Carbon Steel Pipe

Galvanized steel pipe is the carbon steel pipe that are coated with a protective layer of zinc. The zinc layer served as a sacrificial layer, it will get rust before the carbon steel under neath it. Galvanized steel pipe is divided into cold galvanized steel pipe, hot galvanized steel pipe. Galvanized layer will strengthen the anti-corrosion performances of steel pipe.
 

Galvanized steel pipe is the carbon steel pipe that are coated with a protective layer of zinc. The zinc layer served as a sacrificial layer, it will get rust before the carbon steel under neath it. Galvanized steel pipe is divided into cold galvanized steel pipe, hot dipped galvanized steel pipe. Galvanized layer will strengthen the anti-corrosion performances of steel pipe.

Galvanized steel pipe used as a water pipe initially, after a few years in the pipe produced a lot of rust scale, yellow water not only pollution sanitary ware, but also mixed with bacteria not smooth wall breeding, corrosion caused by the water heavy metal content is too high, serious harm to human health. Then in 60 70 time, developed countries began to research and develop new pipe, and prohibit galvanized steel pipe in turn. Our country has clearly banned galvanized steel pipe from the year 2000. Most of the newly built communities have rarely used galvanized steel pipe, but some communities are still using galvanized steel pipe.

Hot dip galvanized steel pipe is to make molten metal and iron matrix reaction to produce an alloy layer, so that the matrix and coating are combined. Hot dip galvanized steel pipe is first pickling, in order to remove iron oxide on the surface of the steel pipe, after pickling, through ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank for cleaning, and then into the hot dip plating tank. Hot dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. Hot dip galvanized steel pipe matrix and molten bath have complex physical and chemical reactions, forming corrosion resistant structure of tight zinc-iron alloy layer. The alloy layer is integrated with pure zinc layer and steel tube matrix, so it has strong corrosion resistance.

Cold galvanized steel pipe is electric galvanized, galvanized amount is very little, only 10-50g/m2, its own corrosion resistance is much different than hot galvanized pipe. Regular galvanized pipe manufacturers, in order to ensure quality, most do not use galvanized (cold plating). Only those small enterprises with obsolete equipment use electrogalvanizing, of course, their price is relatively cheaper. The Ministry of Construction has officially below, the elimination of cold galvanized pipe technology behind, not allowed to use cold galvanized pipe for water, gas pipe. The galvanized layer of cold galvanized steel pipe is an electric coating, and the zinc layer is independently layered with the steel pipe matrix. The zinc layer is thin, and the zinc layer is simply attached to the steel pipe matrix and easy to fall off. Therefore, its corrosion resistance is poor. In new residential buildings, it is forbidden to use cold galvanized steel pipes as water supply pipes.
 

1. Galvanized pipe can be protected by hot dip galvanized surface, difficult to access in the lumen or any other coated corner, deepened zinc can be easily covered to the top, so that the entire galvanized pipe is protected.
2. Hot galvanizing process specially suitable for kinds of strong-acid, alkali fog and other strong corrosive conditions. This kinds of fastener used a lot in outside of steel tower contribution.
3. The impact resistance and wear resistance of the galvanized pipe are very good, because the hardness of the galvanized layer is greater than the hardness of the steel, so the impact resistance and wear resistance of the hot galvanized pipe is quite good. Furthermore, the biggest advantage of galvanized is that the zinc layer at the corner will be relatively thick, toughness and wear resistance is good, and other coatings are often the most difficult to construct at the thinnest corner, so it is easy to get injured.
4. Hot dip galvanizing is also a big feature is occasionally subjected to considerable mechanical damage or other reasons caused by a small part of the zinc layer off, iron base bare, then the zinc layer and other coating around the same spirit of sacrifice to protect the steel here, so that it is not eroded.
5. Galvanized steel pipe have long lifetime. But in different conditions the lifetime of use are different. Generally speaking, 13 years in heavy industrial district, 50 years for ocean environment, 104 years in suburbs, 30 years in city. In fact galvanizing have played a role of anti- rusty, it is no need other rust treatment.
 

As a leading line pipe distributor, Metleader has been exporting line pipes with big quantity to many countries and areas. Our company have been passed several certificates including ISO9001: 2008, ISO14001, OHSAS18001, CE certificate, one member of supplier system of Sinopec, and CNPC. In situations like high pressure, temperature, and corrosion, our Carbon Steel Pipes are perfectly suitable. We will provide the best service to our customers. welcome your inquiry timely sales@metleader.com .