Black steel pipe is made from steel that has not been galvanized. It is called "black" steel pipe becasue the pipe has the dark colored iron-oxide scale formed on its surface.
Black steel pipe is widely used in oil and petroleum industries to transmit large quantities of water, oil and gas, high pressure seam. Also, it can be used for conduits to protect electrical wiring.
The pipe is manufactured without a seam which designed as a better pipe for carry natural gas or propane into residential homes and comeericial buildings.
The size for black steel pipe:
OUTSIDE DIAMETER: 8.7MM ~ 720MM
WALL THICKNESS: 2.7MM ~ 23.01MM
LENGTH: 6MTR ~ 18MTR
