Generally speaking, there are three major types of galvanized steel materials in the current steel pipe market:
1)Hot dip galvanized steel:
With reference to hot dipped galvanized steel pipe, the hot dip galvanizing process is where an already formed part, for example plate, round, square or rectangular tube is dipped in a zinc bath. A reaction takes place between the steel and the zinc during the time the part is in the zinc bath. The thickness of the zinc coating is influenced by a number of factors, including the surface of the steel, the time the steel is dipped in the bath, the composition of the steel as well as the steel’s size and thickness. One advantage of hot dip galvanizing is that the entire part is covered including the edges, welds, etc. giving it an all-round corrosion protection. The end product can be used outdoors in all different weather conditions. It is the most popular galvanizing method and is widely used in the construction industry.
Pre-galvanized steel refers to steel which was galvanized while in sheet format, thus prior to further manufacturing. Pre-galvanization is also known as mill galvanized, due to the fact that the steel sheet is rolled through molten zinc. After the sheet is sent through the mill to be galvanized it is cut to size and recoiled. A specific thickness is applied to the entire sheet, for example pre-galvanized Z275 steel has a 275g per square meter zinc coating. Today pre-galvanized steel pipes are used for a wide variety of products including conduit, lip and open channels.
Electro-galvanized steel refers to applying a zinc coat deposited onto the steel using electro deposition. Electro-galvanized steel has the advantage that the coating thickness can be controlled independently on the in- and outside parts. The thickness of the coating applied through electro galvanization is precise.
In daily life, we often find that some customers easily tend to make a big confusion about galvanized steel pipe in the pipe market. Galvanized pipes are steel pipes that have undergone the galvanization process which prevents the steel from aging and rusting. The manufacturing of galvanized pipes occurs in two main processes: First, steel pipes are manufactured from raw materials, and then the pipes are galvanized in molten zinc. The finished product is a chemically bonded combination of steel pipes and zinc coating. In that regard, galvanized steel pipe generally refers to hot dipped galvanized steel pipe strictly. Galvanized pipes come in various types, sizes and lengths. This product is used in underground piping, overground piping systems, industrial purposes, scientific experiments and etc. Today, we would like to give further information about another so-called “galvanized steel pipe” in the steel industry. Pre Galvanized pipes are manufactured through a coil/sheet that has undergone the galvanization process. Further galvanization is not required after the coil/ sheet has been manufactured to pipe steel section. These pipes and tubes have a high structural integrity and are resistant to corrosive environment. G.P Pipes & Tubes are manufactured as per ASTM standards. Pre galvanized steel pipes & tubes are manufactured from ½” to 8″. Square hollow sections and rectangular hollow sections are also available in pre galvanized finish. These pipes are generally used for fencing framework and indoor fabrication like truss work and grill work.
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Post time: Oct-31-2018