DIN 17175 Round Galvanized Steel Pipe Seamless 6-12m

Manufacturer DIN 17175 Round Galvanized Seamless Steel Pipe In China

Technique:Hot Rolled

Product name:Seamless Steel Pipe

End protector:Plastic Pipe Cap

Type:Seamless Round Steel Pipe

Surface:Painting

Shape:Round Shape

Usage:Construction Structure

Steel Grade:GB JIS ASTM BS DIN

Applications
Hot-dip galvanized steel pipes are widely used in construction, machinery, coal mines, chemicals, electric power, railway vehicles, automobile industry, highways, bridges, containers, sports facilities, agricultural machinery, petroleum machinery, prospecting machinery, greenhouse construction and other manufacturing industries.

Galvanized steel pipe is a welded steel pipe with a hot-dip galvanized or electro-galvanized layer on the surface. Galvanizing can increase the corrosion resistance of steel pipes and prolong the service life. Galvanized pipes are widely used. In addition to being used as pipeline pipes for general low-pressure fluids such as water, gas, and oil, they are also used as oil well pipes and oil pipes in the petroleum industry, especially in offshore oil fields, and oil heaters and condensers in chemical coking equipment. Pipes for coolers, coal distillation washing oil exchangers, and pipes for trestle piles, supporting frames for mine tunnels, etc.

Production steps
The process flow is: black tube - alkali washing - water washing - pickling - water rinsing - dipping aid - drying - hot dip galvanizing - outside blowing - inside blowing - air cooling - water cooling - Passivation - water rinsing - inspection - weighing - storage.

Current national standard
National standard and size standard of galvanized pipe
GB/T3091-2015 Welded steel pipes for low pressure fluid transportation
GB/T13793-2016 Straight seam electric welded steel pipe
GB/T21835-2008 Welded steel pipe dimensions and weight per unit length

Detailed introduction
Hot-dip galvanized pipe is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Hot-dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in the tank of ammonium chloride or zinc chloride aqueous solution or mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to the in the hot dip bath. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life. The hot-dip galvanized steel pipe substrate undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a compact structure. The alloy layer is integrated with the pure zinc layer and the steel pipe substrate, so it has strong corrosion resistance.