China API 5L Psl1 B/L245 X42/L290 X52/L360 X56/L390 X60/L415 X65/L450 X70/L485 X80/L555 Seamless Steel Tubes, Find details about China Steel Tubes, Steel Pipe from API 5L Psl1 B/L245 X42/L290 X52/L360 X56/L390 X60/L415 X65/L450 X70/L485 X80/L555 Seamless Steel Tubes