Pre-galvanized steel pipe is made of galvanized steel strip.However, it’s antiseptic properties is poor than hot dipped galvanized steel pipe.

1.Cold Galvanizing Welding Process

Material Inspection (Steel Pipe) --- Hanging --- De-greasing --- Rinsing --- Pickling --- Washing --- Dipping Fluxing --- Hot Air Drying --- Inside and Outside Hot-dipped Galvanizing Blow

--- Cooling --- Passivation and Rising --- Unloading --- Inspection and Trimming --- Type Identification --- Packaging and Storing and Transportation

2. Product Information

Specification: OD: 21.3mm ~ 610mm

                          WT: 0.5mm ~ 20mm

                          LENGTH: 0.3mtr ~ 18mtr, Ramdon Length, Fixed Length, SRL, DRL

Standard and Grade: GB/T 3091 Q195/Q215/Q235/Q345, BS 1387, EN 39, EN 1139 S235JR/S275JR, ASTM A53 GR. A/B/C, JIS G3444 STK 400/STK 500

Pipe Type: Electric Resistance Welded Steel Pipe (Round/Square/Rectangular)

End: Square Cut/Threaded, Burr Removed

Zinc Coating: 10~50 g/m2

Packing: Steel Strips bundled, Plastic Caps plugged, Waterproof Paper wrapped etc.

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