The difference between pre-galvanized pipe and hot-galvanized pipe

The anticorrosion property of pipe is effectively improved by galvanizing. And the steel pipe galvanized mainly hot dip galvanized, pre-galvanized and galvanized three common methods, according to the final use of the steel pipe environment to choose the corresponding method.

Cold galvanized slip on flanges finished in Haihao Group

The following is mainly to introduce the difference between pre-galvanized steel pipe and hot-galvanized steel pipe: 

1.The pre-galvanized pipe is a tube that is galvanized in sheet form, so before further manufacturing, the sheet is sent to a mill for galvanizing, and then cut into a certain size and rolled back. The minimum thickness of the pipe is 12 m.

One of the advantages of pre-galvanized steel pipe over hot-dipped galvanized steel pipe is its better appearance. The pre-galvanized material can be used in a variety of products, including conduits, lip plates and open channels.

Hot galvanized steel tubes

2.Hot dip galvanized pipe refers to the tube after manufacturing immersed in the bath.The thickness of the zinc coating will be up to a minimum of 45 m, and the thickness of the zinc coating will be influenced by a number of factors, including the surface of the steel, the length of time the steel is immersed in the bath, the composition of the steel, and the size and thickness of the steel.

The advantage of hot dip galvanizing is that the galvanized coating covers the whole part, including the edges, welds, etc., thus providing a full range of corrosion protection. Hot-dipped galvanized steel tubes can be used outdoors in all weather conditions. This is the most popular method of galvanizing and is widely used in the construction industry.