It is widely use in many fields like the following: 

Welded steel pipes with hot dip or electrogalvanizing coating. Galvanizing can increase the corrosion resistance of steel pipes and extend their service life. Galvanized pipe is widely used, in addition to the general low pressure fluid such as water, gas, oil pipe, but also used in the petroleum industry, especially the Marine oil field oil pipe, oil pipe, chemical coking equipment oil heater, condensation, coal exchange, coal exchange oil washing cooler, bridge pile, mine tunnel support frame pipe.

Feature of GI Hot dip galvanized hollow section：

1. Side length :25*25, 30*30, 40*40, 100*100.

2. Standard：AiSi,ASTM,BS,DIN,GB,JIS.

3. Certificates: API, CE, RoHS, SNI, BIS, SASO, PVOC, SONCAP, SABS, sirm, tisi, KS, JIS, GS, ISO9001.

4. Outer diameter:  Square: 10*10-1000*1000mm Rectangle: 10* 15-800 *1100mm Round: 10.3mm-609mm.

5. Technology: ERW, LSAW, SSAW, seamless, welding.

Specification of GI Hot dip galvanized hollow section：

Production of GI Hot dip galvanized hollow section：