High Precision Cold-rolled Seamless Steel Pipe   Main Features: high accuracy, excellent brightness, high cleanness inside wall.   Application：used in automobile and in the occasion where the high precision , brightness, cleanness of the tube are required.   Process Routing：Quality carbon steel、cold-rolled without heat treatment (BK condition)、no-destructive testing、in the wall honing and inside flushing under the high pressure、antirust oiling outside surface、plastic capping on both ends.