Pre Galvanized Square Tubing
Dimensions of Pre Galvanized Square Tubing
Comparison Between Pre Galvanized Square Tubing and Hot Dipped Galvanized Tubing
|
Type |
Zinc Coating Thickness |
Corrosion Resistance |
Surface Finish |
Primary Applications |
|
Hot-Dip Galvanized |
50–150+ µm |
Excellent |
Moderate (slight roughness) |
Outdoor structures, marine environments, industrial facilities |
|
Pre-Galvanized |
20–40 µm |
Good |
Smooth, uniform |
HVAC systems, light framing, interior construction |
Manufacturing Process
Steel Strip Preparation:
Cold-rolled steel coils are first cleaned and treated to remove impurities, ensuring optimal adhesion of the zinc layer.
Zinc Coating Application:
The steel strip is continuously passed through a galvanizing bath, where it receives a zinc coating via either electro-galvanizing (electroplating) or pre-heating and hot-dip galvanizing methods-this occurs before the tube is formed.
Roll Forming:
The pre-coated steel strip is then fed into a series of precision rollers that gradually shape it into a square tube profile.
High-Frequency Welding:
The edges of the strip are joined using high-frequency electric resistance welding, creating a seamless longitudinal seam.
Cutting and Finishing:
The continuous tube is cut to required lengths, inspected for dimensional accuracy, and packaged for shipment.
Product show
Package and Delivery
Water Proof Package
Nesting Loading
