JIS ASTM Standard Hot Dipped Galvanized Steel Tube Hot / Cold Rolled

Galvanized seamless tube is divided into cold-plated steel seamless tube and hot dip seamless tube.

Hot Dip Seamless Tube :

The seamless tube is to make the molten metal and iron substrate reaction, the alloy layer, so that the substrate and coating combination of both. Hot-dip galvanizing is the first steel pickling, in order to remove the steel tube surface of iron oxide, pickling, aqueous solution of ammonium chloride or zinc chloride or ammonium chloride and zinc chloride mixed aqueous solution tank cleaning, and then send into the hot dip tank. Hot dip galvanized coating uniformity, strong adhesion, and long life.

Cold-Plated Seamless Tube :

Cold galvanized, electric-galvanized, galvanized the amount of small, only 10-50g/m2 of its own resistance to corrosion than hot dip galvanized tube a lot of difference. Regular galvanized tube manufacturers, in order to ensure the quality, most do not use electric-galvanized (cold-plated). Only those small-scale, outdated equipment and small businesses with electric galvanized, of course, their prices are relatively cheap. The Ministry of Construction has formally below, cold galvanized tube to eliminate backward technology, the future not be allowed to cold galvanized tube for water, gas pipes.

Galvanized Seamless Mechanical Properties :

The mechanical properties of steel is to ensure that an important indicator of the steel end-use properties (mechanical properties), it depends on the chemical composition and heat treatment of steel. Steel standards, according to different requirements, the provisions of the tensile properties (tensile strength, yield strength or yield point elongation) and hardness, toughness, user requirements, high and low temperature performance.

Galvanized steel tube maintains a wide range of benefits, suitable for use in highly corrosive environments. The semi-smooth, zinc finish of galvanized steel tube provides a layer of protection that is not seen in other types of protective materials. The galvanized coating process protects the underlying steel from encountering corrosive elements that could deteriorate the steel and ultimately weaken its structural integrity. Main advantages of galvanized structural tube include:

• Protects against corrosion and rust

• Increased structural longevity

• Overall enhanced reliability

• Affordable protection

• Easy to inspect

• Less repairs

• Rugged toughness

• Easier to maintain than standard painted tube

• Protected by advanced ASTM standardization

Dimension, Standard & Grade :