Difference between cold-galvanized steel pipe and hot-dip galvanized steel pipe

- Nov 18, 2020-

Difference between cold galvanizing and hot galvanizing
Electrogalvanizing, commonly known as cold galvanizing, is the use of electrochemical methods, zinc as the anode, zinc atoms lose electrons and ions in the electrolyte solution, and steel as the cathode, zinc ions reduced by the deposition of zinc atoms on the surface defects of the strip, coating formation . 

The zinc content of hot-dip galvanized steel pipes and cold-galvanized steel pipes is very different. Hot-dip galvanizing should not be too small, the double-sided 50 ~ 60g / m2 is generally the smallest, up to 600 grams / square meter. The cold-galvanized steel pipe has a very thin galvanized layer with a minimum of 15 g/m2, but for thicker coatings, the line speed is very slow and does not suit the process characteristics of modern installations, typically up to 100 g/m2.

Product Description
End treatment
Quality inspection
Packaging & Shipping

1. Packing: in bundles/in bulk/in plastic packing.

2.Trade terms:FOB/CFR/CIF

3.Shipping port: Xingang Tianjin or any port in China



  1) Small diameter: Weight >Measurement

                      a. Length: ≤5.8m, loaded in 20FT Container, Max 27tons

                      b. Length: ≤11.8m, loaded in 40 FT Container, Max 27tons

                      c. Length: ≥12m, shipped by bulk vessel. FILO terms

  2) Big dimater: Weight<Measurement, loaded as per container size

                      a. Size of 20 FT Container(inside :5898*2352*2350mm)

                      b. Size of 40FT Container(inside: 12024*2352*2395mm)


5.Delivery time: Normal size: 7days send from warehouse directly.


                           Speial size: 25-30days custom made for you.

Factory view

Q: Are you trading company or manufacturer ?

A: We are factory.

Q: How long is your delivery time?

A: Generally it is 3-5 days if the goods are in stock. or it is 7-15 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample for free charge 

Q: What is your terms of payment ?

A: we accept T/T ,LC , Western union, paypal ,Alibaba Credit Insurance Order etc.

    The payment method can be negotiated by both parties according to the actual situation.