• Galvanized Steel Pipe
  • Galvanized Steel Pipe
  • Galvanized Steel Pipe
  • Galvanized Steel Pipe

Galvanized Steel Pipe

Galvanized steel pipes are usually coated with zinc on the outside of low carbon steel. The galvanized layer is usually 20 um thick. The melting point of zinc is 419 C and the boiling point is about 908 C. In welding, zinc melts into liquid and floats on the surface of the molten pool or at the root of the weld. Zinc has a high solid solubility in iron. Zinc liquid will etch weld metal along grain boundary. Low melting point zinc will form "liquid metal embrittlement". At the same time, zinc and iron can form intermetallic brittle compounds. These brittle phases reduce the plasticity of weld metal and cause cracks under tensile stress. If fillet welds, especially T-joints, are most prone to penetrating cracks.

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Introduction:

Galvanized Steel pipe 

Galvanized steel pipes are usually coated with zinc on the outside of low carbon steel. The galvanized layer is usually 20 um thick. The melting point of zinc is 419 C and the boiling point is about 908 C. In welding, zinc melts into liquid and floats on the surface of the molten pool or at the root of the weld. Zinc has a high solid solubility in iron. Zinc liquid will etch weld metal along grain boundary. Low melting point zinc will form "liquid metal embrittlement". At the same time, zinc and iron can form intermetallic brittle compounds. These brittle phases reduce the plasticity of weld metal and cause cracks under tensile stress. If fillet welds, especially T-joints, are most prone to penetrating cracks.

Product name : Galvanized steel pipes

Application : used for transporting low pressure liquid , gas and heating 

Technique : Hot rolled/Cold drawn

Grade Group : A53-A369, API J55-API P110, Q195-Q345, 10#-45#

Shape : Round

Specification : OD : 21.3mm~406.4mm

                          WT : 0.5mm~20mm

                          Length : 0.3mtr~18mtr,Random length,Fixed length,SRL,DRL

Standard and Grade : GB/T 3091 Q195/Q215/Q235/Q345,ASTM A53 , BS 1387, JIS G3444 STK400/STK500 , EN39 , EN1139 S234JR , EN10025 , EN10219

Pipe Type : Seamless & Welded Steel Pipe (Round/Square/Rectangular)

End : Square Cut/Threaded, Burr Removed

Zinc Coating : 120~500g/m2(30um~70um)

Packing : Steel Strips Bundled , Plastic Caps Plugged , Waterproof Paper wrapped etc .

Specification:

Coating Type:

1. Pre-painted (zinc: 60~120g/m2)
2. Hot-dipped Galvanized (zinc 120~500g/m2)
3. Cold-dipped Galvanized(zinc 10~50g/m2)

Application:

Galvanized steel pipes are usually coated with zinc on the outside of low carbon steel. The galvanized layer is usually 20 um thick. The melting point of zinc is 419 C and the boiling point is about 908 C. In welding, zinc melts into liquid and floats on the surface of the molten pool or at the root of the weld. Zinc has a high solid solubility in iron. Zinc liquid will etch weld metal along grain boundary. Low melting point zinc will form "liquid metal embrittlement". At the same time, zinc and iron can form intermetallic brittle compounds. These brittle phases reduce the plasticity of weld metal and cause cracks under tensile stress. If fillet welds, especially T-joints, are most prone to penetrating cracks.

Hot Dip Galvanized Pipe is used for transporting low pressure liquid ,gas and heating

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