I'm a big carbon steel pipe manufacturer, and main products are ERW & SSAW welded pipes. My factory has 9 spiral lines and 1 erw line, and annual output is about 600,000 metric tons. We can produce as per API 5L standard. Licence No. is 5L-0479. Pipe size is range from 8" to 120", and steel grade is from Gr.B to X80. Hope we can cooperate with your esteemed company.