The galvanized elbow has a tiny volume of galvanizing, only 10-50g/m2, and its corrosion resistance is considerably worse than that of hot-dip galvanized pipe. Normal galvanized elbow companies are permitted to use cold galvanized pipes for water and gasoline pipes.
Cold galvanized elbow: The galvanized layer of the cold galvanized elbow is an electroplated layer, and the zinc layer and the elbow base are layered independently. The zinc layer is thin, and the zinc layer is simply connected to the steel pipe base and is easy to fall off. Therefore, its corrosion resistance is poor. In new residences, it is forbidden to use cold galvanized elbows as the water provide pipe connection parts.

Scorching-dip galvanized elbow: A scorching-dip galvanized elbow is a combination of a molten metal and an iron matrix to produce an alloy layer, therefore combining the substrate and the plating. Scorching-dip galvanizing is to 1st pickle the elbow, in buy to get rid of the iron oxide on the surface of the elbow, soon after pickling, it is washed by ammonium chloride or zinc chloride aqueous solution or a mixed aqueous answer of ammonium chloride and zinc chloride, and then Feed into the hot dip plating tank. Scorching-dip galvanizing has the benefits of uniform plating, strong adhesion and extended services daily life.
The use of galvanized elbows: the use of galvanized elbows. The iron pipe connection for fuel and heating is now a galvanized elbow. The galvanized elbow is utilised as a water pipe connection. Soon after a number of years of use, a huge volume of rust is produced within the pipe. The yellow water that flows out not only pollutes the sanitary ware, but also is mixed with the bacteria that increase on the uneven inner wall. The rust triggers the heavy metal content material in the water to be too substantial, which significantly endangers the well being of the human physique.
In the 1960s and 1970s, designed countries in the planet began to produce new kinds of pipes, and successively banned galvanized pipes and galvanized elbows. The Ministry of Construction and other 4 ministries also issued a document clarifying that galvanized elbows will be banned from 2000. Prospek Berjualan di Ecommerce Saat Ini At present, cold water pipes in newly developed communities have seldom utilized galvanized elbows to connect pipe fittings. In some districts, hot water pipes use galvanized bends. Head connection.