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Galvanized steel pipe

Hot-dip galvanized steel pipe is to react the molten metal with the iron matrix to form an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is to first carry out steel plate pickling, in order to remove iron oxide on the surface of the steel pipe, pickling, ammonium chloride or zinc chloride or ammonium chloride mixed with zinc chloride aqueous solution tank cleaning, and then sent to the hot dip tank. The hot-dip galvanized coating is uniform, has strong adhesion and long life.

Materials: Gr.B, S195T, ST35 etc.

Standard:  A53, EN10255, DIN2440, BS1387 etc.

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Hot dip galvanized steel pipe type

Hot dip galvanized hollow steel pipes, HDG hollow steel pipe, HDG square tube, HDG round tube, HDG rectangular tube, HDG erw welded pipe, HDG seamless pipe, HDG spiral welded pipe

Hot dip galvanized steel pipe specification

  • Standard: GB/T3091 – 2001, A53, EN10255, DIN2440, BS1387 etc.
  • Materials: Q235, Q345B, Gr.B, S195T, ST35 etc.
  • Outer diameter: 1/4` – 40`.
  • Wall thickness:  Sch5 – Sch80(1.0mm – 25.4mm).
  • Length: 2m – 12m.
  • Application: construction, fire control, pipeline etc.

Hot dip galvanized steel pipe advantages

Shenlong Hot dip galvanized steel pipe with a zinc layer thickness in accordance with ISO standards and good corrosion resistance.


Without pipe galvanizing, corrosion is a persistent danger to metal; therefore, it must be protected. It is possible to create oxidation in metal when corrosive elements such as salt, dirt, moisture, or chemicals come into contact with the iron in the metal. Rust is formed as a consequence of the reaction. Because of the corrosion of metal, pipes are at risk of collapsing or exploding.

Adding a coating of zinc to metal during the pipe galvanizing process serves to protect it against corrosion. This zinc reinforcement provides two types of protection for metals:

It acts as a protective barrier between the sensitive iron and the corrosive elements.

Galvanic corrosion is prevented by using this product. When compared to the majority of metals, zinc exhibits significantly anodic characteristics. When it comes into touch with a more noble metal, it acts as an anode, releasing electrons very immediately. When a noble metal would otherwise be taking electrons from carbon steel or another basic metal, this sacrifice comes in useful.


– Cost-Effectiveness
The question you may be asking is: “If pipe galvanizing provides anti-corrosive characteristics, why not just utilize stainless steel pipes?” The solution is a matter of money. However, although stainless steel has corrosion resistance built into its design, it is often more costly than conventional carbon steel. Consequently, galvanizing is a reasonably inexpensive method of adding an additional layer of protection to otherwise durable materials.

– Performance
Alternatives such as paint or other basic coverings, on the other hand, may seem to be a straightforward answer. However, they are not without their drawbacks. For starters, they often chip or scrape the surface, exposing the underlying metal to rust. Second, since they are readily worn away, they must be reapplied on a regular basis. Finally, when subjected to extreme temperature fluctuations or external erosion, they have a tendency to flake or peel off.

– Less Labor-Intensive
Galvanized metal is subjected to a rigorous production process, but after it has been applied to metal, the product is ready to be sent out the door. As a result, your team will not be burdened with the time-consuming and labor-intensive operations of applying paints or other coatings. You will also save time by not having to spend time prepping surfaces, monitoring supports for scratches, or repainting your walls.

Hot Dip Galvanized Steel Pipe Technical Data

Galvanized steel pipe (5)

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