Hot-dip galvanized pipe pipes are dipped into a bathtub after manufacturing. Thicknesses using this method will reach a minimum of 45µm and the thickness of the galvanized layer is affected by many factors, including the surface of the steel, when the steel was immersed in the bath, the composition of the steel and the size and thickness of the steel.
One advantage of hot-dip galvanizing is that it covers the entire part, including edges, welds, etc., giving it complete corrosion protection. The final product can be used outdoors in all different weather conditions. It is currently the most popular galvanizing method and is widely used in the construction industry.
Pre-galvanizing pipe, also known as rolled galvanized pipe, hot-dip galvanized pipe or continuous hot-dip galvanized pipe. Pre-galvanized steel pipes are steel pipes that are galvanized in the form of steel sheets before further production. After the sheet is brought into the factory to be galvanized, it is cut to size and backflushed. Tube thickness is minimum 12µm.
One of the advantages of pre-galvanized steel over hot-dip galvanized steel is its better appearance. Pre-galvanized materials are used in a wide variety of products including pipes, lips and open channels.
Service life under different atmospheric environments:
ASTM a123 is the specification for hot dip galvanizing. This specification covers standard requirements for hot-dip galvanized coatings of iron and steel products made from rolled pressed and forged shapes, castings, plates, rods and strips. This specification covers both raw and processed products, such as assembled steel products, structural steel fabrication, large tubes that have been bent or welded before galvanizing, and wire rod fabricated from uncoated steel wire.
