Galvanized Steel Round Tubing

At Yuantai Derun ,we can produce 2 type of galvanized steel round tubing,one is pre galvanized Round steel tubing ,another one is the Hot-Dip Galvanized Steel Round Tubings.

Galvanized steel round tubings are widely used in manufacturing industries such as construction, machinery, coal mining, chemical engineering, electricity, railway vehicles, automotive industry, highways, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, and mining machinery.

Let us to see galvanized steel round tubing sizes

（1）Pre Galvanized Steel Round Tubing Sizes

Φ：10.3-3620mm 

The surface of high-quality galvanized pipe fittings should have a complete coating, consistent color, uniform transition, and no sags, drips, or excess lumps on the surface. The surface of the pipe fittings shall not have defects such as missed plating or exposed iron.

The thickness of the zinc layer on galvanized pipes is an important indicator for judging the quality of galvanizing, usually measured in units μ M represents the weight of the galvanized layer per square meter (g/m2), and the conversion formula is: 1g/m2=0.14 μ M. Due to the different magnetic and polarizability between zinc and steel, the determination of zinc layer thickness can be non-destructive measured using a zinc layer thickness gauge. To determine the weight of the zinc layer, it is necessary to scrape and sample the zinc layer, and measure it using chemical methods such as antimony chloride method.

The high-quality galvanized layer has a uniform texture and no leakage or damage after plating. The galvanized pipe fittings can be immersed in a certain concentration of copper sulfate solution for a certain number of times and time. If there is no red leaching substance (metal copper) on the surface, it can be considered that the galvanized pipe fittings have no leakage or damage defects after plating.

The adhesion of the galvanized layer is a standard for measuring the firmness of the bonding between the galvanized layer and the steel pipe. After soaking the steel pipe in a zinc bath for a certain period of time, the surface of the steel pipe will react with the galvanized liquid to form a zinc iron mixed layer. A scientifically sophisticated galvanizing process will form a zinc iron mixed layer with sufficient thickness to improve the adhesion of the zinc layer. The adhesion of the galvanized layer can be monitored by lightly tapping with a rubber hammer, preferably to ensure that the coating does not fall off after a certain number of taps.

Each steel pipe must pass the inspection layer by layer. Only the products that pass the inspection can leave the factory. Never let an unqualified product flow into the market

The galvanized round pipes produced by Yuantai Derun can also provide you with the following value-added services: