Black steel pipe is a very common kind of steel product, there is no coated zinc or paint on the surface, but a dark iron oxide during the manufacturing process on the surface, so it is known as black steel pipes.The black steel pipe has high strength and has no seam. Very suitable for liquefied ga

For thousands of years, People have been utilizing and producing pipes for different purposes. It is confirmed that in 2000 BC ancient times, agriculturists or Chinese people have utilized pipes made from different materials like wood or bamboo, for water transportation. Since the 1800s, great progress have been accomplished in the technology of steel pipes, including improving manufacturing methods, developing applications for their use.