Galvanized square pipe is a square-section steel pipe with hot-rolled or cold-rolled galvanized strip or galvanized coil as blank. It is formed by cold bending and then high-frequency welded.

Learn about common construction problems related to steel pipe pile foundations, as well as solutions to address them.

To deal with the corrosion problem on the surface of the oil casing, cathodic protection technology should be used.

Black structural pipe refers to a structural pipe with a black oxide layer on its surface. The dark color comes from the iron oxide formed on its surface during the manufacturing process. When a steel pipe is forged, black oxide scale forms on its surface.

Seamless pipe fittings refer to pipe components made of seamless pipes. Seamless steel tubes are round, square, and rectangular steel materials with hollow sections and no seams around them.

Black galvanized pipe is a kind of pipe that coats the surface of ordinary black steel pipe or black iron pipe with a layer of zinc to improve its anti-corrosion performance.