Hot dip galvanized pipe is also called hot dip galvanized steel pipe. The surface of the steel pipe is galvanized, which can effectively prevent corrosion and rust of the steel and help the steel prolong its service life. There are two types of hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing has a thick galvanized layer, uniform coating, strong adhesion, and long service life; electro-galvanized has low cost, rough surface, and poor corrosion resistance. So how to choose hot dip galvanized pipe?

1. Look at the appearance

A good hot dip galvanized pipe has a smooth appearance, no zinc bumps or burrs, and is generally silvery white; poor-quality hot dip galvanized steel pipes have no metallic luster, are light red or similar in color to pig iron, and are prone to burrs, scratches, and deep scratches reduce the strength of steel.

2. Weighing

High-quality hot dip galvanized steel pipes contain fewer impurities, have high steel density, and have small dimensional tolerances. Weighing and checking it can determine whether the quality is good or bad. Generally, considering the cumulative error, it is recommended that the effect of full-phase weighing will be better.

3. Look at the performance

An excellent hot dip galvanized pipe has no hydrogen embrittlement and no temperature hazard, which can ensure that the mechanical properties of the material remain unchanged, and the corrosion resistance is good. The neutral salt spray test reaches 240, and the weight of the galvanized layer should not be less than 500g/m2; The material is poor, and the end face of the cutting head often has the phenomenon of meat loss, unevenness, and the horizontal ribs of fake and inferior hot dip galvanized pipe is thin and low, and the phenomenon of dissatisfaction often occurs.

4. Do experiments

Uniformity and cold bending tests are carried out on hot dip galvanized pipe. High-quality hot dip galvanized pipe samples are dipped in copper sulfate solution 5 consecutive times without reddening; galvanized steel pipes with a diameter of no more than 50mm should be subjected to cold bending tests, and the bending angle is 90°.

5. Look at the price

How much is the price of hot dip galvanized pipe per ton? The price of hot dip galvanized steel pipe is related to the specification, material, model, surface quality, smoothness, dimensional tolerance, thickness and other factors of hot dip galvanized pipe. The price is usually 4000-4500 yuan per ton; If it is calculated by meters, the weight and length of the steel pipe should be considered, and the conversion can be done.