticorrosion protection measures.

Product nameGalvanized steel pipe
TypeGalvanized square tube, galvanized round tube, hot-dip galvanized steel pipe, electro-galvanized steel pipe, etc.
GradeQ215A; Q215B; Q235A; Q235B
Wall thickness (mm)2.0, 2.5, 2.8, 3.2, 3.5, 3.8, 4.0, 4.5, etc.Can be customized according to customer needs.
StandardGB/T3091-2015; GB/T13793-2016; GB/T21835-2008
Length (mm)Cut according to customer requirements
Nominal inner diameterDN15;DN20;DN25;DN32;DN40;DN50;DN65;DN80;DN100;DN125;DN150;DN200;DN300, etc.
Zinc layerAccording to customer requirements
Export packagingStandard export packaging, also can be packaged according to customer requirements.

Advantages of galvanized pipes are following below:
Firstly, galvanized pipe after being hot dip galvanized surface can be protected, and inside the cavity of the pipe or any other coating the corner is difficult to enter, deepen the zinc can easily cover to the top, make whole galvanized pipe can be protected.

Second, after being galvanized pipe galvanized its impact resistance and anti-wear properties are very good, because the zinc coating hardness values larger than the hardness of steel, and therefore the impact resistance of hot-dip galvanized after and abrasion resistance is quite good. Furthermore galvanized biggest advantage is in the corner of the zinc layer will be relatively thick and good toughness and abrasion resistance, while other coatings are often in this corner of the thinnest most difficult construction, and therefore are vulnerable injury. 

Third, there is a major feature of hot-dip galvanizing that is occasionally subject to considerable mechanical damage or other causes a small portion of the zinc layer off, the iron-based nudity, then it will play around the zinc layer and other coatings not the same spirit of sacrifice to protect the steel here, so from erosion. 

Finally, the hot-dip galvanizing and other aspects of life and aesthetics of art, life expectancy is in a particular environment, the main agency of the thickness of the coating, and the coating thickness of it but also by the thickness of the galvanized pipe and decisions, and therefore thicker galvanized pipe is more easily coating. Second, in terms of aesthetics and art, at the time it is certain severe corrosive environments, galvanized layer above Zaishi paint to deal with, as long as the selection of the correct paint system, easy construction of its anti-corrosion effect will be very good.

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