Cold galvanizing looks more smooth, bright, color passivation process plating layer is yellow-green in color, was colorful. Plating layer was bluish-white or white with white passivation process was green, white coating passivation process and the sun was significant Colorful angle. The complex workpiece angular edges parts prone to “electrical burning” from gloomy, the parts of the zinc layer thick. Yin corner site is easy to form a current dead undercurrent gray area and the area zinc layer is thinner. The workpiece overall zinc tumor, caking phenomenon.
Hot dip galvanized look a little rough compared to the electro-galvanized, silvery white, look prone process waterlines and a few drops of tumor is more obvious, especially in the one end of the workpiece. Hot dip galvanized zinc layer than a few times of the electro-galvanized thick corrosion protection is several times that of the electro-galvanized.
Galvanized Steel Round Pipe(Hot Dipped or Pre Galvanized) | |
Material | GR.A,GR.B,GR.C,Q195,Q235B,Q345B and so on. |
Standard | API 5L,API 5CT,ASTM A53,ASTM A500,GB9711.1 |
Wall Thickness | 1MM~12MM as the requirement |
Outer Diameter | 21.3MM~219.1MM |
Length | 5m-14m,5.8m,6m,10m-12m,12m or as customer's actual reques |
Zinc Coating | 30g-275g |
Technique | Seamless / ERW(GALVANIZED) |
Packing | Bundle, or with all kinds of colors PVC or as your requirements |
Pipe Ends | Plain end/Beveled,protected by plastic caps on both ends |
Surface Treatment | 1. Galvanized ;2. PVC,Black and color painting |
Product Application | 1. Fence, greenhouse, door pipe,greenhouse |
old galvanized steel pipe | roughness of galvanized steel pipe |
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properties of galvanized steel pipe | silver galvanized steel structural pipe fitting floor flange |
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