What are the characteristics of steel pipe and galvanized steel pipe?

by | Jun 16, 2022 | Industry Knowledge

The characteristics of plastic steel pipe for fire protection:
1, health non-toxic, non-fouling, do not breed microorganisms, to ensure fluid quality.
2, the flame retardant ability is strong, in the combustion test, the coating has no spontaneous combustion phenomenon, no fall off.
3, the installation process mature, convenient and fast, can use a variety of connection.
4, good resistance to natural weathering, suitable for long-term static fire water, foam and other harsh environment.
5, pipe wall smooth, improve transport efficiency, long service life.
6, environmental protection, long time to maintain the water state to ensure good water quality, and will not because of the passage of time and environmental pollution.

The difference between galvanized steel pipe and plastic steel pipe:

1, galvanized steel pipe is to make molten metal and iron substrate reaction and produce alloy layer, so that the substrate and coating combined. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned through ammonium chloride or zinc chloride aqueous solution or ammonium chloride and zinc chloride mixed aqueous solution tank, and then sent to the hot dip plating tank. The advantages of galvanized pipe are: uniform coating, strong adhesion, long service life. Hot galvanizing because now many enterprises in order to profit, the galvanizing layer also thin, the original theoretical life is 7-8 years, and now product quality can only be guaranteed in 23 years.
2, fire coated steel pipe is a combination of steel pipe and plastic, can be used in any caliber of pipe, connection is not limited to galvanized pipe thread connection, groove connection, There are welding connections, flange connections, bimetal welding connections and so on, the emergence of plastic coated steel pipe to solve the above problems, it has both the strength of steel pipe, steel pipe inner and outer layers of corrosion so that the inner and the outer wall smooth, does not reduce the flow diameter, improve transport efficiency. Corrosion resistance, coating adhesion, impact resistance is good, adapt to harsh natural environment normal work. Long service life, is five times more than galvanized pipe.

Classification of plastic coated steel pipe:

The coating raw materials of plastic coated steel pipe include epoxy resin (epoxy powder) and polyethylene two coating materials. The inner wall of the pipeline adopts epoxy powder hot-melt coating, the outer wall of pipeline generally uses epoxy powder or polyethylene anti-corrosion. Epoxy powder is a kind of thermosetting coating. The steel pipe is firstly treated by shot blasting, then heated by medium frequency, and then sprayed on the surface of the pipe by static electricity spraying technology, then solidified to form a coating.
(1) According to the difference of coating raw materials, including inner and outer plastic coated steel pipe, outer galvanized steel pipe inner plastic coating, inner epoxy and outer polyethylene corrosion resistant steel pipe and TPEP anticorrosive steel pipe.
(2) According to the use of the division, including fire-fighting plastic steel pipe, mine plastic pipe, plastic pipe for water supply and drainage, plastic pipes for tap water supply, and plastic pipe of cable protection.
(3) Divided according to the installation mode, including overhead plastic coated steel pipe, municipal pipe gallery plastic steel pipe and buried plastic pipe.
(4) Divided according to the connection mode, including thread connection of plastic-coated steel pipe, clamps and grooves connection, plastic pipe flange connection, bimetal welding plastic pipe, flexible socket plastic pipe.
Customers can choose different plastic-coated steel pipes according to different uses, anticorrosion grade requirements and connection methods.

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